COUNTDOWN TO OPENING NIGHT 2010 2010-03-19 18:00:00 GMT-06:00

2010 TRACK RULES SATURDAY NIGHT RACES

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Rule Book Disclaimer

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator, or official. The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials.

IMAGES, PHOTOS and VIDEO. All images, videotape, camera film, etc… taken on Wild West Speedway grounds remains the property of Wild West Speedway. All drivers/owners should inform their crewmembers, fans and families that no images may be used for commercial gain without written permission from Wild West Speedway. Anyone found publishing images taken at Wild West Speedway without written permission would be in breach of copyright laws. Wild West Speedway reserves the right to restrict any person or persons from photographing events held at this facility. Furthermore, Wild West Speedway reserves the right to confiscate any film taken of any event.

GENERAL TRACK RULES
1. Appeal Process:
1.1 A car owner or driver may file an appeal against a judgment imposed by the Technical Director provided that the individual submits such appeal within one hour of the first judgment. Appeals must be submitted in writing, signed by the applicant, and accompanied by the appeal fee of one hundred dollars. If the appeal is won the fee will be refunded. If the appeal is lost the fee is non-refundable. Final appeals must be received at the office within 48 hours of notice to appeal.
1.2 The General Manager shall establish procedures for hearing an appeal and shall not be bound by technical or formal rules of evidence for procedure. The hearing will be conducted in the manner best suited to the relevant facts. He or she may review written information concerning the appeal and the decision may be based on that evidence. The decision may also be made to hold another hearing.
1.3 The General Manager shall determine time, date and location of the hearing. The appellate will be notified in writing. There is no restriction on those who may attend the hearing.
1.4 Cost of the preceding shall be at the expense of the racetrack. However, if the General Manager determines that the appeal may have been instituted without merit, the cost for such hearing will be the responsibility of the owner/driver who instituted the charge.
1.5 The racetrack reserves the right to penalize any driver or car owner judged to be spiteful, malicious, or acts contrary to the rules and regulations. The racetrack shall have the right to publish the judgment of the General Manager and use the names involved. The persons or teams so named shall have no recourse to act against these parties or the publisher of the judgment.
2. Driver Eligibility:
2.1 Our racing events are open to all persons complying with these rules and specifications and their admission into the racing area signifies their acceptance of and compliance with all provisions.
2.2. All drivers must complete a driver agreement.

3. Conduct:

3.1 Professional, courteous conduct is expected from all participants at all times. Anyone acting in an unsportsmanlike manner may be put on probation, suspended and/or fined according to the seriousness of the offense. Owners and drivers will be responsible for the conduct of their pit crew and/or any person signing in on their car. The car owner is the sole representative in any debate with an official relating to his/her car.

3.2 Refusal of any owner, driver or crew to abide by the set rules and the usual policy of conducting auto races will be grounds for the management and/or technical committee to refuse to let such person or car take part in race program and/or institute penalties as they see fit. Troublemakers will not be tolerated and may be barred from all speedway events.

3.3 Any participant entering the judges stand, announcers booth, or flag stand for the purpose of argument will be disqualified and lose points and money for the entire program.

3.4 Any person caught striking a track official will be banned from the facility for a period of no less than 1 (one) year. Additionally, we will file charges and prosecute for assault.

3.5 Any fighting in the pit area will subject the offenders to suspension depending upon the seriousness of the incident. Any continuing problems from the same individual will result in permanent suspension.

3.6 No drinking of any alcoholic beverage before or during the racing program!!! Violation of this rule will result in expulsion from the pits. Management shall then determine what disciplinary action to be taken before the next race or meeting, whichever is first.

4. General:

4.1 Rules and regulations if not covered herein will be interpreted by the officials and management and will be final. The management will make any changes or additions to the rules when deemed necessary for the benefit of all concerned.

4.2 Continuous development in racing may necessitate changes that could not be anticipated at the time of publishing rules. Alternate rules may be necessary to update, modify, add, or delete rules.

4.3 No deviation from normal running rules shall be made unless all drivers, crew and officials are notified of changes beforehand. Anyone not attending pit meeting will not be given consideration on rule changes during an event.

4.4 Decisions of the officials on interpretation of rules and scoring of position in a race will be final. Public address announcements are not official results. Official results must come from the official scorers.

4.6 Track officials reserve the right to refuse entrance to any car, driver, owner, or any other person or persons to the pit area, infield, or grandstands.

4.7 Drivers will adhere to a five-mile per hour speed limit in the pit area. This includes tow vehicles. Fines and/or suspension may result from speeding in the pit area.

4.8 The speedway will not be responsible for damage to any vehicles in the pit area or competitions area. Only tow vehicles with racecars attached and official cars, designated by promoter will be permitted through the pit gate. Any other vehicles will be charged $10. All tools and equipment must accompany racecar and/or tow car.

4.9 All drivers must wear approved helmets at all times while they are on the track, including hot laps, time trials, and racing. Fire resistant drivers' uniforms, gloves and face shields are also required.

5. Pit Passes:

5.1 A pit pass is a fee charged for entry into the restricted area of the facility it must be worn above the waist and visible at all times. Unauthorized use of pit passes will be dealt with severely.

5.2 No driver, owner or crewmember may enter pit area until he/she has registered and signed all entry forms and releases.

5.3 Pit passes may not be transferred or assigned to anyone else.

6. Minors Release:

6.1 Anyone less than eighteen years of age must have a release signed by his or her parent or legal guardian. This applies to pit crews, drivers, and anyone entering the pits.

6.2 Minimum age for drivers is thirteen. We have the release forms available. Contact us before racing. You cannot enter the pit area without having a release executed.

7. Rain Checks:

If rain should occur before all heat races scheduled for the event have been started, rain checks will be given and no purse or points will be paid. If rain occurs after all heat races have been completed, all money earned will be paid for the events completed. The balance of the purse and events will be added to a later program or programs decided upon by the promoters.

8. Purse and Points:

8.1 The starting driver shall earn all points and payment of purses. It is assumed that financial arrangements have been made between driver and owner.

8.2 In case of overpayment of position, it will be refunded to the track or the track will withhold from any future winning.

8.3 Any car found illegal without protest being filed would forfeit winnings to track. If protested car is found illegal, winnings will be paid back to next positions.

8.4 Car owner may use a "stand in" driver. General Manager must approve all driver changes.

9. Inspection and Protest Procedures:

9.1 Track officials reserve the right to demand the inspection of any part of any racecar for determining the legality without the protest fee. The track officials also reserve the right to refuse the entrance of any car or driver/owner for not complying with the rules.

9.2 A formal protest will be accepted from a driver or car owner only if their car is in a race with the car being protested.

9.3 Protest fee is $50 visual or $100 tear down. The protested car must be torn down or refusal to disassemble for inspection will disqualify car and driver. The speedway is not responsible to furnish any tools or equipment for inspection on a car protested by another driver or car owner.

9.4 All winnings and points for the racing event will be forfeited on any car found illegal or upon refusal to tear down.

9.5 Any car found illegal without protest being filed would forfeit winnings to track.

9.6 Track reserves the right to impound parts or complete cars in the event of disqualification or serious accident.

10. Line Up and Race Procedures:

10.1 Our racing program is based on a full line of cars in each class. If this number is not available, alternate scheduling of program may be used. Racing events may be lined up in various ways to accomplish the best racing program.

10.2 Line-ups for the heat races will be determined by draw.

10.3 Line-ups for heat races will be posted approximately ten minutes before race time. It is the driver's responsibility to check the line up and move their car into the staging lane for line up.

10.4 Cars not in their proper place when the pit steward moves them out to the track will be starting in the back of the pack. We will not hold an event up for you.

10.5 Once the cars have been staged for their event, moving that row straight ahead will fill empty slots in the lineup.

10.6 The inside pole driver sets the pace for the start or restart of the race.

10.7 If a collision or spin out occurs before all cars have cleared the second turn on a start or first restart, the race will be stopped. All cars return to their original lineup position unless they go to the pits or work on their cars. After all cars clear the second turn, the race will be stopped only in case of emergency or multi-car piles up. If the race is stopped after all cars clear turn two but before the first lap is completed, restart will be original lineup single file. Cars causing yellow or red flag will go to the back of the pack as directed by the head flagman.

10.8 Cars may re-enter the track area from pit road under green flag conditions. Cars in the infield may reenter the track if it can be done so safely. Cars may not come onto the track from the pit area.

10.9 If track conditions warrant a caution or red flag, track scorers will immediately stop recording. The lineup for continuation of the race will be based on the running order of the last completed lap. Cars involved in the crash and cars going to pit road will go to the back of the line. Any car that is worked on by driver, crew, or track officials will be moved to the rear of the line.

10.10 The flagman or officials will at any time during a race have the right to deem a car unsafe and have the flagman give the car in question the black-flag. A black flag for unsportsman like conduct disqualifies that car for the rest of the race. If a car receives a black flag for safety reasons, the car can make repairs and return to racing under the track entrance rules.

10.11 In order to get credit for finishing a race, the driver must complete at least one posted lap.

10.12 At the flagman's discretion, the winner may take a victory lap with checkered flag. One slow down lap will be made after receiving the checkered flag before exiting the track.

10.13 In the case of a dead heat, the win goes to the inside car.

10.14 The flagman's decision will be final during any event. Any argument concerning his decision may result in your disqualification for the entire race program.

10.15 During races, the only people allowed on the track are the safety crew and racing officials. Everyone must stay behind the fences at all times unless requested by the officials to assist for some special reason. Anyone coming on to the track to work on a car will cause that car to go to the back of the lineup upon restart of the race.

10.16 Unauthorized driver change will result in disqualification and forfeiture of all money and points earned during the race program.

10.17 Any driver intentionally causing an accident will be disqualified for the rest of the racing program. Officials will decide what action to take on the offending driver.

10.18 All cars are required to help pack the racetrack. No pack, NO HOT LAP!

11. Flags and Lights

11.1 The following flag system will be used in conducting an event.

Green - Beginning of race, track is clear

Yellow - Reduce speeds and maintains position. DO NOT RACE UNDER YELLOW FLAG.
Blue/Yellow - Passing or move over flag. Cars receiving this flag shall yield the groove so that lapping cars may pass.

Red - Emergency on the track, all cars are to stop immediately and proceed to start/finish line for realignment. No working on cars during a red flag. Cars being worked on will be placed at the back of the lineup.

Black - Consultation flag, pull off track immediately. A rolled up black flag is a warning to the driver. Any over aggressive driving will result in disqualification for that race. A black flag held stretched out is for mechanical or hazardous situations, proceed immediately to the pit or work area.

White - One lap remaining in the race.

Checkered - Race is completed.

Any car not meeting the spirit of these specifications and rules, at the discretion of Wild West Speedway officials, will not be allowed to compete until all requirements are accomplished.

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1. SAFETY EQUIPMENT: Rules apply at all times car is on track. Snell-rated SA2000, SA2005 or SFI 31.1/2005 helmet required. Roll bar padding required in driver compartment (Fire retardant recommended). SFI-approved full fire suit required. Fire retardant gloves, shoes and neck brace (or head and neck restraint) required. Right and left seat head supports required if using head restraint system with no neck collar. Recommended: Fire retardant head sock and underwear; collapsible steering shaft. Driver-side window net required, minimum 16 inch by 20 inch ribbon or mesh style, and must be mounted to roll cage so latch is at top front of window. Minimum three inch (two-inch with head restraint system) wide SFI-approved five point safety belt assembly required (Y-type shoulder harness not allowed), must be mounted securely to roll cage, recommended to be no more than one year old. Kill switch required within easy reach of driver and must be clearly marked ‘OFF’ and ‘ON’.

IMCA car specs apply with the following exceptions:

click here for official IMCA rules

ENGINES: No engine claim, aluminum heads OK . BRODIX Aluminum Spec Head are as follows: SP CH USMTS/USMTS (Chevrolet), SP FO USMTS/USMTS (Ford) and SP MO USMTS/USMTS (Mopar). Rear pumps OK.

WEIGHTS: All weights after race with driver in car. If utilizing the Flat Tappet Engine or BRODIX Aluminum Spec Head Engine, the minimum overall weight of the racecar must be two-thousand four hundred (2,400) pounds. If utilizing steel or aluminum heads with a 23-degree valve angle, the minimum overall weight of the racecar must be two-thousand four hundred fifty (2,450) pounds. If utilizing raised runner heads or heads with less than a 23-degree valve angle, the minimum overall weight of the racecar must be two-thousand five hundred (2,500) pounds. Racecars utilizing aluminum heads other than the approved BRODIX Aluminum Spec Heads must have (25) pounds in front of mid-plate.

TRANSMISSION: Open transmission rule. Must have forward and reverse with working clutch.

REAR AXLE: Quick change OK.

BODY: 6" rear spoiler OK, Outlaw bodies and aluminum roof OK.

TIRES: HOOSIER G-60, SW Speed or American Racer G60 and KK-704 (stamped or non-stamped) tires are allowed.

End Modified Rules

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Factory Stock Rules

This class will combine the traditional Oklahoma Factory Stock car class and the IMCA Stock Car class. Cars running the IMCA specifications must be 100% IMCA legal, mixing the two rule sets is not allowed. Our goal is to eventually (3 year plan) have this class IMCA sanctioned stock cars.

1. SAFETY EQUIPMENT: Rules apply at all times car is on track. Snell-rated SA2000, SA2005 or SFI 31.1/2005 helmet required. Roll bar padding required in driver compartment (Fire retardant recommended). SFI-approved full fire suit required. Fire retardant gloves, shoes and neck brace (or head and neck restraint) required. Right and left seat head supports required if using head restraint system with no neck collar. Recommended: Fire retardant head sock and underwear; collapsible steering shaft. Driver-side window net required, minimum 16 inch by 20 inch ribbon or mesh style, and must be mounted to roll cage so latch is at top front of window. Minimum three inch (two-inch with head restraint system) wide SFI-approved five point safety belt assembly required (Y-type shoulder harness not allowed), must be mounted securely to roll cage, recommended to be no more than one year old. Kill switch required within easy reach of driver and must be clearly marked ‘OFF’ and ‘ON’.

OKLAHOMA FACTORY STOCK CAR SPECS:

BODY: Any american made rear wheel drive passenger car with "A" frame front suspension, 108 inch minimum wheelbase. All glass and plastic removed. Must have full windshield screen. Doors must be welded shut. Must have front firewall and floorboards in stock location. Must have stock or fabricated rear firewall. Must have a four point roll cage welded to frame, front and rear hoops are allowed and must be welded to frame and cage all pipe must be inside car. May have nerf bars 1" by 2" square tubing with 45 degree ends. Stock appearing steel bodies only. Plastic noses ok.

SUSPENSION: Only stock suspension parts are allowed in stock locations. No adjustable spring spacers. Racing springs may be used in stock locations. No coilover, aluminum bodied, or air shocks. Only one shock per wheel. Shocks and sway bars must remain in stock locations.

REAR END: Stock or can use 9" but must bolt in stock locations with stock arms. May use weld on caliper brackets, GM metric calipers and hat type rotors. Must be locked.

TRANSMISSON: Must be stock OEM with steel bell housing for standards. May use mini clutch and torque tubes. Drive shaft must be painted white with car number on it.

CARBURETOR: One two barrel or four barrel only. No predators. One 1" spacer may be used.

WHEELS: Steel wheels 10" maximum width 15" in diameter. 1" lug nuts required. Beadlocks allowed.

TIRES: 10" asphalt scuffs only, no retreads.

FUEL: Gasoline only, racing gas ok. Mechanical fuel pump in stock location. Must have racing fuel cell securely mounted in steel container with a tip over valve on vent line.

STEERING: All steering components must meet OEM specifications. Steering quickner OK.

BRAKES : OEM spec. components must be used and all four brakes must work.

WEIGHT: 3200 lbs with driver after race.

INTAKE: Unaltered OEM cast iron, unaltered spec aftermarket aluminum intakes allowed are; weiand GM #7547-1 Ford #7515, #8023, or #7516 chrysler #7545 Edelbrock Gm #2701 Ford #7181 Chrysler #2915.

ENGINE: Stock steel blocks only. No strokers of any kind. Maximum cubic inch limit 368. Steel I beam rods only. One radiator in stock location. No dry sump motors. Hydraulic flat tappet or solid flat tappet cams only. Flattop or dished piston only. Stock OEM or spec steel heads. Heads may be milled, but no porting, polishing or grinding allowed. Roller rockers OK. No stud girdles. Valves - 2.02 max intake (except ford clevelands stock), 1.60 max exhaust (except ford clevelands stock). Chevy aftermarket heads include DART pt# 10021070,10021171,10021010,10021111,10024266,10024360, and 10024267; Summit racing pt# sum152123; IMCA/EQ sport mod head ch350i; WORLD PROD. pt# 043600, 043600-1, 043600-2, 043610, 043610-1, and 043610-2. Ford aftermarket heads include World Products Windsor Jr. #053030-2

IMCA STOCK CAR SPECS:

FRAME: Any American OEM full body rear wheel drive passenger car, 1964 or newer, full frame or unibody. Minimum 107.5 inch wheelbase, maximum one inch difference from side to side. Frame must match body — GM to GM, Ford to Ford, Chrysler to Chrysler — AND wheelbase to wheelbase. Exceptions are: 1980 or newer Ford two door unibody may be installed on 1978-1987 GM full frame OR Ford full frame (shortened to minimum 107.5 inch wheelbase). Chrysler engine may be put in 1978-1987 GM full frame. Rear of frame behind rear tires, no further forward than one inch behind factory seam, may be replaced in OEM location with two inch by three inch steel tubing with 0.095 inch wall thickness. Factory seam must remain visible. Unibody must tie rear frame to front frame. Frame may be “X” braced. No Camaros, Firebirds or Mustangs. Click here to download frame dimensions.

ROLL CAGE: Roll cage must meet IMCA specifications. Main cage must consist of continuous hoops, minimum 1.75 inch O.D. tubing, with a minimum wall thickness of 0.095 inch, low carbon or mild steel recommended. Four-post roll cage required, front down bars and rear hoop must be welded to OEM frame. Driver’s head must not protrude outside cage with helmet on. Rear hoop must have “X” brace, consisting of one full horizontal and one full diagonal bar, minimum 1.25 inch O.D. with 0.083 inch wall thickness. Front down bars must be tied together, passenger side front down bars must be maximum 11 inches in from top of door. Must be minimum 40 inches between outside edge of front and rear down bars at top of door panel. Maximum 41 inches (48 inches for 1988-1996 GM bodies) from top center of windshield to front edge of rear hoop; maximum 13 inches (20 inches for 1988-1996 GM bodies) to front edge of top halo. Top halo must be minimum 40 inches across, outside to outside. Rear hoop may be maximum 12 inches in from bottom of opera window. Minimum one cross bar in top halo. May have maximum two horizontal bars, (in addition to bar tying front frame horns together) for radiator protection; must be behind bumper, within confines of body, no wider than stock frame horns. Required rear kickers (down bars) and engine hoop must be minimum 1.25 inch OD tubing, with 0.083 inch wall thickness. Fuel cell protection required, must be mounted frame rail to frame rail, no higher than fuel cell, inside trunk area with maximum 1.75 inch OD tubing. All bars must be inside body. Foot protection bar required.

DOOR BARS: All door bars and uprights must be minimum 1.75 inch O.D. with 0.095 inch wall thickness. Minimum three door bars, both sides, parallel to ground, and perpendicular to driver. Minimum four uprights tied from frame to top door bar on driver side, and minimum three uprights on passenger side. Steel door plates, 18 gauge or 0.049 inch minimum thickness, must be securely welded to outside of door bars on driver’s side. Plate must cover area from top door bar to frame and from rear down post to five inches in front of seat. Must be visible for inspection.

BODY: Must be IMCA approved, unaltered OEM, and centered over wheel wells (front to rear and side to side). Body and engine make must match. Front body mounts must be visible. May use 1988-1996 Cutlass, Grand Prix, Lumina, Regal or Monte Carlo body on 1978-1987 GM 108 inch wheelbase full frame. Sunroofs and T-tops must be enclosed. OEM or aftermarket plastic nose and tail pieces allowed (recommended to match body). All body panels may be gutted, including fenders, doors, hood, roof, quarters and trunk, but must remain original size. No overlapping or shortening of body panels. Hood must be separate from fenders, in OEM location, with rear sealed off from driver compartment with metal. All inner wheel wells may be removed. Rear edge of trunk may be trimmed and rear tail light support removed only if aftermarket tail piece is used. Trunk floor must be removed over rear end housing, entire trunk floor may be removed. All windows must remain open, except opera windows may be covered with clear lexan, no decals. All ‘B’ pillars may be trimmed to minimum 2 inch width, must remain within OEM location. Maximum seven inch metal sun visor may be added to top of windshield opening. Wheel wells may be trimmed for tire clearance. No spoilers, hood scoops or reflective body panels. Rocker skirt/flare allowed between tires only, cannot extend outside tires, minimum 4 inch ground clearance.

DRIVER COMPARTMENT: Minimum of three windshield bars in front of driver. Aluminum high-back seat only, must be bolted in using minimum 0.375 inch bolts. Seat must remain inside all confines of roll cage. Driver must be sealed off from track, driveline, engine and fuel cell. Kick and rocker panels may be removed. Front OEM firewall may be replaced using steel fabricated firewall, 18 gauge or minimum 0.049 inch thickness. Top of firewall can be no further back than 12 inches from the back of engine block, measured horizontally. Bottom of firewall can be no further back than rear of oval body mount frame hole. Dash must not extend more than 24 inches back from top of firewall. Dash must be flat, rear can be no higher than front, except for cowl in front of driver. OEM floor pan may be replaced using steel fabricated floor pan, 18 gauge or minimum 0.049 inch thickness, securely welded to frame. Floor pan may be replaced from front firewall to rear halo supports. Must remain flat/OEM appearing from frame rail to frame rail, can be no higher or lower than frame rail. Exception is maximum 8-inch tall driveshaft tunnel. Tunnel must remain similar to OEM tunnel in size. No cockpits, interior must remain open. Rear firewall may be aluminum or steel and may be located no further forward than rear halo supports and no higher than bottom of rear opera windows. All holes in firewalls must be covered with metal. No driver-adjustable devices allowed while car is in competition except brake adjuster. No mirrors.

FRONT SUSPENSION: All components and mounts must be steel, unaltered OEM, in OEM location and match frame. Rubber, nylon or steel lower A-frame bushings only - no offset or bearing type. No sway bars. Exceptions are: weight jacks allowed - must be in original centerline of spring tower; OEM upper A-frame mount may be moved or replaced with aftermarket steel non-adjustable mount matching upper A-frame bolt on design; OEM or OEM replacement ball joints allowed. For 1978-1987 GM mid-sized metric frame, OEM upper A-frame may be replaced using aftermarket upper A-frame, must display “IMCA approved” decal on top of rear tube of A-frame. Shock location may be moved and may go through center of aftermarket upper A-frame, but frame cannot be altered in any way. Single hole shock mounts only.

STEERING: No rack and pinion. All components must be steel, unaltered OEM, in OEM location and match frame. Exceptions are: bolt on spindle savers allowed, OEM steering column may be replaced with steel knuckles and steel steering shafts (collapsible recommended). Quick release required - steering quickener and steering wheel may be aluminum.

SHOCKS: One steel nonadjustable unaltered shock per wheel. No coil over, air, or remote reservoir shocks. No Schrader or bladder type valve allowed. No coil over eliminators. One or all shocks may be claimed per event for $50 each, counting as one claim on card, following shock claim procedures (Refer to IMCA Operations and Inspection Manual or General Rules).

SPRINGS: One steel spring per wheel only. All coil springs must be minimum 4.5 inches O.D. and non-progressive.

REAR SUSPENSION: All components and mounts must be steel, unaltered OEM, in OEM location, and match frame. No independent rear suspension. Rubber or nylon control arm bushings only, no offset or bearing type. Welded single-hole shock mounts only. Exceptions are: coil springs may be moved, but center line of axle tube can be no further forward than the front of spring, or no further back than rear of spring; shocks may be moved, but must remain behind housing; lower control arm mounts on rear end may have multiple holes (maximum of five) for adjustment. Upper control arm mounts on rear end must be level with each other.

REAR END: Any steel approved OEM passenger car or truck non-cambered rear end (housing and carrier) allowed. Safety hubs (floater) allowed. No sway/panhard bars. All components must be steel, exceptions are: lowering blocks, axle cap, and drive flange may be aluminum. No adjustable lowering blocks. One inch inspection hole in housing required. Full steel spool, steel mini spool or welded rear end only. Steel axles only. No quick change devices. One piece drive flange only. No torque-dividing differentials. No scalloped ring gears.

BUMPERS/RUB RAILS: Maximum one inch wide by two inch tall steel or lexan rub rails allowed - bolted flush to body. Front and rear tow hooks mandatory. All front bumpers must be mounted minimum six inches from front frame horns. Steel bumper mounts only. No sharp edges allowed on bumpers, rub rails or bolts. One of two bumper options must be used and must be OEM height.
OEM: Bumpers not covered by plastic nose or tail piece must be complete, unaltered OEM, capped to fender with steel, welded or bolted. No bars past outside edge of body other than rub rails.
Aftermarket: Fabricated tubular bumpers allowed, but must be covered by plastic nose or tail piece and bent to fit with rounded ends. Main bumper bar must be minimum 1.5 inch O.D. (maximum two inch) with 0.083 inch (maximum 0.125 inch) wall thickness on front, and 1.75 inch O.D. with 0.120 inch wall thickness on rear.

TIRES/WHEELS: Must use unaltered Hoosier Race tire, G60-15 with IMCA stamped on sidewall. No chemical softening, conditioning, or grooving of tires (Refer to IMCA Operations and Inspection Manual or General Rules for automatic penalties). Tires may be ground or siped within confines of tread (not past factory straight line). No re-caps. All wheels must display white “IMCA approved” decal and wheel manufacturer decal. Spacer or offset wheel, or a combination of the two allowed, but cannot exceed two inches total offset per wheel. May use IMCA approved bead lock, on right rear only. External, steel bead lock only and it cannot make wheel any narrower than 8 inches and no wider than 8.75 inches. Steel bolts only. Foam type or plastic outer mud cover allowed on right side wheels. Inner mud cover allowed on left rear only. No bleeder valves.

BRAKES: Steel, unaltered OEM, or unaltered OEM replacement, operative four wheel, drum or disc allowed. Front components must match frame and maintain minimum OEM dimensions for hubs/rotors and calipers, cannot be lightened. OEM diameter caliper pistons only. Bolt pattern may be changed. Larger studs allowed. Vented rotors only, no scalloped or ceramic coated rotors. Rear rotors may be aftermarket 0.810 inch thick (new). No floating brakes. No brake shut-off or pressure sensitive devices. One front to rear proportioning device allowed. Brake lines must be visible. Aftermarket pedal assembly allowed.

EXHAUST: Round tube headers only. All primary header tubes must enter directly into one collector at same point at end of header. Must remain dual exhaust, no crossover or “Y” pipes. No exhaust through body panels or fenders. Schoenfeld mufflers, stamped IMCA609, must be used if track has noise reduction rule of 98 d.b. or more. All exhaust must go through muffler, two per car, one per header. No merge collectors. No exhaust sensors.

FUEL SYSTEM: Mechanical OEM type push rod fuel pumps only. Racing fuel cell required, maximum 22 gallon, must be in minimum 20 gauge steel container. Must be securely fastened in trunk above top of rear frame rails, behind rear tires, no further forward than factory seam where rear frame rail can be replaced, with minimum two solid steel straps around entire cell, two inches wide and 0.125 inch thick. No fuel cells allowed over rear end housing. Metal firewall must be between driver and fuel cell. All cell mounts must be steel, securely welded to frame/cage. No adjustable fuel cell mounts. Fuel cell vents, including cap vent, must have check valves. If fuel cell does not have aircraft style positive seal filler neck/cap system - a flapper, spring or ball type filler rollover valve is required. Fuel lines through driver compartment must run through metal pipe or metal conduit. One fuel filter only, cannot be in driver’s compartment. No cool cans. Air cleaner top/stud cannot direct air into carburetor. No top flow air cleaner housings, cold air boxes or air cleaner duct work. Must use unaltered 350 c.f.m. Holley - part no. 0-80787-1- with no modifications, or part no. 0-7448 which may be modified to meet the specs of part no. 0-80787-1. Holley carburetor components only. Any driver caught with non-350 Holley will be fined $500 or suspended for two weeks. Air bleeds cannot be removed, .076 inch maximum diameter. Float bowl must face forward. Carburetor adapter/spacer allowed, maximum 1.20 inches thick, including gaskets. Carburetor may be exchanged, following same procedure as engine claim. Driver claiming carburetor may not claim engine or shocks on same night.

FUEL: Gasoline only. Racing fuel allowed. No E85. No performance enhancing or scented additives. Fuel must pass both dielectric meter and chemical tests (Refer to IMCA Operations and Inspection Manual or www.imca for automatic penalties).

WEIGHT: Track option to enforce a minimum weight limit of 2,950 pounds, after race with driver in car. No tolerance. No weights and/or loose objects in driver compartment or outside body and must not be visible. Weights must be securely mounted to frame or roll cage and painted white with car number on it. Must be attached with at least two 0.5 inch bolts. No titanium, magnesium or carbon fiber products. No gun-drilled, tubular, hollow bolts or studs. Steel fasteners only.

BATTERY/STARTER: One 12 volt battery only, must be securely mounted between frame rails, and positive terminal must be covered. Battery must be in Marine type case if mounted in driver compartment. Starter must bolt in OEM location. Car must have capability of starting without being pushed or pulled. Car must leave initial staging area on demand, unaided, or go to rear of that race.

GAUGES/ELECTRONICS: No unapproved cameras, transmitting or listening devices. No timing retard controls, or digital gauges (including tach). No electronic monitoring computer devices capable of storing or transmitting information except analog tach. No adjustable ignition control boxes. Only one 12 volt ignition box allowed, must be out of driver’s reach. No additional ignition accessories. Only change allowed to ignition box is one high-end rev-limiter. Setting can be changed through one chip only, or an internal setting inside box. No magnetos or crank triggers. OEM type alternator with internal regulator allowed. No electronic traction control devices (Refer to IMCA Operations and Inspection Manual or General Rules for automatic penalties).

TRANSMISSION/DRIVE SHAFT: Must have at least two forward gears and one reverse, plus neutral position. With motor running and car in still position, must be able to engage car in gear and move forward, then backward. Only OEM production type transmissions allowed - two speed, three speed, four speed and automatic. No five speed (or more) transmissions, “in and out” boxes, or quick change devices allowed. Functioning shift levers must be in OEM location. Flywheel/flexplate must be bolted directly to end of crankshaft, and pressure plate must be bolted directly to flywheel/flexplate. One flywheel/flexplate only, and all driveline components within bellhousing must rotate consistent with engine RPM while car is in any gear. Unaltered flexplate must be full OEM, or OEM replacement.
Manual: Must be OEM or OEM replacement case and have a working 7.25 inch minimum diameter, steel and/or aluminum, single or multi-disc clutch inside explosion-proof steel bellhousing - minimum 270 degrees around top of clutch/flywheel area.
Automatic: Must remain in OEM or OEM replacement case, with a functioning OEM appearing pump. Aluminum OEM bellhousing may be replaced with aftermarket explosion-proof aluminum bellhousing. Original OEM bellhousing must have approved scattershield constructed of minimum 0.125 inch by three inch steel, 270 degrees around flexplate. Manual bump starts allowed.
Drive Shaft: Minimum two inch diameter steel drive shaft, must be painted white. Steel slip-yokes only. 360-degree drive shaft loop required and must be constructed of at least 0.25 inch by two inch steel, or one inch tubing, mounted six inches back from front U-joint.

ENGINE COMPARTMENT: Engine must be in OEM location. On 1978-1987 GM frame and engine, center of GM fuel pump must be located minimum 1.75 inches in front of cross member (measured at frame). Engine setback on Ford and Chrysler engines in 1978-1987 GM frame TBA. Ford metric frames must have back of fuel pump in front of cross member. V-6 engine must be in OEM location. Frame and cross member may not be altered for GM engine placement. Engine mount holes cannot be removed or altered on block. Aftermarket engine mounts allowed, including mid-plate. Engine must be OEM appearing, must be able to be used in conventional passenger car without alteration. GM with GM, Ford with Ford, Chrysler with Chrysler (see exceptions). Radiator must be mounted in front of engine. Cooling system may be modified. Overflow tubes must be directed to ground.

ENGINE SPECIFICATIONS: Any American make engine allowed. Steel heads, block and oil pan only. OEM passenger vehicle production block only. No GM Bowtie, Ford SVO or Chrysler W blocks. Castings and fittings cannot be changed, no machine work on outside of engine. No cubic inch limit. Full roller rocker arms allowed. No stud girdles. Flat tappet cam/lifters only, cannot alter lifter bores. No mushroom lifters.
INTAKE: Unaltered, approved OEM cast iron low rise, two- or four-barrel. Only aftermarket aluminum intakes allowed are: Weiand GM #7547-1; Ford #7515, #8023 or #7516; Chrysler #7545; Edelbrock GM #2701, #2716; Ford #7121, #7181, #7183; Chrysler #2915. No porting or polishing allowed to any intake. Cooling lines allowed on aluminum intakes. Disqualification, loss of points, purse and $250 fine if any alterations are found to intake. No bow tie or high rise intakes. OEM firing order cannot be changed (GM: 1-8-4-3-6-5-7-2). Steel or aluminum water pumps allowed. No electric water pumps allowed. ‘Wet’ sump oiling system only. Accumulator allowed – cannot be located between seat and door bars.

END FACTORY STOCK RULES

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General rules and procedures for IMCA classes

These rules may be updated at any time by IMCA, it is recommended that you visit the official website for the latest.

www.imca.com

Download Rules PDF

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants
are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.
The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

DEFINITIONS
1. IMCA - Shall have the power to make and construe rules regarding the Association.
2. Promoter - Person, firm, organization or corporation in whose name a franchise is issued authorizing the staging of race meets. Acts as the Official Representative of the Association at sanctioned races.
3. Technical Inspector - Appointed by IMCA or promoter to pass upon the classification and eligibility of race cars.
4. Driver - Person who is engaged in the driving of race cars in sanctioned race meetings. Must be physically fit and able to pass a test of ability when requested to do so by an official of IMCA. Must be currently registered with the Association prior to participating.
5. Race Official - Any person connected with the staging of race meetings, appointed by and under the direction of promoter.
6. OEM - Original Equipment Manufacture. OEM Products are those built specifically by, or for, major automotive manufacturers. (IE - Ford, Chrysler, General Motors.)
7. OEM Replacement — Any part manufactured and distributed by someone other than the original equipment manufacturer, or original manufacturer’s supplier of the OEM part, which matches minimum OEM specifications for dimension, weight, design, material composition, configuration and function of the OEM part for which it is represented to be a replacement part.
8. EIRI - Except In Rare Instances. Decisions of IMCA officials are final and binding without exception. In some cases, track procedural or safety rules may take precedence over IMCA rules - discrepancy between IMCA and track rules should be brought to the attention of IMCA.
9. O.D. - Outside Diameter.
10. IMCA Approved - See below for parts approval policy.

RACE DRIVER LICENSE
1. Issuance of race driver’s license by IMCA binds driver by rules as set forth by IMCA, and such rules as may be added during the season. Ignorance of rules is no excuse for infraction thereof. A copy of IMCA rules will be issued to each licensee and he/she is required to read and be familiar with the rules herein. In acceptance of the license he/she agrees to comply with all IMCA rules. IMCA reserves the right to refuse issuance of a license, and further reserves the right to revoke a license if and when deemed necessary.
2. Any person competing in an IMCA event must be a licensee in good standing with IMCA. Non-licensed drivers may not participate. License fees for 2008 are as follows: IMCA Modified - $115; IMCA Late Model - $135; IMCA Sprint Car - $135; IMCA Stock Car - $95; IMCA SportMod™ - $90; IMCA Crate Model - $90; IMCA Hobby Stock - $85; IMCA Sport Compact - $60. These fees will be discounted $5 if purchased directly through the IMCA office.
3. ROOKIE STATUS: To be considered a rookie in any division, driver must not have previously participated in any more than four IMCA sanctioned races in that division. Driver may not drop down a division and still be considered a rookie - progression of order is as follows: Sport Compact, Hobby Stock, SportMod™, Crate Model, Stock Car, Modified, Sprint Car, Late Model.
4. All licenses will be issued by IMCA only, but application thereof can be made with local track officials. An applicant for license will be allowed to compete with receipt of payment for license only until such time as IMCA issues regular license.
5. Any IMCA member who allows anyone to use, or attempt to use, or any member who uses, or attempts to use, another member’s license and/or claim card, will be subject to loss of all points, and/or fine or suspension.
6. IMPORTANT - Participants are not employees of IMCA but are independent contractors and assume all responsibility for all charges, premiums and taxes, if any, payable on any funds they may receive as a result of their participation in any events as drivers of IMCA.
7. IMCA drivers will be paid all monies and must furnish IMCA with their valid Social Security Number. Failure to furnish valid Social Security Number, or furnishing false Social Security Number, may result in fine and/or suspension.
8. If proof of driving ability of any applicant is deemed necessary, tests shall be conducted at the discretion of track officials and their decision shall be binding on the applicant. When deemed necessary, officials may insist on a physical examination of any applicant or license holder.
9. Drivers under 18 years of age are required to submit to IMCA a NOTARIZED parental consent form - signed by both parents or legal guardians - and a copy of birth certificate, prior to competition. Drivers in the Sport Compact, Hobby Stock, and SportMod divisions must be at least 14 years of age, and drivers 14 or 15 years of age must also furnish a recap of their racing experience, and a list of tracks at which they will be competing. Drivers 14 or 15 years of age wishing to compete in the Stock Car, Crate Model and Modified divisions must submit all forms, and licenses will be issued at the discretion of IMCA. These forms are available for $50 processing fee from IMCA and must be received in the IMCA office and approved prior to any competition - NO EXCEPTIONS. No drivers under the age of 16 will be allowed to compete in the Sprint Car or Late Model divisions.
10. The valid period of the license is from the date of issue until December 31 of the year in which license was issued. All licenses become due and payable on January 1 of each year. IMCA emblems and decals will be furnished to each licensee, as well as Inside IMCA, the official monthly newsletter of IMCA.
11. All current members receive a $5,000 accidental death, dismemberment and paralysis insurance policy, effective from date of license through December 31. Also included will be a $50,000 excess medical policy. This will pay up to $50,000 after a driver’s personal policy and the track’s policy have been exhausted. These policies will cover a current member only while participating in an IMCA sanctioned race and to and from the IMCA track.
12. IMCA and its promoters and sponsors reserve the right to use photos of any licensee or their car for promotional purposes.

GENERAL RULES
1. All IMCA rules apply at all IMCA sanctioned events. IMCA members agree to abide by the official decisions.
2. Any rule amendments that are published during the course of the season in Inside IMCA, the official newsletter of IMCA, will be amended on www.imca.com and will be considered a part of the rules and all personnel are responsible for carrying out these rules.
3.Track officials shall have responsibility for rules and regulation enforcement at IMCA weekly sanctioned events. At discretion of track official(s) in charge, any competitor may be disqualified for rule violations, hazardous equipment or hazardous actions. All disputes developing as a result of local track rules must be settled at the track.
4. No driver or crew member may enter the racing area until he/she has completed all releases, registrations and/or entry forms. No person will be allowed to sign release and waiver sheets for anyone other than themselves.
5. Consumption of alcoholic beverage by driver or his/her crew in advance of, or while competing in any IMCA sanctioned program is strictly forbidden. Any driver showing evidence of alcohol consumption will be required to leave the premises immediately and may be subject to a fine of no less than $250. Use of illegal drugs at any time shall be cause for immediate, indefinite suspension and/or fine of no less than $250.
6. No driver changes will be made at any time without previous notification of officials. All changes must be made in the pits only, at discretion of officials.
7. The driver is qualified and receives points, not the race car. Any driver wishing to change cars must be qualified to compete in the race for which he/she is changing cars, and must start at the rear of that race. Once a driver has changed race cars, he/she must finish the program in that race car. NOTE: This rule does not apply if a track has a policy prohibiting driver changes. Drivers changing race cars are not eligible for provisional position. Drivers changing cars or provisional drivers cannot claim. Once race cars are staged, no driver changes allowed. Any driver allowing another driver to use his/her race car, or any driver changing cars when not qualified to do so, forfeits any points earned in that event.
8. No IMCA member shall participate in any fight on the premises, or take part or participate in any action or activity considered detrimental to IMCA racing.
9. No IMCA member shall subject officials to abuse or improper language.
10. Driver is sole spokesman for car owner and pit crew in any and all matters pertaining to the race and the driver only shall take part in any arbitration with the officials.
11.Driver is responsible for the conduct and actions of their crew members. Unsportsmanlike conduct by drivers, owners and/or pit crews shall be grounds for disqualification and/or punitive action by IMCA.
12. IMCA and promoter reserve the right to inspect race car at any time. They further reserve the right to disqualify any driver and race car from competition and confiscate any and all illegal parts. It is the responsibility of the driver and crew to disassemble race car for inspection when requested to do so. Refusal to comply will result in disqualification and forfeiture of prize money and points and may be subject to fine and/or suspension.
13. Approval of a race car by inspector shall mean only that it is approved for participation in a competitive event and shall not be construed in any way to mean that it is guaranteed mechanically sound, safe, or completely legal. IMCA and/or the inspector shall not be liable for any mechanical failure nor for any losses, injuries or death resulting from same.
14. Any car, under protest or claim, taken from premises without first clearing with official in charge will subject car and driver to disqualification and forfeiture of prize money and points.
15. Any driver or race car under suspension may not participate in any IMCA event.
16. No driver, car owner, or mechanic shall have claim for damages, expenses or otherwise against IMCA, promoter, or any officials, by reason of disqualification, confiscation, or damage to, either race car or driver or both; and car owner, driver and mechanics agree the track is in safe condition if they take part in racing activities.
17. All drivers, car owners and mechanics assume full responsibility for any and all injuries sustained including death and property damage, at any time they are on the premises, or en route to or from the premises.

PRODUCT APPROVAL POLICY
1. Any manufacturer seeking approval should send the product to: IMCA, 1800 West D Street in Vinton, Iowa, 52349.
2. If those parts are determined to conform to the IMCA rules, the manufacturer will be notified in writing by IMCA.
3. Manufacturers should be prepared to answer questions which may arise and should understand that, whether deemed legal or not, the product will be retained by IMCA to be used as a standard, should any questions arise during competition about whether or not the product conforms or has been modified to where it no longer conforms to the rules.
4. Where a product is determined not to conform to IMCA rules, IMCA will explain why the product was non-conforming.
5. Questions about whether or not a product has been approved may be e-mailed to raceimca@imca.com, or sent by letter, addressed to IMCA.

PROTESTS
1. Protest must be in writing and filed with promoter within a reasonable time, at discretion of officials, after feature race is completed, and must be specific in alleged violation to determine whether protest is allowed or rejected. No protest of any type will be allowed after prize money has been paid. One item per protest - per event - only. Drivers may not protest more than one car per event, another driver finishing in a position behind them, and may not protest same driver more than once per calendar year.
2. All protests will be handled at track level and must be accompanied with a $150 cash deposit. $50 of the deposit goes to the track and will not be refunded, regardless of the outcome of the protest. If item being protested is found legal, entire deposit will be forfeited. If found illegal, $100 deposit will be refunded to protester.
3. Any situation not covered by these rules shall be referred to IMCA for decision. This protest must also be in writing and accompanied by deposit.
4. The party against whom a protest is made has a right to know the charge and have a written copy thereof so that they may adequately defend themselves against any action. No person, promoter, official, member or other person affiliated with IMCA will be placed under permanent suspension without review by IMCA.

AUTOMATIC PENALTIES
1. Electronic traction control device: Automatic disqualification and $10,000 fine. If found with an electronic traction control device at any point during an IMCA sanctioned event, driver loses all IMCA points in all divisions and is suspended until fine is paid. Device may be confiscated and retained by IMCA.
2. IMCA reserves the right to have all race cars use the same fuel or fuel mix. Fuel sample may be taken from any car at any time. Penalty for illegal fuel is disqualification from event and $250 fine - first offense. WARNING - ethanol blended fuel may not pass IMCA fuel tests.
3. Use of non-stamped or softened tires in any division requiring IMCA stamped tires will result in a $250 fine for first offense; $250 fine and two week suspension for second offense; $500 fine and 30-day suspension for third. When prohibited, use of siped or grooved tires or non-stickered wheel will result in disqualification and loss of points and pay for first offense; $250 fine and two week suspension, disqualification and loss of points and pay for second offense; $500 fine and 30-day suspension, disqualification and loss of points and pay for third.
4. Fighting and/or physical assault: First violation, minimum $250 fine and/or suspension. Second violation is a minimum $500 fine and minimum two-week suspension. Third violation is a minimum one-year suspension.
5. Unsportsmanlike conduct and/or verbal assault: First violation, minimum $100 fine and/or suspension. Second violation is a minimum $250 fine and minimum two-week suspension. Third violation is a minimum one-year suspension.
6. Rough driving - Penalties including fines, suspensions and points to be at discretion of track officials, and IMCA may impose penalties based on severity of incident.
7. Any driver intentionally using his/her vehicle in a malicious manner: minimum $250 fine and/or suspension at discretion of officials and IMCA.
8. Physical assault of an IMCA or track official, or promoter. First violation is a fine of no less than $1,000 and/or suspension of driver of no less than 21 days.
9. Repeated violations of IMCA rules may result in permanent suspension. All incidents will be referred to IMCA by promoter, with his/her recommended penalties. All penalties imposed by IMCA are cumulative, not on a per-year basis.

RACE PROCEDURES
1. The number of cars starting a race is determined by the track officials and depends on the type of event, width, length and condition of track.
2. Race car must display number as assigned by track personnel. It must be minimum four inches thick and 20 inches tall and clearly visible, on both sides, top and back of car, and front, if possible. Recommended that no holographic or reflective numbers be used. All race cars must display the official IMCA decal and required contingency decals, which will be furnished by IMCA.
3. Promoter and IMCA officials will not be responsible for allowing a late entry to compete. Rejection of entrants at any given time is allowed but pit gate closing time should be known to all competitors.
4. Any driver not ready to compete when called may be sent to rear of starting line-up, or left out of balance of program at discretion of official in charge.
5. Once a race is started on a preliminary line-up lap, disposition of cars not in position shall be at discretion of officials.
6. A race may be stopped at discretion of officials at any time, if considered dangerous to continue, but only officials have the right to stop a race. No driver, car owner, pit man or mechanic may use starter’s flags for purpose of signaling competitors.
7. If track has pre- or post-race inspection, those drivers not reporting to the inspection area may be disqualified and given last place points.
8. No race is official until officials make declaration of final scoring of positions.
9. No race car is to receive assistance after white flag is displayed and all finishes must be made under car’s own power or momentum.
10. A dead heat may or may not be re-run at discretion of officials. If dead heat is not re-run, prize money and points for both positions under contention shall be divided equally.
11. No person shall be allowed on track during a race except officials.

LINE-UP PROCEDURES (Unless otherwise noted, these procedures apply to all IMCA divisions.)
1. First night, all drivers draw for heats. Qualifiers redraw for starting positions. One heat - 5 redraw; two or five heats - 10 redraw; three, four or six heats - 12 redraw. SPECIAL NOTE: IMCA late models draw first two nights.
2. From second night on, heats are lined up by season IMCA point average, stagger inverted, lowest point average to front, highest point average to rear. New drivers carrying no point average start at the rear. Two or more drivers having no average or same point average will be lined up at discretion of officials. Point averages are figured from IMCA point system. Average is figured by driver’s track IMCA point total divided by the total number of times he/she has competed at track.
3. “B” mains are lined up straight up from heats with highest finishers to front.
4. When one heat is run, top five qualifiers will be inverted for feature lineup according to season IMCA point average. When two or five heats are run, the top 10 qualifiers will be inverted for feature lineup according to season IMCA point average. When three, four or six heats are run, top 12 qualifiers will be inverted for feature according to season IMCA point average. IMCA and promoter reserve the right to relocate a driver from an invert position to the rear of the field if deemed necessary for the safety and well-being of all involved. Remainder of “A” feature is lined up straight up from heats and/or “B” features. SPECIAL NOTE: IMCA late models - 18 or more cars will require at least three heats. (Half-mile tracks have the option of not using three heats until there are 22 or more cars.)
5. A driver that qualifies but has no point average shall be lined up in last invert position. Should there be more than one driver with no point average, positions will be lined up at discretion of officials.
6. If a driver is absent for two consecutive events (excluding rain-outs), upon his/her return shall be treated as a new car (rule #5) for the first week he/she returns.
7. There are no double feature nights allowed, excluding rainout make-up features. A program is not considered a rainout unless all qualifying races have been completed and feature lineup is complete. If feature is rained out and will not be run at later date, all drivers are to be awarded last place points.
8. Track option to line up mid-season and season championships straight up by total points.
9. Track may have two programs, other than opening night, where a draw-redraw system may be used for line up. Must be requested in writing and approved by IMCA at least 30 days prior to race.

POINT STRUCTURE (Unless otherwise noted, this point structure applies to all IMCA divisions.)
1. Weekly ‘A’ Feature win is 40 points, with each subsequent position worth one point less, with 24th position in feature worth 17 points. If more than 24 cars start feature, all positions from 24th back receive 17 points. If track runs a ‘B’ feature(s), first non-transferring driver receives 16 points and each subsequent position, back to sixth position, receives one less point per position. Sixth position and back in ‘B’ feature(s) receive 11 points. This applies to all ‘B’s, even if more than one is run. Drivers that don’t qualify for ‘A’ or ‘B’ feature will receive no points, but that event will not be figured into driver’s point average. (IMCA Late Models — heat points are awarded as follows: 1st - 3 points; 2nd - 2 points; 3rd - 1 point.)
2. Should a driver qualify for ‘B’ feature or ‘A’ feature, and not be able to compete, they will be scored in last position and receive points accordingly. (Promoter’s discretion whether vacated position is filled in feature by next qualified driver.)
3. If less than ten entries for any given night, for each car less than ten, one point fewer than normal is awarded for feature finish. For example, if nine cars entered, feature win would then be worth 39 points; for eight entries, win would be worth 38 points, etc.
4. Driver must participate at minimum 50% of weekly sanctioned point events at a track to be eligible for IMCA track point fund. Track must complete at least four race programs to crown a champion.
5. TRACK standings are based on driver’s total cumulative points at that track.
6. STATE standings are based on driver’s total cumulative points for first 55 sanctioned events at tracks located in that state.
7. REGIONAL and NATIONAL standings for 2009: Modified, Stock Car, Hobby Stock and SportMod™ drivers will use their BEST 30 finishes at their FIRST 55 starts at sanctioned events in their region to determine their regional and national standings. Crate Models, Late Models and Sprint Cars will use their BEST 20 finishes at their FIRST 55 starts. (Non-point disqualifications will not be included in 55 starts).
8. SERIES standings for 2009: Must be a minimum of eight races in the series to award bonus points – maximum of 20.
9. NATIONAL standings are based on driver’s regional standings (if division has regions). Driver may cross regional boundaries and receive ‘home’ region points at specified IMCA special events.
10.BONUS POINTS: A bonus will be awarded for winning a track championship, one per division per track. One bonus point will be awarded per each track’s average car count in that division. For example, if a track averages 15 cars, the track champion will be awarded 15 bonus points; if a track averages 25 cars, the bonus is 25 points; if a track averages 38 cars, the bonus is 38 points, etc. Bonus points will be ADDED to the driver’s year end point total (they will not replace finishes). Driver is awarded one track championship for bonus points in the Late Model, Sprint Car, Crate Model and Sport Compact divisions (if a driver gets more than one track championship, the highest number is used). All track championship bonuses will be awarded in Modifieds, Stock Cars, SportMod™, and Hobby Stocks, with a maximum of 60 cumulative bonus points. Should a track run more than one feature per division, the average number of cars per feature event will be used to figure bonus. A track must complete at least eight race programs for full bonus point structure to apply; bonus will be pro-rated for track with between four and seven events.
11.TIE-BREAKER: Should two or more drivers have the same point totals at season end in track, series, state, regional or national standings, number of sanctioned 40-point feature wins will decide tie-breaker, then second-place finishes, etc.
12.The 2009 point season for Late Models is April 24 through August 30; for all other divisions the point season is from January 2 through September 27. There are no IMCA points awarded Super Nationals week - September 7-13.

ALL CLAIM PROCEDURES: (Dollar amounts and items not included with claim, can be found in each division’s rules.)
1. Any driver that finished in the top 20 in point standings at that track the previous year is eligible to claim opening night. Driver must have been at track on opening night to claim second night. Following that, no driver may claim unless they competed at that track the two previous consecutive sanctioned track point events.
2. Driver allowed only one claim per event, regardless of claim outcome. Driver claiming engine cannot claim shocks or carburetor on same night. No driver may claim same driver’s engine more than once, shocks more than once, or carburetor more than once during current calendar year. Driver being claimed is subject to only one claim per event. If multiple claims are made on same driver, engine claim takes precedence over shock and carburetor claim. Shock claim takes precedence over carburetor claim.
3. Top four finishers must report directly to claim area and are subject to claim by any other driver finishing fifth on back in feature that is scored on the lead lap. Should one (or more) of the top four finishers be disqualified, fifth place driver is NOT eligible to be claimed, nor can he/she claim another driver in that event.
4. Failure to report directly to claim area will result in disqualification and loss of money and points for first infraction (all items are still claimable); will be treated as engine claim refusal for second infraction. (Exception: If car is involved in accident or rendered unable to report directly to claim area. Car should be taken to claim area.)
5. Driver making claim must drive immediately after feature, under own power, directly to claim area. Driver must have correct amount of cash, current IMCA License and claim card on person. Driver may not claim using receipt.
6. Claim must be made to official immediately after feature. Highly recommended only involved drivers and officials allowed in claim area, and drivers remain in cars. No communication of any kind between drivers and anyone outside claim area.
7. Only driver may claim and only driver may agree to sell or refuse. In case of multiple claims on same item, drawing will be held to determine outcome. Claim is not charged to drivers not awarded item. If first eligible driver withdraws claim, next eligible driver will be awarded claim.
8. Once claim has been made and accepted, engine is not to be started and car is to be pushed where removal will occur (both cars are to be pushed when exchange is in effect).
9. Should any driver voluntarily withdraw a legal cash engine claim, they will be charged with the claim and fined $200. If exchange option is chosen by claimed driver, claiming driver can not withdraw claim, if so, it will be treated as engine claim refusal.
10. All claimed items must be removed at track. Claimed items must be removed within a reasonable amount of time, at discretion of track officials.
11. Any sabotage discovered while removing claimed engine will result in same penalties as engine claim refusal in that division. Drivers are accountable for any sabotage, and will be responsible for all penalties as a result of sabotage. Claim will be disallowed and money returned to claimer.
12. Disqualification of claimed or claiming driver will not affect legal claim. Claimed item will be removed and transferred prior to any penalties being assessed.
13. Unsportsmanlike conduct during any claim procedure will result in an immediate minimum $100 fine and/or suspension.
14. Promoter may claim, for proper dollar amount, any claimable item at any time, unless that driver has made a legal claim in that event. Any promoter directly affiliated with an IMCA car in competition (at their track) forfeits right of promoter claim. Driver claim takes precedence over promoter claim.
15. During any cash claim, all claimable items should be inspected for legality prior to transfer of items. If claimed item is found illegal, driver is disqualified. Claimer then has option to accept or decline claim. If declined, claim is not charged on card. Additional penalties may apply, depending on infraction.
16. During any exchange claim, both items exchanged must be legal. If any claimed item is found illegal, driver with illegal item is disqualified. Driver with legal item has option to accept or decline claim. Additional penalties may apply, depending on infraction.
17. IMCA reserves right to refuse issuance of claim card, to revoke claim card and claiming privileges, or deny any claim if and when deemed necessary. IMCA reserves right to claim, for proper dollar amount, any claimable item at any time.

CLAIM REFUSAL
1. Refusal to sell any claimable item forfeits all cash, trophies and contingencies for feature and all IMCA points in all claim divisions for calendar year.
2. Any driver refusing a claim, when claimed within rules, regardless of reinstatement with IMCA, loses right to claim any other IMCA driver for 12 calendar months from reinstatement date.
3. First refusal will also result in driver being suspended for 30 calendar days from IMCA events in all claim divisions from refusal date and until proper cash fine is paid to IMCA. Second refusal will result in driver being suspended from IMCA events for one year from refusal date and until $5,000 cash fine is paid to IMCA. Third refusal is permanent suspension from IMCA.
4. Engine refusal fine – Sport Compacts, Hobby Stocks, Northern and Southern SportMods $1000; Stock Cars $1,500; Modified and Sprint Car $2,000. Shock and carburetor refusal fines - $1000 in all IMCA divisions.
5. All fines must be a cashier’s check or money order and be received by IMCA prior to driver returning to competition. Track may also suspend car for duration of penalty.
6. Claim is not charged to claiming driver in case of a refusal.

SHOCK CLAIM PROCEDURES: (No driver may claim same driver’s shocks more than once during current calendar year. Driver claiming shocks cannot claim engine or carburetor on same night.)
1. Follow all engine claim procedures and eligibility requirements. Penalty for shock claim refusal is $1,000 and 30-day suspension.
2. IMCA Modifieds, Stock Cars, Crate Models, Northern and Southern SportMods, and Hobby Stocks - Any driver finishing fifth on back in feature that is scored on the lead lap can claim any shock for $50 from any of the top four drivers. One or all shocks may be claimed, counting as one claim.
3. Should any driver voluntarily withdraw a legal shock claim, he/she will be charged with a claim with no penalty.

CARBURETOR CLAIM PROCEDURES: (No driver may claim same driver’s carburetor more than once during current calendar year. Driver claiming carburetor cannot claim engine or shocks on same night.)
1. Follow all engine claim procedures and eligibility requirements. Penalty for carburetor claim refusal is $1,000 and 30-day suspension.
2. IMCA Stock Cars and Northern SportMods™ - Any driver finishing fifth on back in feature that is scored on the lead lap can exchange carburetor with any of the top four drivers. Both carburetors must be inspected and deemed legal prior to exchange. Should either carburetor be illegal, claim is void and driver is disqualified. Northern SportMods exchange must be four-barrel for four-barrel and two-barrel for two-barrel.
3. IMCA Hobby Stocks - Any driver finishing fifth on back in feature that is scored on the lead lap can claim carburetor of any of top four drivers for $50. Claimed carburetor must be inspected prior to removal. If found illegal, claim is void and claimed driver is disqualified.
4. Should any driver voluntarily withdraw a legal carburetor claim, he/she will be charged with a claim with no penalty.

End IMCA General Rules

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Southern SportMod Rules

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View DiagramThe rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants
are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.
The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

Revised November, 2009. Revisions/clarifications are underlined, recommendations are italicized.

Copyright © 2010 IMCA All rights reserved.
No part of this publication may be reproduced, stored, or transmitted in any form, without prior written permission.

2010 Southern SportMod

1. SAFETY EQUIPMENT: Rules apply at all times car is on track. Snell-rated SA2000, SA2005 or SFI 31.1/2005 helmet required. Roll bar padding required in driver compartment (Fire retardant recommended). SFI-approved full fire suit required. Fire retardant gloves, shoes and neck brace (or head and neck restraint) required. Right and left seat head supports required if using head restraint system with no neck collar. Recommended: Fire retardant head sock and underwear; collapsible steering shaft. Driver-side window net required, minimum 16 inch by 20 inch ribbon or mesh style, and must be mounted to roll cage so latch is at top front of window. Minimum three inch (two-inch with head restraint system) wide SFI-approved five point safety belt assembly required (Y-type shoulder harness not allowed), must be mounted securely to roll cage, recommended to be no more than one year old. Kill switch required within easy reach of driver and must be clearly marked ‘OFF’ and ‘ON’.
2. FRAME: 1978-1987 OEM midsize GM metric full frame only. Minimum wheelbase 107-inches, maximum 109-inches, both sides. Frame must be full and complete, cannot be widened, narrowed, shortened, lengthened, or be cut, bent, or altered to change suspension brackets, except upper control arm brackets on front end. All frame bolt holes must remain in OEM location. Front frame horns may be removed in front of steering box. Front frame may be cut for radiator clearance. Frame may be notched for seat clearance. Transmission crossmember mounts may be removed, no further forward than frame welds. Rear of frame, behind upper shock mounts, may be replaced with round, square, or rectangular tubing. No part of frame can be lower than five inches from ground except front crossmember. No other frame alterations allowed. Click here to download frame dimensions.
3. ROLL CAGE: Must consist of continuous hoops, minimum 1.5 inch O.D. tubing, with a minimum wall thickness of.095 inch for main cage. Cages must be steel or chrome-moly. Main cage no further forward than rear of engine and no further back than front edge of rear tire. Four bars, two per side, may extend from main roll cage to main frame points in front of the upper control arms. These bars may have two additional braces per side to the main frame. Six bars may extend from the main cage to the rear. X-bracing is allowed. Driver’s head must not protrude outside cage with helmet on. Roll cage must be securely supported and braced with minimum one cross bar in top halo. All bars forward of cage must be lower than hood.
4. DOOR BARS: Minimum three driver side door bars required, minimum 1.5 inch O.D. and .083 inch wall thickness, must be parallel to ground and perpendicular to driver, and welded to front and rear of roll cage. Minimum two passenger side door bars required, must have at least one cross door bar, horizontal or angled. Steel door plate, 18 gauge or .049-inch.
5. BODY: (See diagram) Must be same width, front to rear, and parallel to OEM frame. Nose panel must be flat with no fins or scoops allowed. Cooling holes allowed. Nose panel may be no wider, or lower than two inches outside of front frame horns. Nose panel must remain within confines of front bumper. Engine compartment must remain open (no side panels). Aluminum or fiberglass hoods allowed, must completely cover top of radiator and engine, extending from nose to interior deck and enclosed at rear. Must have front and rear roof supports. Roof must be fiberglass or aluminum, full size and rounded down in all directions (see diagram). No dished roof allowed. Driver roof hatch allowed. No plastic body panels or filler panels allowed. Must have complete interior deck from side to side, must be aluminum or sheet metal. Quarter panels must remain 90-degrees to ground, maximum 45-degree bend 4-inches from bottom and 2-inches from top of doors and quarters. Rear spoiler may be maximum 8 inches in material height and maximum 67 inches wide. Spoiler may have stiffener, must be 1 inch or more down from top. Maximum 3 spoiler braces allowed, must be mounted in line. Spoiler braces must resemble all aspects of drawing and must be separate from sail panels. No fins, lips or wings allowed.
6. DRIVER COMPARTMENT: Must have minimum three 5/16 inch O.D. windshield bars in front of driver. Aluminum cowl panel in front of driver can be no wider than cockpit. Aluminum high-back seat only, must be securely bolted, using minimum 0.375-inch bolts, to roll cage and support system. Floor pan must be metal or aluminum and cover entire driver compartment. Bottom of seat can be no lower than bottom of frame rail. Driver must be sealed off from track, driveline, engine, fuel cell, cannisters and pumps. No oil coolers allowed in driver compartment. No devices that would enable driver adjustment to alter wheelbase or for weight jacking while car is in competition. No mirrors of any kind.
7. FRONT SUSPENSION: All components must be steel, unaltered OEM, in OEM location, and match frame. No jack bolts allowed. Adjustable spring buckets are allowed. Must use OEM upper and lower A-frames and mounts. OEM upper A-frame may be replaced using aftermarket upper A-frame (steel or aluminum cross shaft allowed), must display “IMCA approved” decal. Upper A-frame mounts may be modified and moved for caster and camber adjustment, but must remain OEM material. Lower A-frame mounts and bolt holes on frame must be in OEM location, mount may be notched for clearance. All A-frame bushings may be aftermarket, but no offset or bearing type. OEM or OEM replacement ball joints allowed, may be tacked in. Sway bars (optional) and brackets must remain OEM.
8. STEERING: All components must be steel, unaltered OEM, in OEM location and match frame. No grinding, lightening or welding on any steering parts. Spindle may be reamed and bolt on spindle savers are allowed. Steel steering shafts and knuckles only. Steering quickener (optional), steering wheel and quick release (required) may be aluminum. Power steering pump and reservoir must remain one unit. Driver compartment steering may be modified, must be kept on left side. No rack and pinion.
9. SHOCKS: One steel shock per wheel only. Shock must be in OEM mounts and location, using OEM style shock. Mounting spacers and weld or screw-on shock ends allowed. No air or coil-over shocks, remote reservoir shocks, Schrader valves or bladder type valve allowed. One or all shocks may be claimed per event for $50 each, counting as one claim on card, following shock claim procedures (Refer to IMCA Operations and Inspection Manual or General Rules).
10. SPRINGS: One steel spring (racing allowed) per wheel only. Minimum 4.5-inches O.D., non-progressive coils only. No torsion bars or air bags.
11. REAR SUSPENSION: All control arms and mounts must be steel, unaltered OEM, in OEM location, and match frame. No jack bolts allowed. Adjustable spring buckets allowed, may be dropped as long as they remain in OEM location. If upper spring cup uses all thread, it must be securely welded to chassis. Lower spring cups must be centered on housing. Control arms may be reinforced, but cannot be shortened or lengthened, must remain OEM length. All control arm bushings may be aftermarket, but no offset or bearing type. Bushings cannot be drilled. No suspension parts may be altered or lightened. No aluminum parts allowed, other than bushings.
12. REAR END: Must use OEM 7.5-inch GM 10 bolt rear end (bracing optional), must remain stock width. No Ford or floater rear end allowed. Housing end, from control arm mount out, may be modified with 3-inch tubing to accept 9” Ford axle. If Ford axles are used, rearend must remain minimum GM width or maximum 3-inches wider. Steel components only. OEM mounts on lower control arms must remain in OEM location on original 7.5-inch tube housing. Aftermarket axles, mini-spools and C-clip eliminators allowed. Locked rear ends only, no torque dividing differentials allowed. No full or aluminum spools allowed. Pinion angle can not be changed. Any gear ratio allowed but housing must remain unaltered. No quick change devices.
13. BUMPERS/RUB RAILS: Steel only. Two bar front bumper and single bar rear bumper must be used on car at all times and welded, or bolted securely using minimum 0.375 inch bolts. Must be maximum 1.50-inch O.D. tubing, .095-inch wall thickness on front and 1.75-inch tubing, .095 wall thickness on rear. Maximum 1.50-inch O.D. tubing, .095-inch wall thickness fuel cell protection bar required, must cover rear and extend past both sides of cell, may be welded to rear bumper. See diagram for bumper heights. Rear bumper may be maximum 6-inches beyond rear deck. All bumpers and rub rails must be capped with no sharp edges. Single bar rub rail from front to rear wheel allowed on each side, no center supports allowed, maximum 1.50-inch O.D. tubing and .095-inch wall thickness, must be mounted to cage at front and rear of rub rail.
14. TIRES/WHEELS: Must use unaltered Hoosier ‘500’ Race tire, with IMCA stamped on sidewall. 27 by 8 by 15 or 26.5 by 8 by 15 ‘stagger tire’ allowed. No chemical softening, conditioning or grooving of tires (Refer to IMCA Operations and Inspection Manual or General Rules for automatic penalties). Tires may be ground or siped within confines of tread. All wheels must display white “IMCA approved” decal and wheel manufacturer decal. Any offset allowed. May use IMCA approved bead lock, on right rear only. External steel bead lock only and it cannot make wheel any narrower than 8-inches and no wider than 8.75-inches. Steel bolts only. Foam type or plastic outer mud cover allowed on right side wheels. Inner mud cover allowed on left rear only. No bleeder valves. Must use minimum 1-inch O.D. lug nuts and 0.625-inch studs are recommended. No wheel spacers allowed with OEM studs. Wheel adapters are treated as spacers and may be aluminum, maximum 1.50-inches thick.
15. BRAKES: Must be steel OEM, operative three wheel, drum or disc. Must maintain minimum OEM dimensions for hubs/rotors and calipers, cannot be lightened. Bolt pattern may be changed. 0.625-inch studs allowed. Single or dual aftermarket master cylinders allowed. Driver adjustable dual pedal brake bias allowed. Additional proportioning valve (in-line type) allowed, must be out of driver reach. Rear rotors may be aftermarket, minimum 0.810-inch thickness, maximum 12-inch O.D. Vented rotors only, no scalloped, ceramic coated, single phase or drilled rotors allowed. Rear caliper brackets must be welded to housing.
16. EXHAUST: Must use Schoenfeld headers. GM: #161, #151, #151E with 1.625-inch tubes and 3-inch collector. Chrysler: #451, #461. Ford: #351, #361. No header modifications allowed. No exhaust sensors, merge collectors, cross overs, extensions or balance tubes. Turn down allowed. Coated headers allowed. Schoenfeld mufflers, stamped IMCA609, must be used if track has noise reduction rule of 98 d.b. or more.
17. FUEL SYSTEM: Racing fuel cell required, maximum 22 gallon capacity, must be in minimum 20 gauge steel container. Must mount with minimum two solid steel straps around entire cell, two inches wide and 0.125 inch thick, between frame rails and behind rear axle. Fuel cell vents, including cap vent, must have check valves. If fuel cell does not have aircraft style positive seal filler neck/cap system - a flapper, spring or ball type filler rollover valve is required. No part of cell can be lower than protective tubing. OEM mounted, mechanical push rod fuel pumps only. No regulators, bypass fuel systems, pressurized, or return lines allowed. CARBURETOR (one only): Holley(unaltered) #4412 or #0-80583-1, 500 cfm two barrel may be used on any engine (float bowl must face forward). OEM GM Quadrajet or two barrel may be used on GM. OEM Motorcraft four or two barrel may be used on Ford. OEM Carter or AFB four or two barrel may be used on Chrysler. OEM carburetors must remain unaltered, circle track floats may be installed. No other carburetors allowed. Any adapter allowed, maximum 1.250-inches thick, including gaskets. No throttle bore adjustable carburetor spacers. Limit of one fuel filter. No cool cans. Any air cleaner allowed. No cold air boxes or ducting of any kind between engine and hood.
18. FUEL: Gasoline only. Racing fuel allowed. No E85. No performance enhancing additives or scented additives. Fuel must pass both dielectric meter and chemical tests. Fuel sample may be taken from any car at any time (Refer to IMCA Operations and Inspection Manual or General Rules for automatic penalties).
19. WEIGHT: Minimum weight limit of 2,350 pounds after race with driver in car. Weights must not be used in driver compartment or outside body. All weights must be securely mounted with at least two, .5-inch bolts, painted white with car number on it. No titanium, magnesium, stainless steel or carbon fiber components. Solid steel fasteners only.
20. BATTERY/STARTER: One 12-volt battery only. Must be shielded and securely mounted. Aftermarket starter allowed, must bolt in OEM location. Must have capability of starting without being pushed or pulled. Must leave initial staging area on demand, unaided, or go to rear of that race.
21. GAUGES/ELECTRONICS: No unapproved cameras, transmitting or listening devices, timing retard controls, or digital gauges (including tach). No electronic monitoring computer devices capable of storing or transmitting information except analog tach. OEM style ignitions only. GM: HEI distributor (must remain one unit) or point distributor allowed. Ford/Chrysler: may use OEM ignition, including OEM boxes, or HEI distributor. Any module allowed that fits inside distributor with no alteration. Vacuum advance may be removed and pick-up coil locked. No external coils allowed, unless using point distributor. No GM or aftermarket ignition boxes allowed. OEM type alternator with internal regulator allowed. No electronic traction control devices (Refer to IMCA Operations and Inspection Manual or General Rules for automatic penalties).
22. TRANSMISSION/DRIVE SHAFT: Only OEM production transmissions allowed. No aftermarket transmissions allowed. No ‘in and out’ boxes or quick change devices allowed. With engine running and car in a still position, must be able to engage car in gear and move forward, then backward. Functioning shift levers must be in OEM location. Transmission fluid coolers allowed. Flywheel, flexplate and converter must be steel.
Automatic: Any OEM automatic transmission allowed. Must use functioning, minimum 10-inch diameter steel torque converter. No direct drives, couplers, valved pumps, or bleeder style valve bodies. Must have at least one forward gear and reverse gear, gears must function. Must have an approved scattershield constructed of .125-inch by three-inch steel, 270 degrees around top of flexplate. GM automatic must be used with GM engine, may be used with Ford or Chrysler engine. Stall converters allowed. Steel OEM style flexplate only, must be bolted directly to end of crankshaft.
Manual: 3, 4 or 5 speed OEM manual transmissions only. All gears must function. Must have functioning 10.5-inch minimum diameter clutch and pressure plate bolted directly to steel flywheel. These components must rotate, consistent with engine rpm, while car is in any gear. Must use explosion-proof steel bellhousing 180 degrees around top of clutch and flywheel. No mini-clutches or couplers. Minimum 9-inch diameter Ford clutch allowed. Hydraulic slave cylinder/throw out bearing allowed.
Drive Shaft: Minimum 2-inch diameter, white, steel drive shaft only. Steel slip-yokes only. 360-degree drive shaft loop required, constructed of at least 0.125-inch by 2-inch steel, or 1-inch tubing, mounted 6-inches back from front U-joint.
23. ENGINE COMPARTMENT: Rear of engine (bellhousing flange) must be mounted at least 70-inches forward from centerline of rear axle. Minimum 11-inch engine height from ground to center of crankshaft. One radiator allowed, steel or aluminum, 27-inches by 19-inches maximum in size, must be mounted in front of engine. Racing cap and electric fans allowed. No sprinklers. Catch can required. Power steering pump and reservoir must remain one unit and mount in front of engine. Side engine mounts only (OEM or 45-degree style) must be steel, aluminum mid-plate allowed.
24. ENGINE SPECIFICATIONS: All engines must be able to be used in conventional passenger car without alterations. External engine casting and threaded holes cannot be altered. No aluminum, titanium or carbon fiber components allowed.
BLOCK: Must use OEM steel passenger vehicle production block only. No GM bowtie, Ford SVO or Chrysler W-2 components allowed. Approved blocks are: GM (Chevy only): 283, 302, 305, 307, 327, 350. Ford: 260, 289, 302, 351. Chrysler: 273, 318, 340, 360, no hemis. Maximum cubic inch limits: GM 364, Ford 360, Chrysler 370, no tolerance. Violation of cubic inch limit must be verified by removal of head and will result in disqualification, loss of all IMCA points for the season, $1,000 fine and a 30-day suspension. No 400 or larger cubic inch parts allowed. Any flat top or dished pistons allowed, no gas ported pistons. 3.48-inch maximum GM stroke. Maximum 175 lbs. per cylinder compression, no tolerance. Compression checked with one spark plug removed, turned five engine compression revolutions. Engines may be balanced and block decked. Oil filter system must remain OEM. ‘Wet’ sump oiling system only. No accumulators. OEM or OEM replacement steel crankshaft only - cannot be lightened (no aerowing, bullnose, knife edge, undercut or drilling of second or third rod throws allowed). OEM or OEM replacement steel rods only - GM must use maximum 5.7-inch rod. No cap screws. No splayed main caps. Racing oil pans allowed. Mandatory one inch inspection hole in all pans - no obstructions to crank and rods. Engine bolts may be aftermarket. Fluid dampener balancer allowed. No roller bearings allowed.
CYLINDER HEADS: Steel only. GM OEM approved head numbers are (last 3 digits): 126, 185, 336, 441, 445, 487, 487X, 493, 598, 624, 862, 882, 920, 993, 997, with valve no larger than 1.94-inch intake and 1.50-inch exhaust. May use Engine Quest (EQ) Stock Replacement (SR) cylinder head, part number CH350I, head must remain as produced, seat angles and valve sizes can not be changed: three angle valve job only (absolutely no casting removal in valve pocket of EQ head, for any reason). No porting, polishing, or unapproved alterations to ANY cylinder head. Any cast iron OEM Ford and Chrysler heads allowed with valves no larger than 2.04-inch intake and 1.70-inch exhaust. Headers must bolt directly to heads with correct numbers. No vortec, bowtie, SVO, W-2 or aftermarket heads allowed. Flat milling allowed. Guide plates, screw-in shouldered studs (0.375-inch max) and polylocks allowed. No stud girdles. Stamped steel, OEM style, stud mounted (0.375-inch max) rocker arms only. Chrysler may use OEM rocker arm bars. Any length push rods allowed. OEM diameter springs (GM - 1.250 inch maximum O.D.) must match heads, no beehive valve springs allowed.
INTAKE: Unaltered, approved OEM cast iron low rise, two- or four-barrel. Only unaltered aftermarket aluminum intakes allowed are: Weiand GM #7547-1; Ford #7515, #8023 or #7516; Chrysler #7545; Edelbrock GM #2701; Ford #7121, #7181, #7183; Chrysler #2915. No porting, polishing, or plenum alterations to ANY intake. Cooling lines allowed on aluminum intakes. Disqualification, loss of points, purse and $250 fine if any alterations are found to heads/intake. No OEM hi-rise, marine or bowtie intakes. Ford may use OEM aluminum intake, no under air or hi-rise. All intakes must have unobstructed 0.250-inch vacuum fitting. Belt driven, OEM style water pumps only, no aluminum water pumps on GM engine.
CAMSHAFT: Non-roller hydraulic cam/lifters only, cannot alter lifter bores. OEM firing order cannot be changed (GM: 1-8-4-3-6-5-7-2). Hydraulic lifters must remain UNALTERED OEM. No maximum cam lift. Must pull 12-inches of vacuum at 1200 rpms. Vacuum must be pulled on intake vacuum fitting, not carburetor. No alterations of any kind may be made at time of tech. Track equipment being used for tech is final. Lifter bores cannot be altered. Must be chain driven, no gear/belt drives.
25. ENGINE CLAIMING RULES: Refer to IMCA Operations and Inspection Manual or General Rules for claim eligibility requirements.
(A) $550 cash and exchange claim on engine ($25 goes to wrecker and $25 to official for each engine)
(B) Claim does not include - 1. flywheel, 2. clutch, 3. pressure plate, 4. bellhousing, 5. breathers, 6. carburetor, 7. starter, 8. motor mounts, 9. oil/temp. sending units, 10. fan and pulleys, 11. clutch ball, 12. clutch arm, 13. throw out bearing, 14. dip stick, 15. water pump, 16. fuel pump, rod and plate, 17. distributor, 18. plug wires, 19. water outlet and restrictor, 20. headers.
NOTE: During engine claim, block and head numbers should be verified, inspect heads and intake, and one spark plug must be removed to check pistons prior to transfer of engines. If, at this time, an engine is found illegal, driver is disqualified and suspended from all IMCA sanctioned events until such time as a $250 fine is paid, for first offense. Exchange of engines may proceed depending on circumstance. Decision to proceed is at discretion of track officials and/or IMCA.
26. ENGINE PROTEST PROCEDURES: Within 5 minutes after race, any driver starting feature may, for $250, protest any engine. $50 of the protest fee goes to track and will not be refunded, regardless of protest outcome. Driver may not protest another driver finishing in a position behind them and may not protest same driver more than once per calendar year. Under this protest, following MUST be inspected: intake manifold, cylinder head (removal required), stroke, and visual inspection of crankshaft (pan may be removed). $200 will be returned to protestor if engine is found illegal. If engine being protested is found legal, $200 protest fee will be paid to driver being protested. If parts are found illegal, or if driver refuses to submit to protest, first infraction will result in forfeiture of all cash and contingencies, trophies and points earned in feature.
27. POINT STRUCTURE /PROCEDURES: Refer to IMCA Operations and Inspection Manual or General Rules for automatic penalties.
28. EIRI: (Except in rare instances) Decisions of officials are final and binding without exception. In some cases, track safety rules may take precedence over IMCA rules - any discrepancy between IMCA and track rules should be brought to the attention of IMCA. Any rule changes or clarifications during the course of the year will be amended on www.imca.com as well as published in Inside IMCA, the official newsletter of IMCA, and will be considered as an official part of these rules.

For more information, call Tom Gutowski at 402-350-6120, or IMCA at 319-472-2201.
Copyright© 2010 IMCA All rights reserved.
No part of this publication may be reproduced, stored, or transmitted in any form, without prior written permission.

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IMCA Hobby Stock rules

www.imca.com

Download Rules PDF| Download frame PDF
Revised November, 2009. Revisions/clarifications underlined, recommendations italicized. Refer to Official 2010 IMCA Operations and Inspection Manual or General Rules.

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.

The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

2010 Hobby Stock

No one with an IMCA license during the same calendar year in any other division may compete in this division, except: licensed SportMod™ drivers (must still purchase Hobby Stock license). Unless otherwise noted, all parts to be approved OEM and must match make and year of car.

1. SAFETY EQUIPMENT: Rules apply at all times car is on track. Snell-rated SA2000, SA2005 or SFI 31.1/2005 helmet required. Roll bar padding required in driver compartment (Fire retardant recommended). SFI-approved full fire suit required. Fire retardant gloves, shoes and neck brace (or head and neck restraint) required. Right and left seat head supports required if using head restraint system with no neck collar. Recommended: Fire retardant head sock and underwear; collapsible steering shaft. Driver-side window net required, minimum 16 inch by 20 inch ribbon or mesh style, and must be mounted to roll cage so latch is at top front of window. Minimum three inch (two-inch with head restraint system) wide SFI-approved five point safety belt assembly required (Y-type shoulder harness not allowed), must be mounted securely to roll cage, recommended to be no more than one year old. Kill switch required within easy reach of driver and must be clearly marked ‘OFF’ and ‘ON’.
2. FRAME: Any American OEM full body rear wheel drive passenger car, 1964 or newer, full frame or unibody. Frame must match body. Minimum 107.5 inch wheelbase, maximum one inch difference from side to side. Rear of frame behind rear tires, no further forward than one inch behind factory seam, may be replaced in OEM location with two inch by three inch steel tubing with minimum 0.095 inch wall thickness, same length as material removed. Factory seam must remain visible. Unibodies must tie rear frame to front frame. Frames may be “X” braced. No Station Wagons, Camaros, Firebirds, or Mustangs. Click here to download frame dimensions.
3. ROLL CAGE: Main cage must consist of continuous hoops, minimum 1.75 inch O.D. tubing, with wall thickness of at least 0.095 inch, low carbon or mild steel recommended. Four-post roll cage required, front down bars and rear hoop must be welded to OEM frame. Driver’s head must not protrude outside cage with helmet on. Rear hoop must have “X” brace, consisting of one full horizontal and one full diagonal bar, minimum 1.25 inch O.D. with 0.083 inch wall thickness. Front down bars must be tied together, passenger side front down bars must be maximum 11 inches in from top of door. Must be minimum 40 inches between front and rear down bars at top of door panel. Maximum 41 inches from top center of windshield to front edge of rear hoop; maximum 13 inches to front edge of top halo. Top halo must be minimum 40 inches across, outside to outside. Rear hoop may be maximum 12 inches in from bottom of opera window. Minimum one cross bar in top halo. May have maximum two horizontal bars, (in addition to bar tying front frame horns together) for radiator protection; must be behind bumper, within confines of body, no wider than OEM frame horns. Rear kickers (down bars) and engine hoop required, and must be minimum 1.25 inch O.D. tubing with 0.083 inch wall thickness. Fuel cell protection required, must be mounted frame rail to frame rail, no higher than fuel cell, inside trunk area with maximum 1.75 inch O.D. tubing. All bars must be inside body.
4. DOOR BARS: All door bars and uprights must be minimum 1.75 inch O.D. with 0.095 inch wall thickness. Minimum three door bars, both sides, parallel to ground, and perpendicular to driver. Minimum four uprights tied from frame to top door bar on driver side, and minimum three uprights on passenger side. Steel door plates, 18 gauge or 0.049 inch minimum thickness, must be securely welded to outside of door bars on driver’s side. Plate must cover area from top door bar to rocker panel and from rear down post to five inches in front of seat. Must be visible for inspection.
5. BODY: All bodies must be unaltered OEM, or OEM replacement, in OEM location and match frame. Front body mounts must be visible. Sunroofs and T-tops must be enclosed. Aftermarket plastic nose piece allowed, recommended to match body. No spoilers, hood scoops, ground effects or skirting altering OEM appearance. OEM STEEL hood only, hood may be gutted. OEM STEEL trunk lid only, no gutting. Hood and trunk must be securely fastened and back of hood must be sealed off from driver compartment with metal. Hood must be separate from fenders. Front inner wheel wells may be removed, rear wheel wells may be removed to middle seam. Trunk floor directly over rear end housing must be removed. No overlapping or shortening of body panels. All glass must be removed, all windows in body must remain open; maximum seven inch metal sun visor allowed across top of windshield opening. All doors must be securely fastened. Fenders and quarter panels may be trimmed for tire clearance, ONLY. No reflective body panels.
6. DRIVER COMPARTMENT: Minimum three windshield bars in front of driver. Aluminum high-back seat only and must be bolted in, using minimum 0.375 inch bolts. Driver seat may be no further back than rear edge of B-pillar. Driver must be sealed off from track, driveline, engine and fuel cell. Dash not to extend more than 24 inches back from center of lower windshield opening. Dash must be flat, rear can be no higher than front, except for cowl in front of driver. No other interior tin or covers. Inside rear quarter panels, below window level, may be cut out. Doors may be gutted. No cutting out of firewalls, roof, floor, kick panels, rocker panels, except for roll cage clearance. All holes in firewalls and floor must be covered with metal. Rear firewall and speaker deck must be metal and be of OEM design for that make and model. No mirrors of any kind.
7. FRONT SUSPENSION: All components and mounts must be steel, unaltered OEM, in OEM location and match frame. OEM rubber A-frame bushings only. No aftermarket ball joints. No sway bars, spring spacers, chains or cables. Exceptions are: for 1978-1987 GM mid-sized metric frame, OEM upper A-frame may be replaced using aftermarket upper A-frame (steel or aluminum cross shaft allowed), must display “IMCA approved” decal on top of rear tube of A-frame; bolt on spindle savers allowed. Upper A-frame mount must remain OEM and cannot be moved.
8. STEERING: All components must be steel unaltered OEM, in OEM location and match frame. OEM steering column may be replaced with steel steering shafts (collapsible steering shaft recommended). Steel knuckles only. No steering quickeners, or remote power steering reservoirs. Steering wheel and quick release (required) may be aluminum.
9. SHOCKS: One unaltered steel, nonadjustable, OEM-mount shock, in OEM location, per wheel. No coil-over shocks, air shocks, remote reservoir shocks. No Schrader or bladder type valve allowed. No coil-over eliminators. Rear OEM shock location is 4.5 inches from bottom of housing to center of bolt hole, and centered on control arm bracket. $50 claim on any shock. One or all shocks on car may be claimed per event, counting as one claim on card, following shock claim procedures and penalties (Refer to IMCA Operations and Inspection Manual or General Rules).
10. SPRINGS: One steel spring per wheel only in OEM location. All coil springs must be minimum 4.5 inches O.D. and non-progressive. No spring rubbers allowed.
11. REAR SUSPENSION: All components and mounts must be steel, unaltered, OEM, in OEM location and match frame. OEM rubber control arm bushings only. Center of rear lower control arm bolt hole must be 2.25 to 2.5 inches from bottom of housing. No independent rear suspension. No sway bars, panhard bars, spring spacers, extensions, chains or cables.
12. REAR END: No floater rear ends. OEM, or OEM replacement (recommended) solid steel axles only. Nine inch Ford rear end allowed, but must be mounted like OEM rear end (centered) for that make and model. One inch inspection hole in housing required. No lightened ring gears. Must be welded spider gears, or mini spool. No torque dividing differentials.
13. BUMPERS/RUB RAILS: Bumpers must be approved OEM in OEM location, capped to fender with steel, welded or bolted. Maximum one inch wide by two inch tall steel or lexan rub rails allowed - bolted flush to body. Front and rear tow hooks mandatory. No sharp edges allowed on bumpers, rub rails or bolts. No bars past outside edge of body other than rub rails.
14. TIRES/WHEELS: Unaltered OEM 205/75, or 205/70, 14 inch or 15 inch passenger car tires only. All four tires and wheels must be same size. Tires must be inside body. No racing, snow, or all-terrain tires. No softening, conditioning, siping/grinding or grooving (Refer to IMCA Operations and Inspection Manual or General Rules for automatic penalties). Maximum seven inch wide, three to four inch offset, unaltered, D.O.T.-stamped steel wheels with standard bead bump - must weigh minimum 21 pounds. No wheel spacers. One inch O.D. steel lug nuts required. No bleeder valves.
15. BRAKES: Steel, unaltered OEM, or unaltered OEM replacement, operative four wheel, disc (front) and drum (rear) brakes, must match frame or rear end. Full OEM backing plates, no aftermarket. Master cylinder must be in OEM location. No antilock brake systems. No aftermarket brake pedal assemblies, brake shut-off or bias adjuster. Steel brake lines only, must be visible. Hubs/rotors, axle flanges and drums may be changed to different bolt pattern and larger studs.
16. EXHAUST: OEM cast iron exhaust manifolds only. No center dump type manifolds. Exhaust must extend past firewall and turn towards ground. Maximum two inch O.D. exhaust pipes. Must remain dual exhaust, no crossover or ‘Y’ pipes. No exhaust sensors. Mufflers recommended.
17. FUEL SYSTEM: Mechanical OEM type push rod fuel pumps only. Unaltered OEM two barrel carburetor for that engine, except: booster I.D. may be machined to 0.25 inch, venturi I.D. machined to 1.375 inch and throttle bore I.D machined to 1.6875 inch on Rochester carburetor. Must remove carburetor choke plate. No carburetor spacers. One 0.25 inch (maximum) thickness gasket only. $50 cash claim on carburetor, following carburetor claim procedures and penalties (Refer to IMCA Operations and Inspection Manual or General Rules). Air cleaner top/stud cannot direct air into carburetor. No top flow air cleaner housings, cold air boxes or air cleaner duct work. Maximum 22 gallon racing fuel cell required, must be in minimum 20 gauge steel container. Must be securely fastened in trunk above level of OEM trunk floor, behind rear tires, no further forward than factory seam where rear frame rail can be replaced, with minimum two solid steel straps around entire cell, two inches wide and .125 inch thick. No fuel cells allowed over rear end housing. Metal firewall must be between driver and fuel cell. All cell mounts must be steel, securely welded to frame/cage. No adjustable fuel cell mounts. Fuel cell vents, including cap vent, must have check valves. If fuel cell does not have aircraft style positive seal filler neck/cap system - a flapper, spring or ball type filler rollover valve is required. Fuel lines through driver compartment must run through metal pipe or metal conduit. One fuel filter only, cannot be in driver’s compartment. No cool cans.
18. FUEL: Gasoline only. Racing fuel allowed. No E85. No performance enhancing or scented additives. Fuel must pass both dielectric meter and chemical tests (Refer to IMCA Operations and Inspection Manual or General Rules for automatic penalties).
19. WEIGHT: No ballast allowed. Any item deemed as ballast will be required to be replaced - i.e. fuel cell straps, fuel cell cans, battery boxes, etc. No titanium, magnesium or carbon fiber products. No gun-drilled, tubular, hollow bolts or studs. Steel fasteners only.
20. BATTERY/STARTER: One 12 volt passenger car battery only, must be securely mounted between and above frame rails, and positive terminal must be covered. Battery must be in Marine type case if mounted in driver compartment. Starter must bolt in OEM location. Car must have capability of starting without being pushed or pulled. Car must leave initial staging area on demand, unaided, or go to rear of that race.
21. GAUGES/ELECTRONICS: No unapproved cameras, transmitting or listening devices. No timing retard controls, or digital gauges (including tach). No electronic monitoring computer devices capable of storing or transmitting information except analog tach. No ignition control boxes. OEM ignition only. Ford/Chrysler may use HEI distributor. No billet housings or crank triggers. All ignition rotors, caps, coils and modules must remain OEM-appearing. No alternators. No electronic traction control devices (Refer to IMCA Operations and Inspection Manual or General Rules for automatic penalties).
22. TRANSMISSION/DRIVE SHAFT: All forward and reverse gears must be operational.
Manual: Must be unaltered OEM three or four speed, with minimum 10.5 inch steel/organic single disc-type clutch and steel pressure plate assembly inside an explosion-proof steel bellhousing - minimum 270 degrees around top of clutch and flywheel area. No lightweight bellhousings. No hydraulic clutch release bearing. Steel unaltered flywheel only - 16 pound minimum - $150 fine if illegal.
Automatic: Must be unaltered OEM, with unaltered OEM pump, original bellhousing and minimum 10 inch diameter torque converter containing a minimum of three quarts of fluid - $150 fine if illegal. Torque converter must have a minimum 0.125 inch plug. Must have approved scatter shield constructed of minimum 0.125 inch by three inch steel, 270 degrees around flexplate. Flexplate must be full, unaltered OEM, or OEM replacement. No manual bump starts allowed.
Drive shaft: Steel drive shaft (minimum 2.5 inch diameter) and slip-yokes only. Drive shaft must be painted white. 360-degree driveshaft loop required and must be constructed of minimum 0.25 inch by two inch solid steel, or one inch tubing, mounted six inches back from front U-joint.
23. ENGINE COMPARTMENT: Engine must be in OEM location. On GM metric frame, center of fuel pump must be located minimum 1.75 inches in front of cross member (measured at frame). Ford metric frames must have back of fuel pump in front of cross member. Frame and cross member may not be altered for engine placement. Engine mount holes cannot be removed or altered on block. Aftermarket steel engine mounts allowed. No mid-plate allowed. Engine must be OEM appearing, must be able to be used in conventional passenger car without alteration. GM with GM, Ford with Ford, Chrysler with Chrysler. Minimum two-core radiator, must be mounted in front of engine. Overflow tubes must be directed to ground. Steel or aluminum V-belt pulleys only. No electric fans.
24. ENGINE SPECIFICATIONS: Any American make engine allowed. BLOCK: OEM steel passenger vehicle production block only. No GM Bowtie, Ford SVO or Chrysler W components allowed. GM approved block numbers are: 3892657, 3914660, 3914678, 3932388, 3932386, 3956618, 3970000, 3970006, 3970010, 3970014, 10066033, 10066036, 10243880, 14010207, 14010209, 14010287, 14016376, 14016379, 10054727, 14088528, 14088548, 14088552, 14093638, 14101148. Stroke must match block. No 400 or larger cubic inch parts allowed. Maximum 361 cubic inches (GM); 363 (Ford); 370 (Chrysler). Violation of cubic inch limit must be verified by removal of head and will result in disqualification, loss of all IMCA points for the season, $1,000 fine and a 30-day suspension. Maximum compression ratio is 9.0 to 1, no tolerance. Compression ratio checked using Whistler and cubic inches checked using pump, OR by visual inspection of part and/or casting numbers, pistons, etc (track option which method is used). Flat top or dish pistons only, no gas ported pistons. OEM or OEM replacement steel crankshaft only – cannot be lightened (no aerowing, bullnose, knife edge or undercut allowed. Effective January 1, 2011, no drilling of second or third rod throws). OEM or OEM replacement steel rods only – GM 5.7 or 6-inch rod allowed. Cap screws allowed. Conventional flat tappet cam/lifters only, cannot alter lifter bores. OEM firing order cannot be changed (GM: 1-8-4-3-6-5-7-2). May use oil restrictors. ‘Wet’ sump oiling system only. Steel oil pans only. Racing oil pans allowed. Mandatory one inch inspection hole in all pans - no obstructions to crank and rods. Accumulator allowed, must be mounted under hood. CYLINDER HEADS: Steel only. Must be unaltered approved OEM and minimum 76 cc combustion chamber. Only GM OEM approved head numbers are: 14079267, 3986336, 3986339, 3986339X, 3986388, 3932441, 376445, 3928454, 3932454, 3876487, 3973487, 3973487X, 3973493, 3951598, 468642, 330862, 333882, 3998920, 3998991, 3998993, 3998997, 3970126. Maximum size valves on these heads are 2.02 inch intake and 1.60 inch exhaust. May use Engine Quest (EQ) Stock Replacement (SR) cylinder head, part number CH350I, head must remain as produced, seat angles and valve sizes can not be changed: three angle valve job only (absolutely no casting removal in valve pocket of EQ head, for any reason); Ford - no after market or SVO heads; Chrysler - no after market or W-2 heads, 360 cubic inch heads only. No porting, polishing or alterations of any kind to heads or intake, disqualification and $250 fine if illegal. OEM non-roller rocker arms only. GM - 1.250 inch maximum O.D. valve spring, no beehive valve springs allowed. Guide plates and screw-in shouldered studs (0.375 inch max) allowed. No stud girdles. Poly locks allowed. INTAKE: Must use unaltered OEM cast iron two barrel intake. No hi-rise or marine intake manifolds. Unaltered OEM type harmonic balancer only. OEM type steel or aluminum water pumps only.
25. ENGINE CLAIM: Refer to IMCA Operations and Inspection Manual or General Rules for claim eligibility requirements.
(A) $550 cash claim on engine, $25 goes to wrecker for pulling engine and $25 goes to official.
(B) Claim does not include - 1. flywheel, 2. clutch, 3. pressure plate, 4. bellhousing, 5. breathers, 6. carburetor, 7. starter, 8. motor mounts, 9. oil/temp. sending units, 10. fan and pulleys, 11. clutch ball, 12. clutch arm, 13. throw out bearing, 14. dip stick, 15. water pump, 16. fuel pump, rod and plate, 17. distributor, 18. plug wires, 19. water outlet and restrictor. 20. exhaust manifold and pipes.
NOTE: During engine claim, block and head numbers should be verified, intake should be visually inspected, exhaust manifold must be removed to inspect heads, and one spark plug must be removed to check flat top or dish pistons prior to transfer of engine to claiming driver. If, at this time, engine is found illegal, claimed driver is disqualified and suspended from all IMCA sanctioned events until such time as a $250 fine is paid, for first offense, second offense penalties will be $500 fine and/or suspension. Claimer then has option to accept or decline engine - if declined, driver is not charged with claim.
26. POINT STRUCTURE/PROCEDURES: Refer to IMCA Operations and Inspection Manual or General Rules.
27. EIRI: (Except in rare instances) Decisions of officials are final and binding without exception. In some cases, track safety rules may take precedence over IMCA rules - any discrepancy between IMCA and track rules should be brought to the attention of IMCA. Any rule changes or clarifications during the course of the year will be amended at www.imca.com as well as published in Inside IMCA, the official newsletter of IMCA, and will be considered as an official part of rules.

For more information, call Tom Gutowski at 402-350-6120, or Kirk Niehouse at 515-231-9757 .
Copyright © 2010 IMCA. All rights reserved.
No part of this publication may be reproduced, stored, or transmitted in any form, without prior written permission.

End Hobby Stock rules

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IMCA Sport Compact

www.imca.com

Download Rules PDF
Revised November 2009. Revisions/clarifications underlined, recommendations italicized. Refer to Official 2010 IMCA Operations and Inspection Manual or www.imca.com for General Rules.

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.
The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

2010 Sport Compact

Cannot be licensed in any other IMCA division and must be at least 14 years old.

1. SAFETY EQUIPMENT: Rules apply at all times car is on track. Snell-rated SA2000, SA2005 or SFI 31.1/2005 helmet required. Roll bar padding required in driver compartment (Fire retardant recommended). SFI-approved full fire suit required. Fire retardant gloves, shoes and neck brace (or head and neck restraint) required. Right and left seat head supports required if using head restraint system with no neck collar. Recommended: Fire retardant head sock and underwear; collapsible steering shaft. Driver-side window net required, minimum 16 inch by 20 inch ribbon or mesh style, and must be mounted to roll cage so latch is at top front of window. Minimum three inch (two-inch with head restraint system) wide SFI-approved five point safety belt assembly required (Y-type shoulder harness not allowed), must be mounted securely to roll cage, recommended to be no more than one year old. Kill switch required within easy reach of driver and must be clearly marked ‘OFF’ and ‘ON’.
2. BODY/CHASSIS: Any front wheel drive, compact car with three or four cylinder engine. All cars must remain strictly OEM. Must be unaltered OEM-appearing body. No station wagons, convertibles or two seat sports cars allowed. Maximum wheelbase 107 inches. OEM steel unaltered floor pan only. Inner fenders may not be removed. Hood and trunk lid/hatch must be securely fastened. All doors must be securely welded or bolted. All glass, exterior lights, chrome/plastic trim and hood insulation must be removed. Dash may be removed, but can remain. Bumpers must be welded, chained or cabled to frame and have front and rear tow hook. OEM bumper covers must remain. Maximum seven inch front and rear sun visors allowed, opera window may be closed.
3. ROLL CAGE: Six-point, full perimeter roll cage required. Must use minimum 1.5 inch O.D. with 0.095 inch wall thickness tubing. Rear hoop must have “X” bracing configuration. Rear kickers required. Forward brace bar allowed from main cage to front strut tower. Brace bar allowed between strut towers in front and rear. No other bracing allowed on front end. Must have 1.25 inch minimum O.D. cross bar in top halo. Cage must be electric welded and attached using adequate plating (minimum 0.250 inch recommended). No iron, galvanized pipe or fittings, square tubing, brazing or soldering allowed.
4. DOOR BARS: Minimum three horizontal door bars on driver side and two horizontal door bars on passenger side. Both sides must have vertical bracing from top to bottom door bars. All tubing must be minimum 1.5 inch O.D. with 0.095 inch wall thickness.
5. DRIVER COMPARTMENT: Minimum three windshield bars and protective screen mounted in front of driver. Aluminum high-back racing seat required. Must be securely mounted to roll cage using 0.375 inch bolts. Driver must be sealed off from track, engine, transmission and fuel cell/tank. No mirrors. No gutting allowed except for roll/door bar clearance. All flammable material, radio and air bags must be removed. Front and rear firewalls must remain and have no holes. Interior must remain open.
6. SUSPENSION AND STEERING: All components and mounts must be unaltered, OEM and match year, make and model of car used. No weight jacks, modifications, racing components, aftermarket or homemade traction devices allowed. Rear wheels must track straight ahead and be in alignment with front wheels. No more than 5 degrees camber on any wheel. No center steering. Quick release steering wheel is allowed, must maintain OEM column. No aftermarket remote reservoir power steering.
7. SPRINGS/SHOCKS/STRUTS: All shocks and struts must remain OEM, in OEM location. Spring rubbers allowed.
8. TIRES AND WHEELS: OEM DOT 13, 14, 15 or 16 inch unaltered passenger tires only. No racing, mud or snow tires. No re-caps, softening, conditioning, grinding, sanding, siping or grooving allowed. Must be OEM steel or aluminum wheels, with standard bead bump and maximum seven inch width. All four tires and wheels must be the same series, size and offset. Tires must be inside of body. No wheel spacers or bleeder valves. Reinforcing of wheels recommended. Must use one inch O.D. steel lug nuts on steel wheels.
9. BRAKES: Must be steel, unaltered, OEM operative, four wheel disc or drum brakes, and match year, make and model of car used. OEM master cylinder only, in OEM location. No brake shut off or bias adjuster. Steel brake lines only.
10. EXHAUST: Exhaust manifold must be unaltered, OEM for year, make and model of car used. Smog pump, catalytic converter and air conditioning compressor may be removed. Track may require mufflers (IMCA recommended).
11. WEIGHT: No ballast (extra weight) of any kind allowed. Any item deemed as ballast will be required to be removed.
12. BATTERY/STARTER: One 12 volt battery only. Must be securely mounted with positive terminal covered. Battery must be in Marine type case if mounted in driver compartment. OEM starter only, must be in OEM location. Car must leave initial staging area on demand, unaided, or go to rear of that race.
13. GAUGES/ELECTRONICS: No unapproved cameras, transmitting or listening devices. 12 volt ignition system only. No ignition boxes. No performance chips. All ignition components must be unaltered, OEM and match year, make and model of car used. Aftermarket analog tach, oil pressure and water temp gauges only. Vehicle computer (ECU) should be mounted in accessible location for inspection.
14. FUEL SYSTEM: Must have complete, unaltered, OEM fuel system for year, make and model of car used. Gasoline only, maximum 93 octane. No E85. No performance additives. Gas tank ahead of rear axle allowed but must install shield under it. Gas tank behind rear axle must be replaced with maximum eight gallon fuel cell and relocated to trunk area. Must mount with minimum two solid steel straps around entire cell, two inches wide and 0.125 inch thick. Metal firewall or cell cover must be between driver and cell. Fuel cell vent, including cap vent, must have check valve. If racing fuel cell does not have aircraft style positive seal filler neck/cap system - a flapper, spring or ball type filler rollover valve is required. External electric fuel pump wired to the ignition switch allowed with aftermarket fuel cell. No cool cans. Fuel lines through driver compartment must be steel. Aftermarket fresh air pipe and air filter allowed, but no ram air.
15. TRANSMISSION: Must use OEM, unaltered transmission that came in year, make and model of car used. All forward and reverse gears must be operational. Flywheel, flexplate, clutch assembly and torque converter must be unaltered, OEM for year, make and model of car used. No mini clutches or couplers. Must have inspection hole in bell housing. No transmission coolers in driver compartment. No torque dividing final drive. No locked differentials.
16. ENGINE COMPARTMENT: Engine and radiator must be OEM, in OEM location for year, make and model of car used. May use solid engine mounts or safety chains. No accumulators/accusumps.
17. ENGINE: 3 or 4 cylinder in-line engines only. All engine components must be unaltered OEM for year, make and model of car used. Must use OEM crank, rods, valve sizes, stroke, etc. No aftermarket racing heads. No high performance or sports car engines of any kind. No turbo charged, super charged, rotary engines, or engines utilizing variable cam-timing.
18. VEHICLE IDENTIFICATION NUMBER (V.I.N.): The V.I.N. must remain clearly visible and unaltered in at least one of the OEM locations. Any car missing the V.I.N. will not be allowed to compete.
19. CAR CLAIM: Refer to IMCA Operations and Inspection Manual or General Rules for claim eligibility requirements.
(A) $1500 cash claim or exchange on complete car.
(B) Claim does not include – 1. racing seat, 2. safety belts, 3. fuel cell and electric fuel pump (if equipped).
AMENDMENTS TO THESE RULES MAY BE MADE AT ANY TIME IF CERTAIN TYPES OF CARS ARE DOMINATING.

For more information, call Tom Gutowski at 402-350-6120 or IMCA at 319-472-2201.
Copyright © 2010 IMCA. All rights reserved.
No part of this publication may be reproduced, stored, or transmitted in any form, without prior written permission.

End IMCA Sport Compact Rules

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DEMOLITION DERBY RULES

1. All drivers must know and obey these rules for safety or they will be disqualified.

2. Drivers must be 16 years old or older.

3. Drivers must fill out and sign track release form to participate.

4. SAFETY EQUIPMENT: Seat belts and shoulder harnesses are required, will be tested, and worn, an approved crash helmet will be worn. A 2 1/2 lb. Dry chemical fire extinguisher at the right of the driver is mandatory.

5. No locked or posi-trac rear ends allowed. Single Track ONLY!.

6. American passenger cars and standard station wagons only (Non commercial, American). No jeeps, pickups, or ambulances. No cutting of any body parts, however if car has prior damage, necessary cutting will be allowed. No reinforcing of frame or body parts, except for the drivers door. Radiator must remain in original position. All Equipment must be standard. No studded snow tires. No body alteration, unless to trim for tire clearance. No mud tires, No water in tires. Air only

7. IMPORTANT: glass and mirrors inside or out, must be removed, (glass not allowed in door panels or trunk). All lenses, chrome, body molding must be removed and loose parts inside car and trunk removed. HEADLINERS, UNUSED SEATS, CARPET AND INSIDE DOOR PANELS MUST BE REMOVED. THESE RULES WILL BE STRICTLY ENFORCED.

8. The drivers door must be reinforced. Reinforcement material cannot extend more than 2 inches beyond the outer limits of the upright door posts. Door can be completely welded. Must have at least one bar inside door not to exceed 6” in front and beyond interior edge of door.

9. Car must have a number on BOTH FRONT DOORS and be at least twelve inches in height.

10. Original gas tanks MUST BE REMOVED; A SUPPLEMENTAL TANK (maximum 6 gallon capacity) shall be placed in the rear passenger area, and rigidly secured and covered.

11. No reserve water tanks.

12. Battery MUST be removed and be secured inside of the car on the floor, in front of thepassenger seat and covered. Two batteries are NOT allowed.

13. Engines must be in original location and must have factory motor and mounts. Engines may be chained down.

14. The cars engine hood MUST be chained and MUST be able to be opened for inspection. Two eight inch fire holes are required in hood, one on each side.

15. Door and trunk lids may be chained or welded shut but not reinforced. If trunk is permanently shut, an inspection hole of 12 to 15 inches is required. No more than four one inch welds may be used per door or trunk ( a chain may be used to secure but not to reinforce).

16. Either or any starting fluid may not be used. If found in the car during or after race, car, driver and crew are disqualified.

17. You must be making contact. Anyone playing possum will be disqualified. If you are still for 60 seconds.. You are out! No contact for 60 seconds… You are out! If your car is dead, STAY IN YOUR CAR!

18. Everyone stops immediately for a red flag.

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ROLL-OVER CONTEST RULES

Competition will be open to any mid-size, compact, or sub-compact car, including station wagons. Each entry will take three (3) attempts at rolling the car. Points will be awarded to each roll and the entry with the most points at the end will win.

MOTORSPORTS COMPETITION IS VERY DANGEROUS; MAKE SURE YOU UNDERSTAND THE RULES OF THE COMPETITION PRIOR TO ENTERING.

SCORING:
Roll over attempts must be made in succession. If the vehicle’s main roof is determined by the officials to be crushed or weak, entry will NOT be able to continue competition.

POINTS:
One (1) point for each side, roof and other side. Six (6) points for complete roll. Points will be accumulated throughout the three attempts.
You may get a push to the starting area, but car must run under it’s own power to attempt roll.

CAR SPECS:

1. Any stock manufactured compact or mid-size car - American or Foreign.

2. No moon roofs, T-tops or convertibles allowed.

3. All doors must be welded shut and heavy gauge wire mesh or expanded steel must be welded into the drivers door window opening.

4. ALL GLASS - headlights, taillights, and windows must be removed and car must be debris free.

5. Headliners, passenger seat (if buckets) and bottom rear seat must be removed.

6. Maximum of three gallons of gas only. No ½ or full tanks permitted.

7. Padding on drivers door is mandatory.

8. Manufacturers seatbelt or track approved seatbelt mandatory.

9. Long sleeved shirt, long pants, shoes or sneakers mandatory.

10. Helmet mandatory.

11. Car must be numbered and your name must be painted on it. No obscene graphics or gestures allowed.

12. Leave passenger side seat belt in place. Fasten it together and use it to hold yourself down during a roll.

RECOMMENDED BUT NOT MANDATORY

1. Roll bars

2. Shoulder harness

3. Gloves

4. If driver wears glasses they should be taped on.

FINAL DECISION ON ALL MATTERS IS LEFT UP TO THE DISCRETION OF THE OFFICALS IN CHARGE.

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Enduro Races click here to pre-enter

General Rules

1. The first car to complete 200 laps or the leader after (3) hours is the winner.

2. Each car and driver must be entered. Passengers are allowed.

3. The race will begin from a standing start with a maximum of 130 cars starting.

4. Cars must hold their position until the green flag is displayed.

5. The red flag will be displayed if the track is blocked and racing can't continue, all cars must stop. (cars moving under the red will receive a five-lap penalty) The race will be restarted with the cars in the same position as before the red flag. A car involved in the blockage that can continue may do so.

6. Cars will be allowed to enter the hot-pits for repairs or servicing. Reentry to the racing surface will be allowed as the pit official indicates. Pit stops will be permitted under green conditions only. (Pitting under/during a red flag will result in a five-lap penalty unless the car was already on pit road before the red came out).

7. No communications between cars, crew or spectators. Two way radios are not permitted in cars, pits or grandstand.

8. Transponders will be used for scoring. Each car must have a transponder mounted before entering the racing surface. Drivers will be responsible for the transponder mounted to their car, if a transponder is lost or damaged driver is responsible for repair or replacement.

9. Pit stops must be achieved in an orderly and safe fashion. Cars entering the regular pit area are done for the event, work on cars in the hot-pit area only.

10. There will be a claiming rule in effect for competitors. Any car that finishes in the money can be claimed by the driver owner or another car that entered the event. The price will be $1500.00 cash. It the owner of the car being claimed does not accept the $1500.00, he does not get paid for any position. All claiming must be done within 10 minutes of completion of the event and be in writing.

Car and Body

1. Any 1960 or newer car is eligible. No pick-ups, four wheel drives, jeep type vehicles. 4, 6 or 8 cylinder engines OK. Minimum stock wheelbase allowed 105 inches for V-8, 88 inches for V-6 or 4 cylinder.

2. Roll cage optional. Gutting of factory interior panels only allowed for roll cage clearance. EXAMPLE: you may remove the inner door bracing if you are replacing it with door bars.

3. No-bracing in the bumper areas. However, bumpers must be chained or cabled as a safety item to help retain the bumper.

4. All doors must be closed. Recommend welded, chained, or bolted shut.

5. Removal of windshield is optional. If removed, 3/4 of opening must be replaced with a screen.

6. Racing approved shoulder harness and lap belts are recommended. Racing seats allowed.

7. All burnable type material, floor mats, head liners, rear seats, etc. must be removed. The rear seat shelf must be left in as a fire stop, and any openings to the trunk area must be enclosed if aftermarket fuel cell is mounted in trunk.

8. Complete bumper to bumper steel unibody must be retained. No lightening permitted. No added weight allowed.

9. The stock steel unaltered floor pan, firewalls and trunk must be retained. (Fuel cells, properly attached may be located in the trunk. )

10. Cars must retain their strictly stock appearance, no cutting chopping, channeling, or shortening allowed. Hoods must be kept in place at all times.

11. Mesh window nets are permitted, but must be removable.

12. Front inner fenders may be removed, rear inner fenders must remain. Wheel wells may be trimmed for tire clearance only.

Suspension, Tires, Wheels

1. Suspension parts must remain absolutely stock for that make and model car. No spacers, lumber or chains, etc. may be used to alter stock suspension of that car.

2. Springs must be of a OEM design. No overload shocks with coilover springs. One spring and shock in original mount only.

3. Stock wheels only. No racing wheels or offset wheels. Dot legal tires must pass thru a 9" hoop at the bulge. No gumball tires, no snow treads, no studded tires. All season radial OK.

Engine

1. The engines must be strictly stock for that model and make and in its original mounts. No aftermarket external oil coolers.

2. A/C and heat components may be removed.

3. Smog equipment may be removed.

4. Minimum 18 lbs. of vacuum at 1000 RPM

5. Air cleaner to oil pan must be all factory equipment!

6. Radiator may be replaced with aftermarket unit.

Transmission

1. Stock transmission and rear end only. No aftermarket external oil coolers.

Miscellaneous

1. Fuel cells permitted, and may be placed in the trunk area if securely fastened, or gas tanks must be original and remain in original location. Must have two (2) metal holding straps.

2. Batteries may be relocated but must be contained in a marine container or comparable container securely fastened.

3. Headlights, tail lights and all chrome may be removed.

4. Any loss of wheel or tire requires your immediate leaving the race course. Continuing on a flat tire is not permitted.

5. Rupture of your gas tank and/or loss of gas requires immediate black flag.

6. No locked rears.

7. Approved helmet required.

8. Any driver climbing out of a car while on the racing surface during the green flag will be disqualified. NO Exception!

9. Cars will hold their position until the green flag is displayed.

10. The yellow flag will not be used. If there are cars with breakdowns or crashed, the other cars will avoid them and continue to race.

11. The red flag will be displayed ONLY if the track is blocked and racing cannot continue. All cars must stop under the red flag. The race will be restarted with the cars in the same position as before the red flag. Any car involved in the blockage that can continue to race may do so. The flagman will indicate the middle of the race. The white flag will indicate the leader is on the final lap.

Starting Position Assignment

1. All starting position numbers will be assigned in the order of entry into the event. Only pre-registered cars will be allowed to come to the track with numbers already on the car. Cars that do not pre-register must bring a can of spray paint (in a contrasting color to the base color of the car) to add the number to the car at the track. Drivers registering after deadline or day of the event will start at the rear of the field.

ANY CAR, TEAM OR DRIVER NOT MEETING Wild West Speedway SPECIFICATIONS, OR STANDARD RACING SAFETY PROCEDURES AND EQUIPMENT, IS SUBJECT TO AUTOMATIC DISQUALIFICATION AND /OR PENALITIES.

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