NOTICE: All equipment is subject to the approval of Tomah Sparta Raceway officials. No equipment will be considered as having been approved by reason of having passed through inspection unobserved. Any equipment which does not conform to specifications, intent or tolerances contained in this Tomah Sparta Raceway rulebook, will not be eligible for approval.
INSPECTIONS AND PENALTIES
1. The racing officials and management will resolve any disagreement over technical questions or operations. When their decision is rendered, such decision is final and binding.
2. Competitor Obligations - A competitor must take whatever steps are required, including teardown of the car, as requested by a Tomah Sparta Raceway official to facilitate inspection of the car. Failure to submit to inspection, or take all steps requested of inspection shall result in immediate disqualification, suspension of the driver and car owner and/or a cash fine.
3. All competing cars will be subject to technical inspections at each event throughout the season at a time and interval determined by the Director of Competition. No forewarning will be made.
4. Any car not conforming to the rules will be subject to several method penalties:
a. Car may be disqualified, forfeiting all points for the event, plus any moneys earned during the race meet.
b. Points and moneys may be forfeited in the amount and severity decided upon by the Director of Competition.
c. Additional weight may be required to be added as determined by the Director of Competition. It may be doubled if the infraction is not corrected by the next race meet. If not corrected by the 3rd meet, the car will be disqualified.
5. Continuous developments in racing may necessitate changes. If necessary, we may update, modify and add to or delete rules. The NASCAR “EIRI” (except in rare instances) rule is always in effect and applicable.
1. At any time, before, during or after an event, officials may require additional measures or equipment or make additional determinations, as they deem necessary to further reduce the risk to competitors.
2. All cars are subject to a minimum specification inspection at any time. It is the responsibility of the driver to prepare each car FREE of defects and in safe racing condition.
3. A quick release type approved safety belt of no less than three (3) inches in width is mandatory. Both ends must be fastened to roll bar cage with aircraft quality bolts not less than 3/8 of an inch in diameter. A steel plate may be welded to the roll bar cage on the right side of the driver so the belt can be brought down in such a manner that it will prevent the driver from sliding from side to side under the belt. The belt must come from behind the driver. Shoulder harness inertia reel not allowed. Belts must show manufacturer’s production date within two years.
WHEEL BASES AND ELIGIBLE MODELS
1. Any 1960 or newer American-made non-convertible passenger car with wheelbase over 108-inches (Ford and Chrysler over 104-inches).
2. Wheelbase must be within 1-inch of stock. Maximum tread width 63 ½ -inches, measured center to center of tires at spindle height (front and rear).
BODY AND APPEARANCE
a. Body must remain in factory location, and be stock appearing.
b. No setback bodies will be allowed.
c. No holes in hood or deck lid other than for pin type fasteners, (also see section 2-8 air intake rules)
d. Body behind rear tires may be no lower than rocker panel height.
e. No dirt style or truck bodies.
f. Rear spoiler maximum dimensions will be 5" high and 60" wide with no side wings or front mount supports, a maximum height of 40" from the ground.
g. The leading edge of the front spoiler will not be ahead of the front bumper, (some variation will be allowed due to the use of aftermarket plastic noses) and have a minimum ground clearance of 4". All measurements are taken with the driver in the car.
h. Unsafe or unnecessary modifications will not be allowed and are subject to the judgment of the tech official.
i. The entire back end of car must be covered with material so as to make it look stock appearing
2. Stock Steel Bodies
a. Any OEM body with a minimum wheelbase of 104" and is of mid-size origin and placed on a stock OEM frame.
b. Stock plastic grills must be removed and replaced with sheet metal or mesh.
3. Aftermarket Bodies
a. After market short track steel, fiberglass, plastic or aluminum bodies (no year restriction) will be allowed as long as they are of mid-size origin and placed on a stock OEM frame.
b. No light weight fiberglass or carbon fiber
WINDSHIELDS AND GLASS
Stock or Lexan windshields required, all other windows (if used) must be of Lexan.
Chevy engines must be located so that the furthest forward spark plug is in line with or ahead of the upper ball joint centerline. All other engines allowed a 2-inch set back. Minimum crankshaft centerline height 10.5” (front and back). Maximum offset (right-left) 3”.
Engine must be of same manufacturer as chassis and body.
Maximum displacement 362cid (Chrysler products 368cid).
1. No aluminum blocks
2. A minimum of zero deck height required.
ENGINE PISTONS / RODS
1. Flat top pistons required.
2. Magnetic steel connecting rods only. Rod journal minimum diameter 1.900”
OIL PANS/OIL SYSTEMS
A ¾”NPT inspection hole in oil pan required. Inspection hole must be located in line with second or third rod journal of crankshaft, on either side of pan and above sump area (oil level). Hole in windage tray in line with inspection hole required.
Production type steel crankshaft with normal configuration counter weights required.
1. Stock or stock replacement cast iron unaltered heads (no porting, polishing, acid dipping, or gasket matching allowed) required. No aluminum heads allowed.
2. The only stock replacement heads allowed are World Products SR I052 #4266B and #4267B.
3. Minimum combustion chamber 62cc, maximum 2.02-inch intake and 1.6-inch exhaust valves required.
4. Maximum of two valves per cylinder.
5. No Bowtie, Vortec or 18-degree heads allowed on GM products.
6. Valve spring retainers are the only titanium parts allowed.
1. Completely stock passenger car 2-bbl. cast iron intake and exhaust manifolds required.
2. (Edelbrock Performer #2101 or Edelbrock Performer RPM #7101 allowed)
3. No grinding, polishing or altering allowed.
4. No Bow-Tie manifolds.
5. Internal heat riser crossover must remain in place.
CAMSHAFT / VALVE LIFTERS AND ROCKER ARMS
1. Hydraulic cam/lifters only. Must pass leak test of minimum of one hundred thousandths.
2. Maximum lift at valve: GM-.490 inch, Ford/Mopar-.520 inch.
3. Roller tip rocker arms allowed, but must retain original pivot type (ball & socket).
4. No solid lifter or roller cams allowed.
Maximum 10.8 to one compression ratio.
1. Center dump and log style manifolds allowed.
2. Max exhaust manifold inside diameter 2-inches.
3. No cast iron header style exhaust manifolds allowed.
4. Maximum diameter 2½” before collector and/or muffler, 4½” maximum diameter behind muffler.
5. Exhaust must exit beneath car and behind driver, pointing downward. Effective mufflers required. Exhaust out the door may result in additional weight penalty.
1. Stock unaltered 500 CFM Stock Holley 4412 2 bbl. or 1.375” Rochester allowed on all cars.
2. No alterations except removal of choke "Butterfly" allowed.
3. Double return springs required.
4. Carburetor Rework Guidelines:
a. Body of Carbs:
i. No polishing, grinding, or drilling of holes allowed.
ii. Gasket surfaces may be machined for improved sealing.
b. The choke may be removed, but all screw holes must be permanently sealed.
c. Choke horn may not be removed.
d. Boosters may not be changed. Height, size, and shape must remain standard and unaltered.
e. Venturi area must not be altered in any manner. Casting ring must not be removed.
f. Base plate must not be altered in shape or size.
g. Butterflies: Stock butterflies must not be thinned or tapered. Idle holes may be drilled in butterflies. Screw ends may be cut even with shafts, but screw heads must remain standard.
5. Throttle Shafts: Shafts must remain standard and must not be thinned or cut in any manner.
6. Any attempt to pull outside air other than straight down through the venture is not permitted.
7. Jets may be changed. No dial-a-jet devices.
8. No addition of any material, such as epoxy, may be added to carb or parts except to seal vacated external screw holes.
CARB SPACERS, GASKETS, MOUNTING
1. Carb Adaptor: 1.5” max thick w/gaskets. Bores must be straight (not tapered, angled beveled or grooved). Original orientation required. No part of adaptor may protrude into plenum of Intake Manifold. Adaptors are one piece only.
2. No adapter allowed on CCMP.
Air cleaner required to act as flame arrestor. No air induction boxes, x-stream top plate or ram air units.
1. OEM type, mechanical fuel pump, in original location, required.
2. Steel fuel lines located outside driver’s compartment required.
3. Remote fuel filter allowed.
Stock type (HEI) ignition components only. Any coil permitted. Firing order may not be altered. No MSD boxes, dual-point distributors computer controlled or crank fired ignitions not allowed. Batteries must be securely mounted ahead of rear axle and away from fuel container and lines. All batteries in driving compartment must be in an approved sealed battery box. Maximum 12 volt system.
1. Any metal radiator that does not alter the exterior appearance of car allowed. Fan protection (20 gauge minimum thickness) required. Overflow tank located under hood required.
2. No anti-freeze: $50 FINE!
CLUTCH, PRESSURE PLATE AND FLYWHEEL
Manual transmissions must utilize stock all steel type pressure plate and steel or cast iron flywheel (min 15.5 lbs.). Clutch disc must be minimum of 10” diameter with stock full fiber disc.
TRANSMISSION / TRANSAXLE
1. Stock automatic transmission with operating 11-inch minimum diameter torque converter.
2. Torque converter post-race inspection will occasionally be required.
a. Option 1; install drain plug in torque converter.
b. Option 2; remove torque converter for detailed inspection.
3. All forward and reverse gears must operate.
4. Transmission overflow bottle required. No rubber transmission lines.
5. Transmission cooler not allowed in driver compartment.
6. A manual stock OEM transmission will be permitted.
7. All gears must be operable.
8. No 5-speed transmissions.
9. No straight cut gears or gun-drilled main shafts, no lightening of gears on main shaft.
10. All transmissions must an approved scattershield
1. Rear end must be stock for that make car.
2. Ford 9” allowed, unlocked or locked by welding or spool only.
3. If using 9" ford rear-end, upper control arm mounts on frame may be raised max. 1”.
4. Disc brakes allowed on floater rear ends only.
5. All drain and inspection plugs must be safety wired. $50 fine for oiling up the track.
1. Minimum diameter 2.5” steel driveshaft required.
2. Driveshaft must be painted a bright reflective color.
3. Safety hoop required on front half of drive shaft. Driver must be protected from drive shaft entering into driving compartment.
BRAKES AND PEDAL ASSEMBLY
1. Stock brake units only.
2. Four-wheel brakes required at all times.
3. Master cylinder and pedals must remain in stock location.
4. No "made for racing" components allowed.
5. Drilled rotors not allowed (except stock replacement).
6. One brake proportioning valve allowed.
7. Rear disc allowed with floater type rear ends
FRAMES AND UNIBODY
1. GM chassis must retain original wheelbase. Ford/Chrysler may use GM Metric frame.
2. 2 Complete stock steel frame or unit-body must be retained to a point 6” behind center of rear axle. Replacement with square tubing allowed rear of that point.
3. Front stub and rest of frame must match.
4. Steel firewall and floorpan required.
5. Passenger side interior can be tinned over from top of driveshaft tunnel to passenger side door bars.
6. Minimum frame height 4.75”.
MID SIZE GM METRIC CHASSIS
Lower right A-frame may be 1” longer than stock. Coleman steel hubs or full size GM spindles allowed. Steering center link modifications (to improve bump-steer) allowed. Any stock production rear end allowed, provided that lower control arm/shock mount locations remain in the stock position for the metric chassis. Rear end may not exceed 58 inches in width from axle flange to axle flange. Aftermarket or S-10 axle required on right side of metric rear ends.
ROLL BARS / CAGE
1. Driver assumes responsibility for roll bar installation and workmanship.
2. Roll bars must be padded for protection of driver. Recommended is high-density roll bar padding.
3. All cars must have a well constructed, properly welded and gusseted 4 or 6 point roll cage made of minimum 1.75” .090 wall tubing or equivalent.
4. Roll cage must have four uprights properly welded to frame.
5. Right side of roll cage may not be located inboard more than right rails of front and rear stubs.
6. Main roll hoop must be behind driver and be reinforced with a full x-bar configuration. Cage must be reinforced from left to right with bars under the dash, along floorboards, and behind driver in main roll hoop.
7. At least two bars must extend from main roll cage rearward to frame kick-up or beyond. A minimum of four equally spaced horizontal bars required in driver’s door, three in passenger side door.
8. Door bars must be connected with a minimum of two equally spaced vertical studs. Two angular bars must connect bottom door bar to frame rail.
9. All welds in cage and door structure must be gusseted.
10. Driver's foot protection bar required. Left side door bar deflector plates of at least .125” steel required.
11. Front hoop must connect to front roll cage uprights.
12. Uni-body roll cage construction: contact competition director for guidelines.
1. Any stock appearing steel spring that fits in original mount in original position allowed.
2. One steel non-adjustable, non rebuildable shock, with a welded bearing , with a maximum MSRP $85, per wheel. No heim joint shocks allowed.
3. Screw Jacks, spring adjusters, adjustable spring spacer units where shock mounts through spring (front), screw type (wedge bolt) where shock mounts outside spring (rear) allowed.
4. Spring buckets may protrude through floor pan.
5. All other components must remain stock and in stock location, except where otherwise stated.
6. Lower A-frames may have bushings replaced with steel insert type.
7. Rear Control link rubber bushings may be replaced with approved non-metallic unaltered stock replacement parts.
8. Tubular upper A-frames allowed, may relocate upper frame mount.
9. No monoball, heim joints or clevis’ permitted on suspension components.
10. Aftermarket one-piece hollow sway bar allowed. No spline type sway bars. Frame mounted sway bar adjusters allowed. Maximum diameter 1 ¼”.
11. 1" shock extenders in front and 2" in rear allowed.
12. No lift bars, rear sway bar or traction devices.
13. Non-adjustable rear control arms with stock dimensions and approved unaltered stock style bushings allowed.
SPINDLES AND HUBS
1. Stock unaltered spindles, hubs, and steering components required.
2. Coleman steel hubs allowed.
3. No lowered spindles.
4. Heim joints allowed on outer tie rod ends.
Fabricated steering column must incorporate 2 U-joints.
Minimum ground clearance 4.75” with driver in car, at any point including spoilers, scoops, and mufflers, except front crossmember, which is 2.75”.
1. Minimum wheel weight of 19.0 lb. - IMCA “sticker” legal.
2. Acceptable only are steel wheels with a maximum inside width of 8” measured bead to bead.
3. Black wheels MUST BE painted white, silver or yellow on complete backside.
4. Bleeder valves are not allowed.
1. Only approved tire by Tomah Sparta Raceway is the Hoosier S800 NO GOODYEAR TIRES!!!!!!!
2. No devices or material for disseminating softening materials or compounds changing composition or character of tire allowed any time. Failure to comply will result in disqualification, loss of season to date points and suspension.
1. ALL WEIGHTS INCLUDE DRIVER
2. Minimum total weight is 3100 lbs.
3. Add 25 lbs. if body and chassis don't match.
4. 52% front axle, and 42% right side.
5. All weights must be properly anchored to frame rail outside driver's compartment. Weights must not be lower than bottom of frame rail.
6. Ballast must be painted white and lettered with car number.
7. Management reserves the right to alter, change or adjust weight limits at their option and add additional weight to non-conforming cars.
8. Deduct 50 lbs for 9.5:1 or less compression.
9. All weight measurements, including minimums, will be made with the driver sitting in the driver’s seat, with steering wheel in place, hands on steering wheel and helmet on driver’s head.
10. All “added” weight must be mounted to FRAME.
11. Minimum weight units - 5 lb.
12. All ballast weight will be painted white and numbered to car. $25 fine for each piece that fails to comply.
13. Any loss of weight from any car for any reason, will result in a cash fine.
14. Ballast weight must meet 10” ground clearance behind rear axle.
15. Weight determined by the official Tomah Sparta Raceway scales only.
1. Fuel cells must be separated from the driver’s compartment by a full, complete metal firewall.
2. Fuel cells must be securely mounted between the frame rails and behind the rear end. Fuel cell must be adequately protected from behind and below by a triangularly braced fuel tank guard. Minimum of two (2) 1 ½“ x 1/8” straps under and over fuel cell.
3. Cell must be protected with 1/8” steel plates on rear, left and right sides.
4. "Vent tube" must exit out the rear of the car.
5. Fuel tank must be minimum spec. tank of an outside 18 gauge steel canister, liner of plastic, or suitable rubber, sponge baffles, and boltable filler plate assembly with operable check valves.
6. Maximum capacity of fuel tank: 22 gallon.
7. 10” minimum on all cars from the ground.
8. No electric fuel pumps.
9. Regularly available pump gas or Racing Gasoline only as a fuel, no fuel additives allowed.
Appearance of pit personnel must be neat and clean. Remember -- your appearance and manner is a visual statement for your sponsors and fans.
END OF SPORTSMAN RULE SECTION