| BODIES:A-B-C bodies are the standard, any other are subject to tech approval. NO DOWNFORCE BODIES OR PANELS ALLOWED. Must be stock appearing and mounted per manufacture guidelines (see ABC rule book). Professional appearance must be maintained. No flaring of body, no body skirting or streamlining allowed. No belly pan allowed. (Nose width maximum of 1-3/4” past tires). Frame and body clearance 4” minimum without driver. Minimum 47” roof height required. Rear spoiler maximum 6.5” x 60”, clear lexan. TREAD WIDTH: Absolute Maximum
Coil-overs: 65.5”
Big Spring-fabricated & stock stub: 67.5”
(Big spring is 4-3/4” minimum diameter front & rear)
BASE WEIGHT:
Compression & Tour Engines2800 lbs/58% Left
Compression Engine – Roller Cam 2850lbs /58% Left
Bowties, Vortecs, untouched 2750 lbs/58% Left
604 Crate Engines 2700 lbs/58% Left
Any car not meeting rules can be accessed weight and/or % penalty in order to compete in that days event.
ALL ENGINES:
Cast Iron Blocks ONLY
Centerline of crankshaft must be within 1” of the centerline of the track width (measured from the inside lip of each wheel to centerline of engine).
Engine set back: GM 2”, Ford & Mopar 3” (measured from the most forward spark plug hole to the centerline of the upper ball joints).
Crank height minimum 10”
Dry sump systems allowed.
Flat tappet and roller cams only. Mushrooms or radius bottom lifters are NOT allowed. Maximum lifter size .875 for GM & maximum .904 for Ford & Dodge.
Distributor type ignition only in stock location, NO magnetos.
Electronic traction control is NOT allowed. The officials reserve the right to exchange ignition boxes, tachometers, etc.
Exhaust sound level 95 db at 100’
Muffler required, with maximum 4” diameter exhaust pipe at select tracks.
Mechanical fuel pump – NO electric fuel pumps allowed.
NO ethylene-glycol allowed!
Water Pump – stock type belt driven water pumps only. NO electric pumps allowed.
Radiator must be in stock location. Any radiator allowed.
Engine MUST be self-starting and in working order.
DRIVETRAIN:
Clutches with a minimum diameter of 5-1/2”. Multiple disc clutches allowed. Only magnetic steel discs and pressure plates allowed. Clutch cover and housing may be aluminum or steel.
Transmission must have at least two forward and one reverse gear in working order. Manual transmission only. Automatics are NOT allowed.
Drivelines of steel or aluminum only (NO CARBON FIBER). MUST be painted white and two driveline hoops required.
Rear-end can be interchanged between manufacturers. Quick change rear ends and coolers allowed. Steel or rubberized drive plates may be used. Absolutely NO cambered rear ends.
APPROVED ENGINE COMBINATIONS:
COMPRESSION ENGINES
Brodix Spec Head (recommended) PN: SP-CH/FO/MO
Spec heads have CNC combustion chambers, valve bowls and intake ports. NO grinding, blending, polishing welding and/or use of any substance to alter flow whatsoever. Flat-milling only. Valve angle must remain as manufactured. Titanium valves are allowed. Valve stem min. 11/32” diameter. Brodix heads may only be used on motors 360 cid or less.
Cast Iron Heads: Approved heads (max. 200cc styles only). GM Bowtie, GM Vortec, Dart Iron Eagle & Platinum 200’s World Products Sportsman II, Ford Motorsports and Mopar W-2. ALL UNTOUCHED with ID markings intact. No porting, polishing, port matching and/or acid dipping allowed. NOTE: All heads must check within 10cc’s of mfg volume, this allowance for valve replacement & casting variance only. Approved valve angle: CH-23, FO- 11, MO-15
Intake Manifold: Standard aluminum open-plenum intake manifolds only with minimal (1” maximum) port matching permitted on runners. No additional flow improvement work or drilling allowed. Maximum intake height from plenum floor, to include spacer and gaskets, may not exceed 5-1/8”.
Any 4-barrel carburetor permitted.
TOUR 9:1 ENGINES
No aluminum blocks. Aluminum heads of OEM designs only. Only 23-degree heads allowed on GM products. No SB2 heads, SM splayed heads, 14 degree or Buick heads allowed.
Any Crankshaft (no titanium), camshaft and camshaft drive allowed.
Compression ratio maximum allowed is 9:5:1 on all cylinders for Tour engines with roller camshaft.
Intake Manifold: Any approved high-rise intake manifold allowed. One aluminum adapter (spacer), maximum of 1” TOTAL thickness allowed. Only 2 gaskets allowed with a maximum thickness of .050”. Spacer must be straight cut with no taper.
Carburetor: Any 4-barrel carburetor permitted.
GM “604” CRATE ENGINES
Engine MUST maintain engine manufacturer specifications.
Carburetor: Any Holley 650 cfm straight flange four-barrel with throttle bore diameter maximum of 1-11/16”. Recommend Holley 650 cfm PN 0-80541-1. All carburetors will be subject to carburetor tech equipment.
Compression ratio maximum 10 to 1
Intake Manifold maximum height from plenum floor to include spacer and gasket(s) may not exceed 5-1/8”.
REV limiter: MUST have ignition system that is capable of using a 2-prong MSD style RPM chip. Competitor must supply own 2-prong chip maximum of 6300 RPM. We reserve the right to supply tour owned RPM chips on event day.
SINGLE ignition system only allowed.
All crate engines are subject to tech inspection, and may be impounded following the race for dyno. inspection.
The race officials shall be empowered to permit minor 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 ALTERATIONS OF SPECIFICATIONS. ANY INTERPRETATION OR DEVIATION OF THESE RULES IS LEFT TO THE DISCRETION OF THE OFFICIALS. THEIR DECISION IS FINAL.
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FRAME & SUSPENSION:Professionally built full steel roll cage required with 1-3/4” .095 tubing minimum around driver. All contact areas in driver compartment must be covered with high density padding. It is mandatory to have 16 gauge metal welded between door bars or a 16 gauge plate 40” in length and 17” high minimum, welded between the door bars and the driver’s door. ANY FRAME SHOWING POOR WORKMANSHIP WILL NOT BE ALLOWED TO COMPETE! Wheelbase minimum is 101”
Big Spring cars must have shocks mounted outboard of the coil springs, not INSIDE the springs
Adjustable Shocks are allowed. One shock per wheel. No remote reservoir or remote adjustable shocks allowed.
Steering Components – drag links, center link, spindles, etc… MUST be OEM or fabricated steel.
Rack & Pinion steering allowed with aluminum sleeves.
Independent Rear Suspension is NOT allowed.
Trailing Arms are to be one piece ONLY. NO spring loaded trailing arms. .
Multiple 3rd links allowed. Gas or oil dampened shocks are not allowed.
Rear Sway Bars are NOT permitted.
No shock, spring or suspension adjusting devices allowed in the drivers compartment.
Added Weight must be securely mounted, painted weight and include the car number. Solid block lead only. No pellets or liquid. Weight shifting devices are NOT allowed.
Steel racing wheels with maximum 10” width. Any offset allowed.
FIREWALL & INTERIOR:
Interior of car must be completely enclosed in respect to engine compartment, track surface and wheel wells.
FUEL and FUEL CELLS:
Gasoline only; no blended, exotic fuels or fuel additives allowed. 22-gallon maximum commercially manufactured fuel cell with rubberized fabric bladder is mandatory. A fuel cell protector bar and minimum 22-gauge steel container are required. Minimum 10” fuel cell ground clearance. 14 gauge reinforcement plates in front and behind the fuel cell container are strongly recommended.
TIRES:
Triple Crown series-specific (stamped) tires unless otherwise stipulated. Designated right & left mounting. No altering of tire or tire softening chemicals allowed. Tires must be purchased from Concept. Cars must start the feature on the same tires they qualified.
TIRE MAKE, AND MODEL WILL BE FORTHCOMMING. WE ARE CURRENTLY CONDUCTING TIRE TESTS WITH OUR TIRE MANUFACTURERS, AND WILL ISSUE AT A LATER DATE.
SAFETY:
Helmet will be 2000 Snell or better, without visible damage
Aluminum racing seats with padded headrest required with rib protection and leg extensions recommended.
Seatbelts and shoulder harness no less than 3” wide is compulsory and must connect with a quick release buckle. Belts older than 5 years or with visible damage will not be allowed.
Head and neck restraints are strongly recommended (i.e.: Hans or Hutchins device, or at minimum a neck collar)
1” Mesh Window net with quick release required.
Metal quick release steering wheel coupler must be used. Center of steering wheel must be padded.
FIRE:
All racecars must have functional fire extinguisher equipment mounted within reach of the driver. A built-in Halon or equivalent system is strongly recommended. Driver’s suits of fire-resistant material that covers the body from neck to ankles and wrists are mandatory. A multi-layer, fire resistant driving suit and fire-resistant gloves, socks, shoes, headgear, and long underwear are strongly recommended. Fire-resistant clothing and head & eye protection is also strongly recommended for all crewmembers. All cars will have in their pit, a 10 lb. minimum Halon or dry chemical fire extinguisher or equal.
RADIOS:
Two-way radio communication between the driver and minimum of one spotter required at anytime car is on track. One spotter is required to be in designated spotter’s area during feature event.
APPEARANCE:
All cars must be neatly lettered. Side and roof numbers at least 18” high & 3” wide. Front fender area and across top of windshield reserved for series approved decals only.
GENERAL:
- In order to compete, each driver, and crew member in the pit area must have a valid pit pass.
- The driver of each car is responsible for all actions of their crew and others affiliated with their team. All teams must maintain professional attitude and conduct.
- All cars will compete only under the approval of the lead tech inspector. All cars must pass tech inspection and scales prior to hot lapping.
- These rules and regulations are intended as a guide. Use of equipment which is not within the acceptable rules and regulations will be considered illegal and may result in a fine, disqualification and/or confiscation.
- Penalties for prohibited parts and/or rule and conduct infractions will be determined by officials. This may include forfeiture of purse money and/or points, a fine, or instructions to fix it by next event. Repeated or flagrant rule violations and infractions will not be tolerated and will lead to suspension.
- In the interest of fairness, the rules may be adjusted by the officials to create a balance in competition. All decisions made by the officials will be in the best interest of safety and for parity of competition. Their decision is final.
- Standard safety rules apply and will be strictly enforced. Any item that the lead tech inspector judges unsafe on your car must be corrected.
- It is the responsibility of the driver to see that his car completely satisfies the rules, including but not limited to all safety rules. The driver of each car represents to all that his car has satisfied all applicable rules, safety and other, whenever such driver participates in warm-up, practice or competitive laps.
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