Thunder

 

Weight:

3400 lbs

 

Body

American made rear wheel drive only.

May run Sheet metal / Stock body , no excessive hulling allowed.

Must retain OEM front fire wall and complete floor pans. Trunk and rear fender wells may be removed.

OEM spoilers are allowed. Aftermarket or fabricated spoilers must not exceed 6 inches in height.

 

Chassis

Stock – no weight jacks, no three links, no adjustable links, no coil over                   Rear control arms must remain stock.

Standard steering box and steering linkage.

Coil springs minimum 5" coils.

Shocks must be stock type.

Chevrolet can run ford 9 inch. No floaters 

May run Tubular upper; non adjustable, stock type ball joints in stock location

 

Roll cage – Must be minimum of 1 1\2" OD tubing .095" thick.

Must have a minimum of 3 driver door bars and 2 passenger door bars.

Must have support bars behind driver. Must be welded to frame.

 

OEM brake system must be used. May run after market single cylinder.

Rear disc brakes are allowed but must  be original equipment. No after market parts including calipers, rotors and pads, etc. are allowed.

Wheel Base – 108" minimum.

Wheels – Steel 8" maximum width. Bead locks allowed right side only. 1" lugs nuts mandatory.

Racing fuel cell                             Mandatory. Enclosed in steel can, with minimum of two 2" wide steel straps.

Fuel                                                        Gasoline or Racing Fuel only.

 

Tires

Open Wheels Tires

May run bead locks anywhere on car.

 

Driveshaft – Any steel type, must be painted white with car # on it. Safety loop mandatory.

Rear end – Stock, locked, or welded rear end is allowed for make.

Transmission – Stock automatic transmission with working converter.  If you have a dust cover it must have a hole for inspection.

Maximum engine set back – stock location for make and model.

Three steel vertical bars mounted in windshield opening in front of driver.

 

Racing seat mandatory.

Four point harness mandatory.

Fire extinguisher mandatory. Must be in working order and attached in car.

Battery must be securely mounted in a box or case. If battery is inside car it must have a cover.

Add on weights must be painted white with car # on them and securely bolted to car.

Window net recommended.

Must have tow hooks front and rear.

 

Engine

Crank must be minimum 48 lbs.

362 cubic inch

No super chargers, turbo, etc.

Fuel system and carburetors - stock type fuel injection is ok but must be stock.

Holley two barrels, Holley vacuum secondary carburetors are ok.

Exhaust - Stock manifold. Headers are ok.

Cams - Any flat tappet.

Intake - must run a dual plane intake only with no modifications. Stranded design (no air gaps or torks) 

Ignition – Stock type HEI.

Heads 

No race type heads of any kind.

S/R heads are ok.

All heads must be steel.

No angled plug heads.

No port and polish.

Stock diameter valve springs only.

Stock stroke and bore (070 over bore ok) stock length rods. 

No light weight rods or No billet rods.

No H beam rods.                                            I beams rods or stock replacement rods.

Crank 48lbs. No cutting on crank .Cast steel only, no forged.

Flat top or dish pistons only.

Floating or pressed pin rod ok.

No lightning, knife edging. Balancing ok only

May run up to a 1 inch carburetor spacer

Valve Sizes

Chevy-2.02/1.600

Ford-2.02/1.600

Ford(Boss or 35im35ic)-2.19/1.72

Chrysler-2.02/1.600

 

Any OEM FORD head allowed.

Boss or 4-barrell Cleveland heads must add 100 pounds.

 

Track reserves the right to adjust these rules at any time to promote fairness of competition.

 

Protest Rules

 

Pull Valve Cover - $50 (track keeps $25)

Pull First Head - $300 (track keeps $100)

Pull Second Head - $100

Pull Heads, Intake, Carb and check Bore & Stroke - $400 (track Keeps $100)

Pull Oil Pan - $300 (track Keeps $50)

 

Any car in any division that wins 3 total events will be impounded by track officials. Track reserves the right to inspect tires, wheels, body, engine and anything deemed necessary to promote fairness.