USC general track rules supersede car division rules. 2008 division rules supersede all previous editions of the rules for THUNDER BOMBER.

COMPETING MODELS

Any American made or foreign full size or compact passenger car.  No trucks allowed.  There is no minimum wheel base requirement.

ROLL CAGE

All cars must have a full roll cage per the 2008 Safety Rules.  Front loops are optional but recommended.

CHASIS

The chassis must remain the same as the body being used.  Camaro for Camaro etc.

SUSPENSION

Springs and shocks must remain stock OEM type and must be mounted in the stock location.  No racing springs or shocks.  The body must remain in the stock position on the frame. 

DRIVETRAIN

Motor and transmission must be OEM and must be mounted in stock position.  No aftermarket heads.  Flat top or dished pistons only.  OEM type cast iron intake and exhaust manifolds are required.  Headers are not allowed.  Two (2) barrel carburetor maximum 500 CFM, or stock fuel injection on V6 or 4 cylinder engines are required.  Carburetors must remain unaltered inside the venturies.  A maximum 1/2" tall spacer/adapter plate may be utilized for mounting the carburetor.  Turbos are not allowed.  Stock OEM ignition systems and components must be utilized.  Engine must be able to pull 14 inches of vacuum @ 1000 RPM.  All automatic transmissions must have an operational torque converter.  Manual transmissions must have an OEM type clutch, no racing clutches or pressure plates.  “Locked” rear-ends are permitted.

FUEL TANK

The fuel tank must be mounted inside of the trunk compartment.  Tank must be properly secured in trunk with one (1”) inch steel strap no less than two lengthwise and two crosswise straps.  Trunk pan must provide protection from objects coming up under the car.   Fuel cells are optional but are highly recommended.  If fuel line is run through the driver’s compartment, it must be secured inside of conduit.

FIREWALLS

Front firewall must remain unaltered.  Holes must be covered with .020 gauge steel.  A steel firewall not less than 20-gauge thickness must be located between trunk and driver. Fuel tank must be filled from inside trunk area.  No filling tubes extending to outside of the trunk.  Fuel lines ran inside of the vehicle must be protected by one (1”) conduit.

WHEELS

Seven (7”) inch wide wheels maximum width.  Stock or aftermarket wheels are allowable.  No aluminum wheels.  No wheel weights allowed.

TIRES

No racing tires.  Tires must be made for passenger vehicles.  Tires may not exceed eight (8”) inches width measured at the tread pattern.  Tires may be grooved.

EXHAUST

Single exhaust must be 2” maximum diameter x 40” long from the “Y” for V8 motors, 1 ½” maximum diameter X 40” long from flange for 6 cylinder and 1 ¼” maximum diameter X 40” long from flange for 4 cylinder engines.