For more information please contact Matt Lagoon 0408 834 265 or email him here
 

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About the cars

All cars, regardless of engine displacement, weighed a minimum of 3500lbs (1590kg) ready to race (including fuel, oil, water, etc but without the driver).

A minimum right-side weight of 1600lbs (728kg) had to be maintained.

The body or frame cannot be lowered and the body cannot be offset.

Minimum roof height is 50.5 inches.

Minimum ground clearance (front spoiler) is 3.5 inches.

All cars must have complete bodies, hoods, fenders, bumpers and grilles in top quality condition: no aluminium, light alloys or fibreglass substitutes permitted.

Cars must be equipped with a complete set of correct make and model bumpers and must remain standard in appearance: no streamlining of headlights, radiator grilles, windshield tops or underpans is allowed.

The grille must be the stock-standard height and width and mounted in the stock location.

All doors must be welded to the fender and quarter-panels.

The floor must be complete and in the standard position, with no tunnels or air ducts.

Only standard, factory-manufactured floor pans are allowed.

Approved spoilers are non-adjustable.

Chassis/Suspension
Stock Car approved  frames may be used on all approved models.

The massive, purpose-built chassis utilizes heavy-duty coil springs and telescopic shock absorbers all round and additional sway bars are permitted.

The front A-frame independent suspension members are as specified and the live rear axle is located by box-section trailing arms, as per regulations.

Passenger car-type and length trailing arms may be used in addition to the pick-up truck trailing arms.

Wheelbase is set at 110 inches and the maximum allowable outside frame rail width is 60 inches.

15-inch diameter wheels are reinforced steel approved items, with a maximum 4.5 inches of offset and a maximum rim width of 9.5 inches.

All four wheels must be of the same design, size, diameter and offset at all times.

Only approved  tyres are permitted.

Drivetrain
A high-speed multiple-disc clutch is permitted but the choice is limited to steel disc assemblies and do not include aluminium or light-alloy assemblies.

Bell-housings and four-sided transmissions are specified; the final top-gear ratio being 1.00:1.

No Jerico transmissions are allowed in speedway competition.

Rear-axle ring and pinion gear ratios are 3.9:1 at the Thunderdome, 5.43:1 at Adelaide International Raceway and 'free' for road courses.

Detroit locker-type limited-slip differentials acceptable and are permitted.

Engine
305-358 cubic inch V-8 engines equipped with a single Holley 4150 series four-barrel carburetor.

Only small-block V8 engines were allowed and the engine displacement may be increased or decreased by boring or stroking.

The total displacement must not exceed 358.00 cubic inches.

Approved Chevrolet engines are: 307, 327, 350 and 400ci (the latter must have its capacity reduced to 358 cubic inches).

Ford approved engines were the 302 and 351ci models.

Internal polishing, porting, altering and/or relieving of engine parts are permitted.

Any piston may be used but only approved connecting rods are allowed.

Cylinder heads are permitted to have only steel or titanium valves, with a limit of two per cylinder.

Valve sizes were not restricted and valves may be lightened.

Aluminium high­ performance heads were permitted.

Cylinder heads approved for Stock Car racing were permitted through July 31, 1996, however, with respect to those heads approved for General Motors, the valve angles were no less than 18 degrees.

On the cylinder heads approved for Ford, the valve angles were no less than 7.5 degrees and parallel.

The crankshaft must be standard steel production design.

Any steel camshaft can be used, but roller tappets are not allowed.

The flywheel is of steel.

Please make yourself familiar with these racing terms... Click Here