TRES CUARTO RULES

Turbo Crossbolts

Turbo crossbolts 3” from the turbine wheel for safety are mandatory.

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Engine Containment Device

Engine diaper or catch pan device to capture oil and/or debris is mandatory. If a catch pan device is used, catch pan must have a minimum 2-inch-high lip on all sides. Lips must be covered or curved inward, so as to contain oil in pan. Catch pan must cover entire area below the engine. Catch pan must extend from radiator support to firewall and from frame rail to frame rail. In all cases, lips must be adequate enough to contain oil in the catch pan. Should a competitor spill excessive oil from the catch pan and debris onto the track, he or she may be disqualified from further competition at the sole and absolute discretion of the event director.
 

Beam Tripper

A front beam tripper is permitted but can only extend 45” forward of the centerline of the front wheel.

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Engine Coolant

Only water is permitted in the coolant system. Antifreeze or other additives are prohibited.

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Hybrids

Import engines in Domestic bodies or Domestic engines in Import bodies are prohibited. All cars must be either Import bodied/powered or Domestic bodied/powered.

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Body

Must have an import body or a domestic sport compact body. Any year vehicle is allowed. Lightweight components are limited to hood, front fenders, decklid, hatches, sunroofs, wings, ground effects, bumpers, doors, and roof only. Quarter panels must remain steel. One-piece front ends are permitted. No body parts may be removed during competition.

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Chassis

All cars may run 3/4 chassis but must retain firewall and OEM strut towers in OEM location and be within 2” of OEM wheelbase. VW cars must use OEM frame only. Aftermarket “K” members are permitted.

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Suspension

All cars must utilize stock mounting points for front suspension in the stock location. Any type rear suspension is permitted. Aftermarket front and rear control arms, struts, and shocks are permitted. Sub-frame connectors are permitted. Wheelie bars are permitted on all cars.

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Windows

OEM glass or lexan windows are permitted. If you are using aftermarket doors or lexan windows, then a steel frame around the lexan window or a window latch is required.

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Transmission

Any type transmission is permitted. Trans-brakes are permitted. Aftermarket bell housings are permitted.

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Clutch

Any style clutch is permitted.

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Shifter

Any style shifter is permitted. Strain gauges are permitted.

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Fuel

Any fuel is permitted.

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Engine

OEM or Aftermarket blocks are permitted.

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Turbocharger

Turbochargers are measured at the inducer wheel where the leading edge of the inducer wheel meets the housing. Compressor cover must be unmodified, it must be run the way it comes from the manufacturer. No porting of the surge port allowed.

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Nitrous Oxide

Any style nitrous oxide system is permitted for combinations that allow nitrous oxide. If nitrous oxide is not permitted for your combination, then bottles and solenoids must be removed from car and nitrous nozzles must be capped.

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Tires

Slicks or DOT bias ply tires are limited to 32.0”x14.5” or 33"x10.5W" (Tires are checked by sidewall designation)

Radials limited to 275/60/15