RACING REGULATIONS FOR F4 CARS
1) The car must satisfy all general
requirements that are listed in the current
applicable C.A.S.C. Race Regulations year book, with
the following exceptions:
a) An emergency brake is not required
b) Fuel is allowed as stated under engine
c) A self-starter is not required
2a) The combined weight of the car
and driver including all required driving apparel
(this includes all coolants, lubricants, and fuel
remaining) must not be less than 370 kg (or
approximately 825 lbs.). (Rule came into effect at
the beginning of the 2001 race season).
2b) Rule #2a shall not apply to cars with motors
described in Rule #3c.
3) The engine must be based on a
production engine (i.e. more than 1000 of the model
manufactured) and must conform to the following
a) Must not exceed the first manufacturers over-bore
to give a greater displacement than 750cc maximum.
b) Have a maximum displacement of 750 cc and be of
either a two stroke cycle or four stroke cycle. All
engines must be normally aspirated. Two strokes may
use any commercially available gasoline. Four
strokes may use 100% alcohol or a alcohol/gasoline
blend. Nitrated fuels may not be used.
c) 4 cylinder four strokes with 2 valves per
cylinder and 2 stroke Suzuki GT 750's 1972- 1978 may
have a maximum displacement of 850cc.
4) The car must be a single seat,
four open-wheeled racing car with safety equipment
conforming to the current General Racing Regulations
as published by the CASC. The following restrictions
apply: COACHWORK - All external parts of the car
which are in the airstream and situated above a
plane passing through the centre of the wheel hubs,
with the exception of units definitely associated
with the function of the engine, or the
transmission, or the safety roll bar.
a) No part of the coachwork, with the exception of
the safety roll bar, shall exceed in height a
horizontal plane of 900 mm (35.43 inches) from
roadway with driver normally seated. The roll cage
shall not exert aerodynamic influence on the car.
b) Behind the front wheels, no part of the coachwork
may extend beyond a vertical plane passing through
the centre line of the wheels on either side of the
c) The coachwork ahead of the front wheels may
extend to the outer sides of the front tires.
d) Any coachwork which is in front of the front
wheels and extends the inner faces of the front
tires, must not extend above the height of the front
e) Any specific part of the car which has an
aerodynamic influence on the stability of the
vehicle must be mounted on the entirely sprung part
of the car and shall be firmly and immovable fixed
while the car is in motion.
5) All two-stroke engines must be
equipped with a muffling device on each exhaust
Revised November, 2007