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ARTICLE 6 VEHICLE CATEGORIES AND PREPARATION
6.1 ELIGIBLE VEHICLES
A RallyCross event is open to any fixed-roof production based vehicle (including convertibles with a factory hardtop attached, targa-types with factory panel in place, t-tops with factory panels in place) that can pass safety inspection. If the Event Chairman after consultation with the Event Safety Steward determines at his discretion that a vehicle cannot safely negotiate the course, it may be excluded.
6.2 VEHICLE CLASSIFICATION
A. Regions and Divisions may specify local classes providing they are clearly described and that event organizers realize that a dual-scoring system must be used to score events both for local points and for divisional and national championships (when applicable).
B. All items that are not specifically allowed or referred to as unrestricted must be of manufacturer’s specification.
C. Rally Stock Category
Stock Rear Wheel Drive (SR)
Stock Front Wheel Drive (SF)
Stock All Wheel Drive (SA)
Preparation allowances:
1. All Cars must be equipped as from the manufacturer, with only
factory-installed and port-installed option packages. Options that were only part of a package must be present with the entire package. Complete option packages may be installed after purchase of the vehicle.
2. Tires must be DOT approved. Snow tires are allowed. No studded tires are permitted unless ice or snow are present. Studded tires may not be homemade using bolts or screws. Only street-legal studs are allowed. Tires may not interfere with any parts of the car (fenders, fender liners, suspension, etc). “Aggressive” tires are prohibited. A tire will be considered an “aggressive tire” if it meets any of the following criteria:
a. It does not carry a DOT approval.
b. It is marked “For competition only”, “Not for street use” or similar verbiage.
c. It is modified or altered from its original tread pattern in any way.
d. The tread gap of the tire is equal to or greater than 0.34” as measured in the space between any tread blocks. This does not apply to any circumferential grooving that may be part of the original pattern of the tire.
3. Air filter material is free, but it must fit in the stock location.
4. The additions of protective equipment are allowed with the following exceptions:
a. The modifications must only provide protection to the car and/or occupants and provide no performance advantage.
b. Mud flaps may only be made of urethane and other flexible plastic derivatives (i.e. no carbon-Kevlar)
c. Skidplates protecting suspension and drive train components may only be made out of metal or plastic derivatives.
d. Driver restraints and roll cage may be added.
e. Additional or replacement hood and trunk latches are permitted. All latch systems must be secure.
5. Dress-up and convenience items which do not give a performance advantage, reduce the weight of the car, or weigh less than the replaced standard part they are replacing are allowed (i.e. shift knobs, pedal covers).
6. ABS and/or traction control systems may be electronically/electrically disabled but not removed.
7. Vehicle lights may be replaced with alternate bulbs and housing. Auxiliary lights may be added. The total number of lights shall not be less than standard.
8. Brake pad material is free.
9. Fuel may be any type of unleaded or diesel fuel commonly available at the pump. Alternative fuels must be pre-approved by the event RallyCross Safety Steward prior to the event. No alcohol fuels or nitrous oxide are allowed.
10. Clutch material is free.
11. Exhaust systems from the catalytic converter back are free with the following exceptions:
a. The exhaust must exit the body work.
b. The exhaust must exit to the rear of the driver.
c. The exhaust must comply with local noise restrictions
D. Rally Prepared Category
Prepared Rear Wheel Drive (PR)
Prepared Front Wheel Drive (PF)
Prepared All Wheel Drive (PA)
Preparation allowances:
1. All Rally Stock category modifications are allowed.
2. Sway bars and their mounting are free.
3. Brakes are free except no carbon brakes allowed.
4. Exhaust systems from the cylinder head exhaust ports back are free with the following exceptions:
a. The exhaust must exit the body work.
b. The exhaust must exit to the rear of the driver.
c. The exhaust must comply with local noise restrictions.
d. Downstream there must be at least one functioning catalytic converter in the exhaust system on cars originally equipped with a catalytic converter.
5. The intake system upstream from the throttle body is free. Under no circumstances may forced induction components be changed or added (turbochargers, superchargers, intercoolers).
6. Short shift kits are allowed.
7. Front and/or rear strut tower bars are permitted.
8. Shocks are free but the shock/strut must mount to the original mounting position using unmodified mounting points. Springs may also be replaced, but they must be of the same type and use original mounting points. Threaded collars and camber plates are allowed.
9. Electronic engine controls may be modified or piggybacked, but not replaced.
10. Any tire is allowed except homebuilt studded tires.
11. Seats are free but must be solidly mounted.
12. Any non-metallic bushing is allowed.
13. Wheels are unrestricted.
E. Rally Modified Categories
Modified Two Wheel Drive (M2)
Modified All Wheel Drive (M4)
Preparation allowances:
1. All Rally Prepared category modifications are allowed.
2. Electronic engine controls are free.
3. Any replacement hood may be used.
4. The clutch is free.
5. Any car that is currently legal for stage rally competition in other sanctioning bodies may run in its appropriate Rally Modified class regardless of whether it meets the Rally Modified rules.
6. Glass, with the exception of the front windshield, may be replaced with lexan or equivalent.
7. Engines are free but must be internal combustion.
8. Drive train is free.
9. The suspension is free. This allows changes to all components and geometry.
10. Body work may be added or substituted with any material.
11. The interior components may be completely removed and/or replaced.
12. Additional chassis braces and seam-welding are permitted.
13. All log booked race cars that meet entry requirements are legal for the proper Modified class.
14. The fuel system is free provided gasoline or diesel fuel is used.
6.3 VEHICLE/DRIVER SAFETY
All vehicles must pass safety inspection on the following points prior to competing. This applies at each event entered. Entry fees, if already paid, will be refunded if a car fails to pass the safety inspection. A safety inspection is not concerned with class compliance.
A. All loose items, inside and outside the car (including the trunk and storage areas), must be removed.
B. Snap-on hubcaps, detachable fender skirts and trim rings must be removed.
C. Convertible, targa, or t-top vehicles must have their factory hard top or panels securely in place during course runs.
D. Sunroofs must be fully closed unless vehicle is equipped with a net at the opening and/or the driver is wearing arm restraints.
E. The driver’s window may not be down more than 1” during course runs
unless the vehicle is equipped with a window net and/or the driver is using arm restraints. The same restriction applies to the passenger window if there is a passenger.
F. Wheels must be safely affixed. They shall not be reversed so that the lughole taper does not mate with the chamfer of the lugs. All studs and lug nuts must be present, installed correctly and functional.
G. Tires must be in good condition, with no cord or belts showing or cracks in the tread or sidewall.
H. Seat lap belts are required in all cars. Installation of shoulder and lap belts is strongly recommended. Seat/shoulder belts must be properly installed with attaching hardware secure and tight. Additional belts must be installed per the manufacturer’s recommendations.
I. Throttle return action shall be safe and positive.
J. No excessive fuel, oil, water or brake fluid leaks should be observed when the engine is running.
K. Steering wheel "spinner" knobs are not permitted.
L. Brakes must have an adequate pedal, sufficient fluid in the master cylinder and no apparent hydraulic leaks and shall be operational at all four wheels. The vehicle must have a working parking/emergency brake
system.
M. Wheel bearings, shocks, steering, and suspension shall be in good
operating condition.
N. All batteries (on board power supplies) shall be attached to ensure that the battery and/or power supply will remain in place. If a lead-acid (wet cell) type battery is located in the drivers/co-drivers compartment it must be equipped with leak-proof caps and enclosed in a non-conductive, marine type box. Dry cell batteries, commonly known as Recombinant Gas (RG) or Glass Mat Technology (GMT) batteries, are not required to be in a marine-type box. The hot terminal must be insulated on all vehicles. All batteries shall be securely attached to the primary structure of the vehicle.
O. Roll cages are strongly recommended in all cars. If installed it is strongly recommended that roll cages be constructed according to the rules for stage rally competition used in other sanctioning bodies.
P. Snell 1995 (SA95, M95, or K98) or newer labeled helmets are approved for use. This is a minimum standards for use in RallyCross, other approved helmets are:
1. British Standards: BS 6658-85 type A/FR, including all
amendments.
2. SFI Foundation, Inc; SFI Spec 31.1
Colorado RallyCross events are part of the Sports Car Club of America