Drivers must be a minimum of 14 years old with no exceptions. Certified copy of birth certificate is required. At his sole discretion, the Race Track Promoter has the authority to permit an underage driver to participate in this class.
FUEL BLADDERS OR RCI FUEL SAFETY SYSTEMS ARE REQUIRED ON ALL CARS - NO EXCEPTIONS!
Roll cages shall be at least 1-inch .062 wall thickness, or 1 1/8 inch .065 wall thickness, or 1 ¼ inch .065 wall thickness. Roll cage shall be made of chromoly steel or equivalent material. The front section of the cage shall be no further back than the steering wheel. Roll cage shall have sufficient fore and aft bracing and strength to support the weight of the car and driver in case of an upset. Cage shall have gussets at the intersecting bars to the uprights. Bends must have at least 3-inch radius. No square or pointed corners allowed. Roll cage must be a minimum of 3 inches above the driver’s helmet. It is mandatory to install a cross brace behind the seat to support the shoulder harness.
Cars must have bumper extending beyond the front and rear tires. Nothing may extend beyond a tangent line from the outside edge of the tires to the bumpers. Nothing may extend beyond the outside edge or the tires or wheels, whichever is the widest. No sharp corners or designs as to hook or damage. All cars must be equipped with nerfing bars. Nerfing bars must extend to inside edge of tires, but not beyond the outside of tire.
On and off switches must be on dash, top of the cowl or on steering wheel. On/off switch must be connected and functional. No radio communication is allowed with the car or the driver.
All wet cell batteries mounted in the cockpit must be covered and vented outside the cockpit area.
All A Class cars must run Nationally approved fuels. NO ADDITIVES ALLOWED.
4 cylinder 600cc powered cars; minimum car and driver weight is 750 lbs.
Tread; Maximum 50 inches. Minimum 32 inches, center to center of tires. Wheelbase: Maximum 70 inches. Minimum 50 inches, center of front axle to center of rear axle. Steering; Front wheels must be connected by a solid or tubular tie rod. Rear wheel drive only. All suspension bolts except wheel nuts must be secured by some type of locking device.
Any shock absorber legal.
BRAKES
Brakes will be of sufficient strength so as to slide the wheels while the car is in motion at any given time.
TIRES AND WHEELS
Any wheel size and tire combination may be used, but tires may not exceed 22 ½ inches in height. Wheels must be held on with 4 or more standard lug nuts or knock-off hubs. Right rear tire must be a minimum 50-durometer compound Hoosier or American Racer tire. Siping and grooving are allowed. Tire durometer check should be done at least 15 minutes after the races to allow for cool down. Air bleaders are allowed.
Motors must have transmission with all stock gears in working order. Any car equipped with a shifting mechanism must have this device mounted in the driver’s compartment. Chain guards will be made of .090-inch thick aluminum or equivalent and will run on top of chain from the front of the front sprocket to the center of the rear axle. Driver must not be able to touch the chain or sprockets while sitting in the cockpit.
All cars must have complete bodies. Tail sections must be in place for time trials and all races. There must be a metal firewall between driver and engine, made of 24-gauge steel or .0625” aluminum. Body of car must be made of aluminum, metal, fiberglass or high impact plastic. All cars must be an attractive color or colors. No rear view mirrors allowed. The only part of the car allowed to be dismantled for driver to enter or exit is a quick release steering wheel hub. Mudguards must be made of aluminum or fiberglass, and can be no less than 16 inches from the top of the cage. No mechanical, electrical or hydraulic adjustments will be allowed in the cockpit area. All fuel tanks must be equipped with a one-way check valve designed to prevent spillage of fuel in the event of a rollover.
All cars will have top wings at least 10 square feet, and a maximum of 16 square feet.
Mufflers are mandatory and must keep the car at 95 decibels or less. All mufflers must be packed, and checked routinely to ensure full packing is in place. No super trapps allowed.
All motors must start out as production 636cc or less four cylinder four stroke engines. Modifications may be made after that point. All cars must have a noise eliminating exhaust. Motors originally manufactured with more than 636cc will be illegal. No motor manufactured with more than 636cc is legal.
SAFETY RULES
NOTE: Cars, parts, components, and/or equipment will not be considered as having been approved by reason of having passed through inspection at any time or any number of times unobserved or undetected.
Unless these specs say you can do something, you cannot.
Last Updated: March 1st, 2010