From the front of the car to a point 12 inches behind the centerline of the front axle, the cars must maintain a minimum ground clearance of three inches. The remainder of the car must have a two-inch clearance with the exception of the oil pan and exhaust headers. The front overhang may not exceed 40 inches, measured from the centerline of the front spindle. The underside of the body, including roof area, must be covered with a flame-retardant covering or coating. A fire-extinguishing system is mandatory.
Air pressure is a low four pounds.
Most Funny Cars use a 23x5x15-inch front tire. Fuel The powerful elixir that helps coax more than 10 horsepower from every one of the engine's 500 cubic inches is the fuel, nitromethane. It originally was produced in the 1800s and has been used widely as an organic solvent in the chemical industry during the last 50 years. The brakes, activated via a hand lever in the cockpit, are utilized on all four tires, but the car's primary braking system is a pair of parachutes that can produce up to five negative G forces of stopping power, enough to throw even a well-belted driver forward a few inches. Rear Spoiler Per NHRA guidelines, the rear spoiler must be mounted on, not built in, to the body.