IHRA Official Rulebook
Heavier gauge and/or plate steel not permitted - frame reinforcing cross members, or the addition of any safety equipment such as roll bars, flywheel covers, etc.
Figure 1: Ballast BATTERIES: All wet-cell batteries must not be relocated into the driver or passenger compartments and must be securely mounted. A maximum of two (2) automobile batteries are permitted of 150 Ibs. combined maximum weight. Plastic battery hold- down straps are not permitted. All relocated batteries must be secured with a minimum of 2 3/8 diameter bolts or rods. When relocated to the rear of vehicle, the passenger compartment must be protected by a “firewall” consisting of a minimum of .024 steel or .032 aluminum. A switch must be connected to the positive side of the electrical system and when de-activated shut off all electrical functions in the vehicle. BODIES: Each car in competition, regardless of class, must be equipped with some kind of body (in addition to the frame structure), surrounding the driver and extending forward to the firewall. Bodies must be made of flame proof material, and be constructed so as to prevent the driver’s arms, legs, or body from coming in contact with wheels, tires, or exhaust system. This includes dragsters. Bodies which have been gutted must have all sharp edges or projections removed from the inside of the body to protect driver from cuts or lacerations and must be suitably reinforced and permanently mounted to the frame or frame structure. Commercially produced fiberglass copies or carbon fiber of American automobile bodies will be permitted in some eliminators, providing all dimensions are the exact duplicates of the original American automotive manufacturer’s body. Car must meet all Class Requirements. BRAKES: Brakes must be in good working order. All Funny Cars must be equipped with one (1) disc brake on each wheel. A minimum of two (2) hydraulic brakes are required on all open bodied cars, all full bodied cars must have 4 wheel brakes. Master cylinder must be above frame. Application and release must be a direct function of the driver. The use of electronic, pneumatic or any other devices may in no way affect brake operations. All entries with aftermarket brake systems must incorporate a positive stop that will prevent the pedal from extending over center. All line locks must be self-returning upon release of switch and return system to normal operating mode. Secondary brake systems permitted. Automated braking systems prohibited. Brake operation must be a direct function of the driver. Electronics, pneumatics or any otherdevice may not assiet oraffect brake operation. BRAKE LINES: Brake lines must be routed outside the frame or enclosed in a 16” length of 1/8 inch (minimum) walled steel tubing, securely mounted, where it passes the flywheel bell housing area. Copper brake lines prohibited. CHASSIS CERTIFICATION: IHRA chassis certifications are mandatory on all entries running 9.00 or quicker 1/4 mile, or 6.00 or quicker 1/8 mile or an any entry that exceeds 150 MPH. Sportsman or 7.50 and slower certifications (blue tag) expire 3 years from the date of certification. Pro or 7.50 and quicker certifications (maroon tag) expire 2 years from the date of certification. See Class Requirements and SFI Specifications. CLUTCH: Each car in competition, except those with automatic transmissions, must be equipped with a foot-operated clutch incorporating a positive stop to prevent clutch from
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