Originally Posted by
Turbo3Iroc
STREET RACE CATEGORY
Street Race is for cars with OEM bodies and frames.
Aftermarket bolt-on front suspension, K-members, and front clips are allowed, but bolt-on front clips must use double-A-arm suspension with coil springs, coilovers, or airbags. Nonstock strut front suspension conversions are not allowed. Rack-and-pinion conversions are allowed.
Rear suspension may use aftermarket bolt-on parts but must be of the stock concept: OE leaf-spring cars must use leaf springs, OE-triangulated four-link cars must use triangulated four-links, OE torque-arm cars must use torque arms, and so on. Corvettes '64 and up must retain IRS. Mustang Cobras that came stock with IRS may use solid axles if stock triangulated-four-link suspension is used. Bolt-in or weld-in parallel four-links are not allowed. Ladder bars are not allowed. Typical mini-tub techniques such as relocating the leaf springs inboard and relocating shock mounting points are allowed. Stock rear framerails in the stock locations must be retained but may be notched for tire clearance. Weld-in rear sway bar kits are allowed.
Street Race cars must use tires on the dragstrip that are no greater than 11.25 inches wide at the tread as measured installed and on the ground with a go/no-go gauge. Tire edges may not be shaved or cut to meet the 11.25-inch maximum. Street radials and drag radials of any size are allowed on the dragstrip.
The following are required: driver and passenger seats, fully upholstered interiors, and a windshield of OE-type glass. There are four Street Race classes based on engine displacement and induction: Small-Block Naturally Aspirated, Small-Block Power-Adder, Big-Block Naturally Aspirated, and Big-Block Power-Adder. Naturally Aspirated classes may not use power-adders of any kind. Power-Adder classes may use nitrous, superchargers, turbochargers, propane injection, or any combination thereof. Small-Block classes are 430 ci and below. Big-Block classes are 431 ci and above, including Mopar Hemis, big-block Chevys, big-block Fords, or FE Fords of any displacement. Winners' engines may be pumped to verify displacement.