USAC TECHNICAL UPDATE – TB2016-SP002

SPRINT CAR SERIES (AMSOIL National, CRA, West Coast and Southwest)

Date: May 19, 2016

Date Effective: May 19, 2016

TITLE: Car Construction

304 Roll Cage and Chassis

A. All cars must have a roll cage, which is integral with the frame anddoes not encroach upon an imaginary cylinder, 20 inches in diameter, extending through the top cockpit opening directly above the seat. The roll cage should extend four (4) inches above the driver’s helmet when seated in the driving position.

B. The following are the minimum frame/chassis material requirements.                                                                                 

     Must be constructed of 4130 normalized tubing

     TOP RAILS 1 1⁄2” x .095”

     BOTTOM RAILS 1 3/8 x .083”  

     ROLL CAGE UPRIGHTS 1 3/8” x .083”

     ROLL CAGE CROSSMEMBER 1 1⁄2” x .095”

     UPPER RAILS 1 3/8” X .083”

     REAR END SAFETY BAR HIGHLY SUGGESTED 1” x .083”

     Maximum width of main frame tubes 29 1⁄2 inches