NASCAR TECHNICAL BULLETIN UPDATE

NASCAR issued a technical bulletin Thursday, Sept. 6 that reconfirms the limits NASCAR Sprint Cup Series teams can go in setting up their rear end suspensions in their race cars. Effective Sept. 12, the truck trailing arm front mounting bushing assemblies may be built to allow a maximum of ¼ inch of total movement in one direction only. Truck trailing arm front mounting bushings must be designed to move freely throughout the ¼ inch of approved travel. Previously approved front truck trailing arm bushing assemblies which allow more than ¼ inch of movement or that do not move freely throughout the ¼ inch travel will no longer be permitted for use in competition. Approved front truck trailing arm bushing assemblies must not be altered after being approved. Wheelbase, rear axle location (parallel), offset and rear axle housing alignment will be inspected both pre-race and post-race.

Continue reading “NASCAR Technical Bulletin Update: Rear-End Suspension Limits”