#266715. USAC - United States Auto Club | USAC Racing USAC (United States Auto Club) is an open-wheel auto racing sanctioning body for Mopar Midget National Championship, Sprint Car Series, Silver Crown Series and Ford Focus Series. USAC Racing website provides you with latest news, schedules, blogs, general information and live feeds from the track. Usacracing.com~Site InfoWhoisTrace RouteRBL Check