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A. J. Foyt driving a Championship Car in 1984. From 1956 to 1978, the United States Auto Club (USAC) sanctioned Championship Car class featured the top teams and drivers in U.S. open-wheel racing. Until 1971, races included road courses, ovals, dirt courses, and, on occasion, a hill climb. Thereafter, the schedule consisted mainly of paved ovals.
The existing USAC National Championship was a mixture of road courses, hill climbs and paved or dirt oval races. For the 1971 season this championship switched exclusively to paved ovals. Especially on the paved ovals rear-engined cars dominated the races whereas on the dirt ovals the front-engined cars were superior.
The USAC/CRA AMSOIL Sprint Car Series debuted in 2004 utilizing the same cars and 410ci engines that race in USAC's AMSOIL National Sprint Car Championship at dirt oval tracks across California and Arizona. The series also features combination races with the AMSOIL USAC Sprint Car National Championship. Champions
The USAC National Champion and Indianapolis 500 winner was Al Unser. After this season, dirt courses did not reappear in the USAC Championship until 1981-82. Road courses after this season did not reappear in the USAC Championship until 1977. The Pikes Peak Auto Hill Climb was the only non-championship event.
A.J. Foyt ran his first national championship race there in August 1957. The track is host to two of the older memorial events in the United States, the Bettenhausen 100 for the USAC dirt championship cars, first run in 1961 and the Allen Crowe Memorial 100 stock car event for USAC, now ARCA, stock cars, first held in 1963. Both races are now ...
The 1972 USAC National Dirt Car Championship was the second season of the USAC National Dirt Car Championship. [1] The season champion was A .J. Foyt. Schedule and ...
The 1969 USAC Championship Car season consisted of 24 races, beginning in Avondale, Arizona on March 30 and concluding in Riverside, California on December 7. The USAC National Champion and Indianapolis 500 winner was Mario Andretti .
The 1981–82 USAC Championship Car season consisted of six races, beginning in Speedway, Indiana, on May 24, 1981, and concluding at the same location on May 30, 1982. The USAC National Champion was George Snider. The season included two Indianapolis 500 races. The 1981 winner was Bobby Unser, while the 1982 winner was Gordon Johncock.