Sprint cars are purpose-built open-wheel racers designed for short oval tracks, predominantly dirt. They run naturally aspirated methanol-injected V8 engines displacing 410 cubic inches (6.7 liters), capable of revving to 9,000 rpm. A separate 360-cubic-inch class produces around 775 horsepower and provides a more accessible entry point. Crucially, sprint cars have no traditional transmission — they run a direct-drive system and require a push start from a truck each time they need to get moving.
The defining visual feature is the large overhead wing on winged sprint cars, which appeared in 1958 and became widespread through the early 1970s. Wings provide downforce and prevent the cars from going airborne in accidents. Non-winged (wingless) sprint cars represent the traditional pre-wing format and remain popular in USAC competition, demanding more car control and producing different racing dynamics.
World of Outlaws Sprint Car Series (formed 1978) is the top-tier national touring series for 410-cubic-inch winged sprint cars. It runs February through November on dirt tracks across the country, with the Knoxville Nationals in Iowa as its unofficial crown jewel event.
USAC National Sprint Car Championship sanctions the premier non-winged 410-cubic-inch class on both dirt and asphalt. USAC also governs midgets and Silver Crown cars, making it the sanctioning body of record for the traditional American open-wheel ladder that produced Indianapolis 500 winners for decades.
All Star Circuit of Champions (founded 1970) is a regional touring series running 410-cubic-inch winged sprint cars across Ohio, Pennsylvania, and neighboring states. It functions as a developmental and alternative circuit to the World of Outlaws.
American Sprint Car Series (ASCS) sanctions both winged and wingless formats across regional divisions throughout the midwest and south.
The sprint car lineage connects directly to the roots of American motorsport. A.J. Foyt, Mario Andretti, Al Unser Sr., Jeff Gordon, and Tony Stewart all cut their teeth in sprint cars before reaching NASCAR or IndyCar. The discipline tests mechanical sympathy, throttle control on loose surfaces, and an instinct for car positioning that no other form of racing replicates.
Key venues include Knoxville Raceway (Iowa), Eldora Speedway (Ohio), and Williams Grove Speedway (Pennsylvania). Sprint car racing also has a significant following in Australia, where the World Series Sprintcars has run since 1987.
Sprint car racing is represented in [[dirt-rally|iRacing's]] dirt oval platform and in dedicated titles like [[sprint-car-racing-game|World of Outlaws: Dirt Racing]], which licenses the WoO brand and Knoxville Raceway. The cars' direct-drive, push-start character and the loose dirt surface create a handling model unlike anything in asphalt sim racing.
[[world-of-outlaws|World of Outlaws Sprint Car Series]] — premier national 410-winged touring series
[[usac-racing|USAC National Sprint Car Championship]] — top non-winged open-wheel dirt championship
[[knoxville-raceway|Knoxville Raceway]] — home of the Knoxville Nationals, sprint car's biggest race
[[dirt-oval-racing|Dirt Oval Racing]] — the broader discipline sprint cars belong to
[[indycar|IndyCar]] — the major open-wheel series many sprint car graduates reach
[[eldora-speedway|Eldora Speedway]] — iconic Ohio dirt oval central to sprint car history