. "Champ Car was the name for a class and specification of open wheel cars used in American Championship car racing for many decades, associated primarily with the Indianapolis 500. Such racing was sanctioned by the AAA, USAC, SCCA, the CRL, CART, and IndyCar.In its most popular and recent contemporary usage, \"Champ Car\" was the name given to a governing body formerly known as Championship Auto Racing Teams (CART)."@en . .