Cosworth
One of the most successful and longest-lived projects of Cosworth has been its CART / Champ Car engine program. In 1975, Cosworth developed the DFX engine. A turbocharged 2.65 litre engine, the DFX became the standard engine to run in IndyCar racing. It ending the reign of the Offenhauser, and maintaining that position until the late 1980s.