Porsche first attempted to compete in the 1980 Indianapolis 500 with an engine initially based on the 935 sports car flat 6 with Interscope Racing as the entrant and Danny Ongais as driver, but withdrew after engine rules were changed under the pressure of top-level teams. German manufacturer return to CART in 1987 season and raced as works team with March chassis and Porsche engines until 1990. In the 1990 season the team used March 90P chassis and expanded to two cars, fielding Fabi in the #4 Foster’s/Quaker State March 90P-Porsche and John Andretti in the #41 Foster’s March 90P-Porsche. Fabi would qualify on the pole position at the Texaco/Havoline Grand Prix of Denver at the Streets of Denver and would finish 3rd at the Marlboro Grand Prix at the Meadowlands at the Meadowlands Sports Complex but would drop to 14th in points. While Andretti would get a best finish of 5th at the Budweiser Grand Prix of Cleveland at Burke Lakefront Airport and at the Molson Indy Vancouver at the Streets of Vancouver and would finish tenth in points. Porsche withdrew from IndyCar at the end of the 1990 season. Team director Derrick Walker bought the assets to become the owner of Walker Racing.
|1990||PPG Indy Car World Series|
|Teo Fabi||4||Porsche North America|
|March 90P||Porsche||Foster’s Quaker State|