PORSCHE RACING HISTORYWorld Challenge for Endurance Drivers
1978
18 March 1978 - Sebring 12 Hours
2 April 1978 - Talladega 6 Hours
11 June 1978 - Le Mans 24 Hours
1979
17 March 1979 - Sebring 12 Hours
3 June 1979 - Nürburgring 1000 km
10 June 1979 - Le Mans 24 Hours
1980
22 March 1980 - Sebring 12 Hours
27 April 1980 - Riverside 5 Hours