PORSCHE RACING HISTORYWorld Championship for Makes
1978 - every round was won by Porsche 935s, from Daytona to Vallelunga.
1972
6 February 1972 - Daytona 6 Hours
25 April 1972 - Monza 1000 km
28 May 1972 - Nürburgring 1000 km
11 June 1972 - Le Mans 24 Hours
1973
4 February 1973 - Daytona 24 Hours
25 March 1973 - Vallelunga 6 Hours
15 April 1973 - Dijon 1000 km
25 April 1973 - Monza 1000 km
6 May 1973 - Spa 1000 km
13 May 1973 - Targa Florio
27 May 1973 - Nürburgring 1000 km
10 June 1973 - Le Mans 24 Hours
24 June 1973 - Zeltweg 1000 km
21 July 1973 - Watkins Glen 6 Hours
1974
16 June 1974 - Le Mans 24 Hours
13 July 1974 - Watkins Glen 6 Hours
1975
2 February 1975 - Daytona 24 Hours
23 March 1975 - Mugello 1000 Km
6 April 1975 - Dijon 800 Km
20 April 1975 - Monza 1000 Km
4 May 1975 - Spa 1000 Km
18 May 1975 - Coppa Florio
1 June 1975 - Nürburgring 1000 Km
29 June 1975 - Zeltweg 1000 km
1976
21 March 1976 - Mugello 6 Hours
4 April 1976 - Vallelunga 6 Hours
9 May 1976 - Silverstone 6 Hours
30 May 1976 - Nürburgring 1000 km
26 June 1976 - Zeltweg 6 Hours
10 July 1976 - Watkins Glen 6 Hours
4 September 1976 - Dijon 6 Hours
1977
6 February 1977 - Daytona 24 Hours
20 March 1977 - Mugello 6 Hours
9 July 1977 - Watkins Glen 6 Hours
20 August 1977 - Mosport 6 Hours
1978
5 February 1978 - Daytona 24 Hours
19 March 1978 - Mugello 6 Hours
22 April 1978 - Dijon 6 Hours
14 May 1978 - Silverstone 6 Hours
28 May 1978 - Nürburgring 1000 km
25 June 1978 - Misano 6 Hours
8 July 1978 - Watkins Glen 6 Hours
3 September 1978 - Vallelunga 6 Hours
1979
4 February 1979 - Daytona 24 Hours
18 March 1979 - Mugello 6 Hours
22 April 1979 - Dijon 6 Hours
6 May 1979 - Silverstone 6 Hours
3 June 1979 - Nürburgring 1000 km
7 July 1979 - Watkins Glen 6 Hours
5 August 1979 - Brands Hatch 6 Hours
1980
3 February 1980 - Daytona 24 Hours
16 March 1980 - Brands Hatch 6 Hours
11 May 1980 - Silverstone 6 Hours
25 May 1980 - Nürburgring 1000 km
15 June 1980 - Le Mans 24 Hours
5 July 1980 - Watkins Glen 6 Hours
17 August 1980 - Mosport 6 Hours
7 September 1980 - Vallelunga 6 Hours
28 September 1980 - Dijon 1000 Kilometres