PORSCHE RACING HISTORYJean-Marc Guignard (CH)
1973
1 April 1973 - Nürburgring 300 Km - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 148 | Porsche 911 S | GT2.0 | Jean-Marc Guignard (CH) | Porsche Club Romand (CH) | 12th | 5th | 14 laps |
2 September 1973 - Monza 6 Hours - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 38 | Porsche 911 S | GT3.0 | Jean-Marc Guignard (CH)/Gérard Pillon (CH) | 9th | 7th | 21st | -25 laps |