PORSCHE RACING HISTORYNorm Ridgely (CDN)
1977
9 July 1977 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 75 | Porsche 911 Carrera RSR | Gr.5 | Norm Ridgely (CDN)/Jim Cook (USA) | Ridgely Racing (CDN) | 40th | 20th | 48 laps - Off Course |
20 August 1977 - Mosport 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 75 | Porsche 911 Carrera RSR | TA-II | Norm Ridgely (CDN)/Jim Cook (USA) | Ridgely Racing (CDN) | 14th | 8th | 10th | 114 laps - Engine |