PORSCHE RACING HISTORYJim Cook (USA)
1978
18 March 1978 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 911 Carrera RSR | GTO | Michael Callas (USA)/Peter Papke (USA)/Jim Cook (USA) | Rennsport Porsche Works (USA) | 20th | 7th | 13th | 182 laps |
27 August 1978 - Mid Ohio 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 64 | Porsche 911 S | GTU | Dennis Aase (USA)/Jim Cook (USA) | 38th | 12th | 25th | 47 laps - DNF |