PORSCHE RACING HISTORYBob Copeman (USA)
1983
24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 49 | Porsche 911 Carrera RSR | 12803002 | GTO | Bob Copeman (USA)/Jerry Jolly (USA) | Copeman Racing (USA) | 26th | 9th | 49th | 132 laps |
1 May 1983 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 49 | Porsche 911 Carrera RSR | 12803002 | GTO | Bob Copeman (USA) | Copeman Racing (USA) | 22nd | 13th | 18th | 9 laps - DNF |