PORSCHE RACING HISTORYTerry Herman (USA)
1983
24 July 1983 - Sears Point 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 69 | Porsche 911 Carrera | GTO | Terry Herman (USA)/Don Madsen (USA) | Davin Motorsports | 21st | 5th | 21st | 65 laps |
31 July 1983 - Portland 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 69 | Porsche 911 Carrera | GTO | Terry Herman (USA) | Davin Motorsports | 30th | 10th | 19th | 61 laps - DNF |