PORSCHE RACING HISTORYNeil Shelton (USA)
1981 : Portland 100 Miles - 2nd in class
2 August 1981 - Portland 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 28 | Porsche 911 Carrera RSR | 911 460 0059 | GTO | Neil Shelton (USA) | Neil Shelton | 9th | 2nd | 15th | 49 laps |