PORSCHE RACING HISTORYPorsche 911 - Chassis No. 911 410 3631
2 August 1981 - Portland 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 17 | Porsche 911 Carrera RSR | 911 410 3631 | GTO | Karl Durkheimer (USA) | Karl Durkheimer (USA) | 17th | 10th | 24th | 45 laps |
1 August 1982 - Portland 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 26 | Porsche 911 Carrera RSR | 911 410 3631 | GTO | Karl Durkheimer (USA) | Karl Durkheimer (USA) | 9th | 5th | 17th | 47 laps |
29 July 1984 - Portland 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 911 Carrera RSR | 911 410 3631 | GTO | Karl Durkheimer (USA)/Neil Shelton (USA) | 26th | 9th | 25th | 74 laps - Piston |
28 April 1985 - Riverside 600 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 54 | Porsche 911 | 911 410 3631 | GTU | Danny Edwards (USA) | 52nd | 18th | 50th | 22 laps - DNF |
17 March 1990 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 50 | Porsche 911 | 911 410 3631 | GTU | Rudy Bartling (CDN)/Werner Frank (USA)/Fritz Hochreuter (CDN) | Rudy Bartling (CDN) | 44th | 12th | 43rd | 45 laps - Engine |