PORSCHE RACING HISTORYMichael Keyser (USA)
1976 : Sebring 12 Hours - 1st overall
1 February 1976 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 911 Carrera RSR | 911 460 9048 | GTO | George Dyer (USA)/Michael Keyser (USA) | Heufeld Porsche (USA) | 71st | 37th | 7th | 5 laps - Engine |
20 March 1976 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 911 Carrera RSR | 911 460 9056 | GTO | Al Holbert (USA)/Michael Keyser (USA) | G. W. Dickinson/Holbert Porsche-Audi (USA) | 1st | 1st | 3rd | 230 laps |