PORSCHE RACING HISTORYRobert Frostrom (USA)
1977
9 July 1977 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 911 Carrera RSR | 911 560 9122 | Gr.5 | Robert Frostrom (USA)/Monte Shelton (USA) | Monte's Motors (USA) | 7th | 7th | 22nd | 162 laps |
31 July 1977 - Trans-Am Hallett - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 54 | Porsche 911 Carrera RSR | 911 560 9122 | TA-II | Robert Frostrom (USA)/John Wood (USA) | Robert Frostrom (USA) | 15th | 8th | 14th | 46 laps |
3 September 1977 - Trans-Am Road America - Race I - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 54 | Porsche 911 Carrera RSR | 911 560 9122 | TA-II | Robert Frostrom (USA) | Robert Frostrom Racing (USA) | 46th | 13th | 28th | 6 laps - Engine |