PORSCHE RACING HISTORYRobert Kirby (USA)
1976 : Daytona 24 Hours - 3rd in class
1 February 1976 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 914/6 | GTU | John Hotchkis (USA)/Robert Kirby (USA)/Len Jones (USA) | Max Dial (USA) | 13th | 3rd | 42nd | 467 laps |
20 March 1976 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 914/6 | GTU | Robert Kirby (USA)/John Hotchkis (USA)/Len Jones (USA) | Max Dial Porsche-Audi (USA) | 14th | 4th | 51st | 198 laps |
2 May 1976 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 914/6 | GTU | Robert Kirby (USA) | Max Dial Porsche/Audi (USA) | 23rd | 7th | 38th | 46 laps |
3 October 1976 - Laguna Seca 100 Miles II - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 911 Carrera RSR | 911 360 0601 | GTO | Robert Kirby (USA) | Giant Kirby Racing | 30th | 23rd | 26th | 36 laps - DNF |