PORSCHE RACING HISTORYBob Harmon (USA)
1979
10 June 1979 - Le Mans 24 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 73 | Porsche 935 | 930 770 0959 | IMSA+2.5 | Robert Kirby (USA)/Bob Harmon (USA)/John Hotchkis (USA) | Dick Barbour - Wynn's International (USA) | 9th | 4th | 39th | 276 laps |
29 July 1979 - Sears Point 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 66 | Porsche 935 | 930 770 0959 | GTX | Bob Harmon (USA) | Stanton/Barbour (USA) | 28th | 16th | 30th | 9 laps - DNF |