PORSCHE RACING HISTORY934/5
1978
4 June 1978 - Trans-Am Westwood - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 85 | Porsche 934/5 | 930 770 0952 | TA-II | Bruce Leven (USA) | Bayside Racing (USA) | 7th | 4th | 15th | 53 laps |
11 June 1978 - Trans-Am Portland - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 85 | Porsche 934/5 | 930 770 0952 | TA-II | Bruce Leven (USA) | Bayside Disposal Racing (USA) | 4th | 4th | 14th | 48 laps |
30 July 1978 - Sears Point 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 71 | Porsche 934/5 | 930 770 0954 | GTX | Bruce Canepa (USA) | 7th | 6th | 13th | 38 laps |
19 August 1978 - Trans-Am Mosport - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 85 | Porsche 934/5 | 930 770 0952 | TA-II | Bruce Leven (USA) | Bayside Disposal Racing Team (USA) | 16th | 10th | 20th | 36 laps |
8 October 1978 - Trans-Am Laguna Seca - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 85 | Porsche 934/5 | 930 770 0952 | TA-II | Bruce Leven (USA) | Bayside Disposal Racing (USA) | 6th | 6th | 11th | 49 laps |
| 21 | Porsche 934/5 | 930 770 0954 | TA-II | Bruce Canepa (USA) | Canepa Racing (USA) | DNS | 8th |
5 November 1978 - Trans-Am Mexico - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 85 | Porsche 934/5 | 930 770 0952 | TA-II | Bruce Leven (USA) | Bayside Disposal Racing (USA) | 12th | 7th | 20th | 28 laps |