PORSCHE RACING HISTORY1983 - Trans-Am Moroso
1 May 1983 - Moroso Motorsports Park
Ludwig Heimrath, Sr 6th in a Porsche 935
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 6th | 21st | 44 laps | ||
| 70 | Porsche 911 SC | Van McDonald (USA) | Van McDonald | 14th | 30th | 42 laps | |||
| 36 | Porsche 924 Carrera GTR | Paul Miller (USA) | Herman+Miller Porsche-Audi | 16th | 8th | 41 laps | |||
| 90 | Porsche 911 SC | 911 030 1263 | Mike Schaefer (USA) | 901 Shop (USA) | 18th | 36th | 40 laps |
Trans-Am
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