PORSCHE RACING HISTORYLudwig Heimrath, Sr (CDN)
1976 : Watkins Glen 6 Hours - 3rd in class
1 February 1976 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 74 | Porsche 911 Carrera RSR | 911 560 9123 | GTO | Ludwig Heimrath, Sr (CDN)/Jacques Bienvenue (CDN)/Norm Ridgely (CDN) | Ludwig Heimrath (CDN) | 46th | 22nd | 20th | 189 laps - Engine |
10 July 1976 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 74 | Porsche 911 Carrera RSR | 911 560 9123 | TA-II | Ludwig Heimrath, Sr (CDN)/Jacques Bienvenue (CDN) | Heimrath Racing (CDN) | 7th | 3rd | 12th | 163 laps - Accident |