PORSCHE RACING HISTORYBill Adam (CDN)
1990
4 February 1990 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 962 GTi | 962GTi-DR1 | GTP | Bill Adam (CDN)/Richard Laporte (CDN)/Scott Goodyear (CDN)/David Seabroke (CDN) | DSR Motorsports | 54th | 14th | 12th | 43 laps - Engine |
17 March 1990 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 962 GTi | 962GTi-DR1 | GTP | Bill Adam (CDN)/Scott Harrington (USA)/David Seabroke (CDN) | DSR Motorsports | 45th | 14th | 13th | 39 laps - Accident |