PORSCHE RACING HISTORYDoug Lutz (USA)
1983
6 February 1983 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 911 Carrera RSR | 911 460 0037 | GTO | Doug Lutz (USA)/Dave Panaccione (USA)/Larry Connor (USA)/Fern Prego (USA) | D & L Performance (USA) | 59th | 29th | 59th | 113 laps - Flywheel |
27 February 1983 - GP Miami IMSA GTO - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 911 Carrera RSR | 911 460 0037 | GTO | Doug Lutz (USA) | DL Performance Eng. (USA) | 7th | 7th | 17th | 33 laps |
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 911 Carrera RSR | 911 460 0037 | GTO | Doug Lutz (USA)/Mike Brummer (USA)/Larry Connor (USA) | DL Performance Engineering (USA) | 49th | 23rd | 84th | 139 laps |