PORSCHE RACING HISTORYTim Selby (USA)
1983 : Mosport 6 Hours - 3rd in class
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 911 Carrera RSR | 911 230 0030 | GTU | Tim Selby (USA)/Earl Roe (USA) | Roe/Selby Racing | 15th | 4th | 69th | 210 laps |
19 June 1983 - Mid-Ohio 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 914/6 | 914 043 0538 | GTU | Tim Selby (USA)/Earl Roe (USA) | Roe/Selby Racing (USA) | 16th | 7th | 37th | 185 laps |
14 August 1983 - Mosport 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 914/6 | 914 043 0538 | GTU | Tim Selby (USA)/Earl Roe (USA) | Roe/Selby Racing (USA) | 8th | 3rd | 23rd | 200 laps |
21 August 1983 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 914/6 | 914 043 0538 | GTU | Tim Selby (USA)/Earl Roe (USA) | Roe/Selby Racing (USA) | 14th | 5th | 32nd | 101 laps |