PORSCHE RACING HISTORYSkip Winfree (USA)
1985 : Sebring 12 Hours - 3rd in class
3 February 1985 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 94 | Porsche 911 | GTU | Skip Winfree (USA)/William Phalf (USA)/Wally Hopkins (USA) | 49th Star Racing | 25th | 4th | 76th | 477 laps |
23 March 1985 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 35 | Porsche 911 Carrera RSR | 911 460 9113 | GTU | Jack Griffin (USA)/Bobby Hefner (USA)/Skip Winfree (USA) | Team Dallas | 25th | 3rd | 73rd | 178 laps |
14 April 1985 - Road Atlanta 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 35 | Porsche 911 | GTU | Bobby Hefner (USA)/Skip Winfree (USA) | 46th | 11th | 43rd | 20 laps - DNF |