PORSCHE RACING HISTORY928 S
1983
29 May 1983 - Nürburgring 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 111 | Porsche 928 S | B | Helge Probst (D)/Norbert Haug (D)/Wolfgang Walter (D) | Probst & Mentel | 16th | 5th | 20th | 31 laps |
19 June 1983 - Le Mans 24 Hours - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 97 | Porsche 928 S | 840225 | B | Raymond Boutinaud (F)/Patrick Gonin (F)/Alain le Page (F) | Raymond Boutinnaud | NC | 51st | 234 laps |
4 September 1983 - Spa 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 97 | Porsche 928 S | B | Helge Probst (D)/Knuth Mentel (D)/Norbert Haug (D) | Probst & Mentel | DNF | 27th | 13 laps - Engine |