PORSCHE RACING HISTORYDieter Schornstein (D)
1983
4 September 1983 - Spa 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 936 C | JR-005 | C | Dieter Schornstein (D)/"John Winter" Louis Krages (D)/Jean-Michel Martin (B) | Joest Racing | 8th | 8th | 20th | 127 laps |
10 December 1983 - Kyalami 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 956 | 956-105 | C | Dieter Schornstein (D)/"John Winter" Louis Krages (D)/Bob Wollek (F) | Joest Racing | 4th | 4th | 9th | 228 laps |