PORSCHE RACING HISTORY1980 - H. P.-Joisten-Trophy Zolder
12 October 1980 - Zolder, Belgium
Dieter Schornstein wins in a Porsche 935/77A
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 4 | Porsche 935/77A | 930 890 0012 | Gr.5 | Dieter Schornstein (D) | Vegla Racingteam Aachen (D) | 1st | |||
| 3 | Porsche 935 K3 | 009 0003 | Gr.5 | Gerhard Holup (D) | Weralit Elora Racing Team (D) | 9th | |||
| 29 | Porsche 935 K3 | 009 0002 | Gr.5 | Claude Bourgoignie (B) | Claude Bourgoignie (B) | DNF |
IMSA - International Motor Sport Association
Previous 1980 - Interserie Kassel-Calden Next 1980 - Daytona Finale 250 Miles