PORSCHE RACING HISTORY1987 - Columbus IMSA GT
4 October 1987 - Columbus, Ohio Street Circuit, USA
Chester Vincentz 12th in a Porsche 934
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 91 | Porsche 934 | 009 00030 | GTO | Chester Vincentz (USA) | Electrodyne Performance | 12th | 12th | 12th | 25 laps |
| 56 | Porsche 911 Carrera | GTU | Karl Durkheimer (USA) | Escort Racing (USA) | 18th | 4th | 25th | 25 laps | |
| 21 | Porsche 911 Carrera | GTO | Mike Bavaro (USA) | Bodymotion Racing | 29th | 15th | 33rd | 22 laps | |
| 20 | Porsche 914/6 | GTU | Mark Altman (USA) | Altman Bros. Racing (USA) | 40th | 17th | 34th | 0 laps - DNF |
IMSA - International Motor Sport Association
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