PORSCHE RACING HISTORY1978 - Trans-Am Portland
11 June 1978 - Portland International Raceway, USA
Ludwig Heimrath, Sr second in a Porsche 935, 1 lap behind the winning Chevrolet Monza driven by Tuck Thomas
Overall - 2nd, 3rd : TA-II - 2nd, 3rd
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 2nd | 2nd | 5th | 49 laps |
| 47 | Porsche 911 Carrera RSR | 911 460 0059 | TA-II | Bill Hanel (USA) | Hanel Racing | 3rd | 3rd | 12th | 48 laps |
| 85 | Porsche 934/5 | 930 770 0952 | TA-II | Bruce Leven (USA) | Bayside Disposal Racing (USA) | 4th | 4th | 14th | 48 laps |
| 24 | Porsche 911 Carrera RSR | 911 460 9056 | TA-II | Tom Frank (USA) | Executive Industries (USA) | 9th | 5th | 22nd | 47 laps |
| 51 | Porsche 914/6 | TA-I | Scott Taylor (USA) | 17th | 11th | 39th | 42 laps | ||
| 57 | Porsche 935 | 930 770 0951 | TA-II | Monte Shelton (USA) | Monte's Motors (USA) | 19th | 7th | 3rd | 39 laps - Turbocharger |
| 59 | Porsche 911 | TA-I | Nick Feodorhoff (USA) | Performance Unlimited (USA) | 27th | 18th | 38th | 19 laps - Accident | |
| 23 | Porsche 914/6 | 473 29 24107 | TA-I | Bob Zulkowski (USA) | Metal Craft Racing (USA) | 32nd | 21st | 32nd | 5 laps - Engine |
| 02 | Porsche 914/6 | 914 143 0332 | TA-I | Bruce Sanders (USA) | Bruce Sanders | 33rd | 22nd | 34th | 3 laps - Brakes |
Trans-Am
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