PORSCHE RACING HISTORY1977 - Mosport 6 Hours
20 August 1977 - Mosport Park, Canada
Ludwig Heimrath, Sr & Paul Miller win in a Porsche 934/5
Overall - 1st : TA-II - 1st, 3rd : TA-I - 2nd
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN)/Paul Miller (USA) | Heimrath Racing (CDN) | 1st | 1st | 5th | 240 laps |
| 98 | Porsche 911 | TA-I | Tom Spalding (USA)/John Bauer (USA)/Elliott Forbes-Robinson (USA) | Tom Spalding Racing (USA) | 4th | 2nd | 17th | 227 laps | |
| 9 | Porsche 911 Carrera RSR | TA-II | Klaus Bytzek (CDN)/Rudy Bartling (CDN)/Harry Bytzek (CDN) | Bytzek Automotive Design (CDN) | 5th | 3rd | 13th | 224 laps | |
| 13 | Porsche 911 Carrera RSR | TA-II | Hal Shaw, Jr. (USA)/Howard Meister (USA) | Bankrupt Inc. Racing (USA) | 6th | 4th | 16th | 224 laps | |
| 88 | Porsche 911 Carrera RSR | TA-II | Peter Overing (CDN)/Marty Hinze (USA)/Marcel Talbot (CDN) | Dicom Corporation (CDN) | 7th | 5th | 20th | 222 laps | |
| 18 | Porsche 911 Carrera RSR | 911 460 9057 | TA-II | Eitel Maier (CDN)/Jerry Jolly (USA) | Eitel Maier (CDN) | 10th | 6th | 22nd | 200 laps |
| 57 | Porsche 911 Carrera RSR | TA-I | John Wood (USA)/Chip Mead (USA) | John Wood Racing (USA) | 12th | 5th | 18th | 187 laps - Engine | |
| 0 | Porsche 934 | 930 670 0179 | TA-II | Monte Shelton (USA)/Skeeter McKitterick (USA) | Vasek Polak Racing (USA) | 13th | 7th | 7th | 154 laps |
| 75 | Porsche 911 Carrera RSR | TA-II | Norm Ridgely (CDN)/Jim Cook (USA) | Ridgely Racing (CDN) | 14th | 8th | 10th | 114 laps - Engine | |
| 16 | Porsche 935 | 930 770 0913 | Gr.5 | George Follmer (USA)/Brett Lunger (USA) | Vasek Polak Racing (USA) | 17th | 2nd | 80 laps - Valve Rocker | |
| 61 | Porsche 935 | 930 770 0910 | Gr.5 | Jim Busby (USA)/Eppie Wietzes (CDN) | Jim Busby Racing (USA) | 18th | 6th | 45 laps - Engine | |
| 1 | Porsche 935/77 | 935-005 | Gr.5 | Jacky Ickx (B)/Manfred Schurti (FL) | Martini Racing Porsche System (D) | 21st | 1st | 34 laps - Head Gasket | |
| 59 | Porsche 934/5 | 930 770 0952 | TA-II | Peter Gregg (USA)/Bob Wollek (F) | Brumos Porsche+Audi (USA) | DSQ | 4th | Illegal Suspension |
World Championship for Makes Trans-Am
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