PORSCHE RACING HISTORYKlaus Bytzek (CDN)
1977 : Mosport 6 Hours - 3rd in class
6 February 1977 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 911 Carrera RSR | GTO | Klaus Bytzek (CDN)/Harry Bytzek (CDN)/Rudy Bartling (CDN) | Bytzek Automotive Design (CDN) | 27th | 16th | 26th | 343 laps - DNF |
19 March 1977 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 911 Carrera RSR | GTO | Rudy Bartling (CDN)/Klaus Bytzek (CDN) | Bytzek Automotive (CDN) | 6th | 6th | 19th | 217 laps |
20 August 1977 - Mosport 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 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 |
9 November 1977 - Trans-Am Mont-Tremblant - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 911 Carrera RSR | TA-II | Klaus Bytzek (CDN) | Bytzek Automotive Design (CDN) | 8th | 4th | 11th | 36 laps |