PORSCHE RACING HISTORYRainer Brezinka (CDN)
1978
18 March 1978 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 50 | Porsche 911 S | GTU | Fritz Hochreuter (CDN)/Rudy Bartling (CDN)/Rainer Brezinka (CDN) | Fritz Hochreuter (CDN) | 16th | 6th | 43rd | 189 laps |
4 July 1978 - Daytona 250 Miles Paul Revere - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 50 | Porsche 911 S | GTU | Fritz Hochreuter (CDN)/Rainer Brezinka (CDN) | 24th | 10th | 47th | 57 laps |
26 November 1978 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 50 | Porsche 911 S | GTO | Fritz Hochreuter (CDN)/Rainer Brezinka (CDN) | Fritz Hochreuter (CDN) | 22nd | 11th | 41st | 56 laps |