Dave Cowart (GTO)
Dave White (GTU)
Mistrz producentów
Porsche (GTX)
Porsche (GTO)
Porsche (GTU)
| Runda | Tor | Data | Klasa | Kierowca | Pojazd | Zespół |
|---|---|---|---|---|---|---|
| 1 | Daytona Daytona 24 godziny | 1978.02.04 - 02.05 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 2 | Sebring Sebring 12 godzin | 1978.03.18 | GTX | Porsche 935 | Dick Barbour Performance | |
| 3 | Talladega | 1978.04.02 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 4 | Road Atlanta | 1978.04.16 | GTX | Porsche 935 Turbo | Brumos Porsche Audi | |
| 5 | Laguna Seca | 1978.04.30 | GTX | Porsche 935 Turbo | Vasek Polak | |
| 6 | Hallett | 1978.05.07 | GTX | BMW 320i | McLaren North America | |
| 7 | Lime Rock Park | 1978.05.29 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 8 | Brainerd | 1978.06.18 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 9 | Daytona | 1978.07.04 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 10 | Sears Point | 1978.07.30 | GTX | BMW 320i | McLaren North America | |
| 11 | Portland | 1978.08.06 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 12 | Mid-Ohio | 1978.08.27 | GTX | Porsche 935 Turbo |  Whittington Brothers Racing | |
| 13 | Road Atlanta | 1978.09.04 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 14 | Daytona | 1978.11.26 | GTX | Porsche 935 Turbo | Brumos Porsche |
