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 | GTU | Porsche 911S |  Roehrig Racing | |
| 5 | Road Atlanta | 1978.04.16 | GTX | Porsche 935 Turbo | Brumos Porsche Audi | |
| 6 | Laguna Seca | 1978.04.30 | GTX | Porsche 935 Turbo | Vasek Polak | |
| 7 | Laguna Seca | 1978.04.30 | GTU | Datsun Z | | |
| 8 | Hallett | 1978.05.07 | GTU | Porsche 911S | | |
| 9 | Hallett | 1978.05.07 | GTX | BMW 320i | McLaren North America | |
| 10 | Lime Rock Park | 1978.05.29 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 11 | Lime Rock Park | 1978.05.29 | GTU | Datsun Z | Bob Sharp Racing | |
| 12 | Brainerd | 1978.06.18 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 13 | Daytona | 1978.07.04 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 14 | Sears Point | 1978.07.30 | GTX | BMW 320i | McLaren North America | |
| 15 | Sears Point | 1978.07.30 | GTU | Datsun Z | | |
| 16 | Portland | 1978.08.06 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 17 | Portland | 1978.08.06 | GTU | Porsche 911 | | |
| 18 | Mid-Ohio | 1978.08.27 | GTX | Porsche 935 Turbo | Whittington Brothers Racing | |
| 19 | Road Atlanta | 1978.09.04 | GTU | Datsun Z | Sun/Moon Electramotive | |
| 20 | Road Atlanta | 1978.09.04 | GTX | Porsche 935 Turbo | Brumos Porsche | |
| 21 | Daytona | 1978.11.26 | GTX | Porsche 935 Turbo | Brumos Porsche |
