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 | GTU | Porsche 911 | J. Dana Roehrig | |
| 2 | Sebring Sebring 12 godzin | 1978.03.18 | GTU | Porsche 911 |  Bill Scott Racing | |
| 3 | Talladega | 1978.04.02 | GTU | Porsche 911 | Quality Inn | |
| 4 | Road Atlanta | 1978.04.16 | GTU | Porsche 911S | Roehrig Racing | |
| 5 | Laguna Seca | 1978.04.30 | GTU | Datsun Z | | |
| 6 | Hallett | 1978.05.07 | GTU | Porsche 911S | | |
| 7 | Lime Rock Park | 1978.05.29 | GTU | Datsun Z | Bob Sharp Racing | |
| 8 | Brainerd | 1978.06.18 | GTU | Porsche 911S | | |
| 9 | Daytona | 1978.07.04 | GTU | Porsche 911S | | |
| 10 | Sears Point | 1978.07.30 | GTU | Datsun Z | | |
| 11 | Portland | 1978.08.06 | GTU | Porsche 911 | | |
| 12 | Mid-Ohio | 1978.08.27 | GTU | Porsche 911 | | |
| 13 | Road Atlanta | 1978.09.04 | GTU | Datsun Z | Sun/Moon Electramotive | |
| 14 | Daytona | 1978.11.26 | GTU | Datsun Z | |
