| Runda | Tor | Data | Kierowca | Pojazd | Zespół |
|---|---|---|---|---|---|
| 1 |  Long Beach | 1991.04.14 | Swift DB4 - Toyota |  Genoa | |
| 2 | Phoenix | 1991.04.20 | Swift DB4 - Toyota | Cameron-McGee | |
| 3 | Lime Rock Park | 1991.05.27 | Swift DB4 - Toyota | P1 Racing | |
| 4 |  Montréal | 1991.06.02 | Swift DB4 - Toyota | Genoa | |
| 5 | Watkins Glen | 1991.06.29 | Swift DB4 - Toyota | Genoa | |
| 6 | Des Moines | 1991.07.14 | Swift DB4 - Toyota | Genoa | |
| 7 | Toronto | 1991.07.21 | Swift DB4 - Toyota | BDJS | |
| 8 | Trois-Rivières | 1991.08.18 | Swift DB4 - Toyota | Pierre Phillips | |
| 9 | Vancouver | 1991.09.01 | Swift DB4 - Toyota | High Bridge Racing | |
| 10 | Mid-Ohio | 1991.09.14 | Swift DB4 - Toyota | Genoa | |
| 11 | Nazareth | 1991.10.06 | Swift DB4 - Toyota | P1 Racing | |
| 12 | Laguna Seca | 1991.10.19 | Swift DB4 - Toyota | Cameron-McGee | |
| 13 | Laguna Seca | 1991.10.20 | Swift DB4 - Toyota | Genoa |
