| 1989 Portland 300 Kilometres |
1st |
Jan Lammers |
- |
| 1990 Road Atlanta 500 Kilometres |
1st |
Price Cobb |
- |
| 1989 300 km Sears Point |
1st |
Jan Lammers |
- |
| 1991 2 h West Palm Beach |
2nd |
Davy Jones |
+0.1 |
| 1989 Lime Rock 150 Laps |
2nd |
Jan Lammers |
+1.6 |
| 1990 Miami Grand Prix |
2nd |
Price Cobb |
+0.5 |
| 1991 2 h Miami |
2nd |
Davy Jones |
+0.4 |
| 1991 300 km Road Atlanta |
2nd |
Raul Boesel |
+1.1 |
| 1989 Road America 500 Kilometres |
2nd |
Jan Lammers |
+0.2 |
| 1989 Watkins Glen 500 Kilometres |
2nd |
Jan Lammers |
+0.5 |
| 1989 Topeka 300 Kilometres |
2nd |
Jan Lammers |
+1.0 |
| 1989 Mid-Ohio 500 Kilometres |
2nd |
Jan Lammers |
+0.1 |
| 1990 3 h West Palm Beach |
2nd |
Davy Jones |
+0.5 |
| 1989 360 km Tampa |
2nd |
Jan Lammers |
+0.2 |
| 1991 2 h Miami |
3rd |
Raul Boesel |
+0.5 |
| 1989 2 h San Antonio |
3rd |
Davy Jones |
+1.9 |
| 1989 Del Mar 2 Hours |
4th |
Price Cobb |
+0.7 |
| 1990 Mid-Ohio 500 Kilometres |
4th |
Price Cobb |
+1.0 |
| 1990 Lime Rock 150 Laps |
4th |
Price Cobb |
+0.9 |
| 1990 Mid-Ohio 500 Kilometres |
5th |
John Nielsen |
+1.3 |