PORSCHE RACING HISTORYDennis Aase (USA)
1980 : Road America 500 Miles - 2nd in class : Road Atlanta 50 Miles - Heat 1 - 3rd in class : Road Atlanta 50 Miles - Heat 2 - 3rd in class
27 April 1980 - Riverside 5 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 64 | Porsche 911 | GTU | Dennis Aase (USA)/Alan Johnson (2) (USA) | Alan Johnson Racing (USA) | 56th | 20th | 25th | 20 laps - Blown Cylinder |
31 August 1980 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 64 | Porsche 911 | GTO | Dennis Aase (USA)/Bob Bergstrom (USA) | Alan Johnson Racing (USA) | 9th | 2nd | 15th | 113 laps |
21 September 1980 - Road Atlanta 50 Miles - Heat 1 - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 64 | Porsche 911 Carrera RSR | GTO | Dennis Aase (USA) | Alan Johnson Racing (USA) | 13th | 3rd | 19th | 19 laps |
21 September 1980 - Road Atlanta 50 Miles - Heat 2 - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 64 | Porsche 911 Carrera RSR | GTO | Dennis Aase (USA) | Alan Johnson Racing (USA) | 9th | 3rd | 19th | 12 laps |