PORSCHE RACING HISTORYJack Swanson (USA)
1981
1 February 1981 - Daytona 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 52 | Porsche 911 | GTU | Tom Cripe (USA)/Dick Gauthier (USA)/Jack Swanson (USA) | Beach Ball Racing | 26th | 10th | 68th | 450 laps |
21 March 1981 - Sebring 12 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 52 | Porsche 911 | GTU | Jack Swanson (USA)/Tom Cripe (USA)/Van McDonald (USA) | Ours & Hours Racing | 33rd | 11th | 60th | 154 laps |