Jack Refenning (USA)
1981
21 March 1981 - Sebring 12 Hours - World Championship for Drivers and Makes
No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
24 | Porsche 934 | 930 670 0168 | GTO | Jack Refenning (USA)/Ren Tilton (USA)/Peter Welter (USA) | Jack Refenning (USA) | 37th | 15th | 24th | 139 laps - DNF |
29 November 1981 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
24 | Porsche 934 | 930 670 0168 | GTO | Jack Refenning (USA)/Ren Tilton (USA) | 42nd | 20th | 24th | 43 laps |