PORSCHE RACING HISTORYJack Griffin (USA)
1983
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 31 | Porsche 914/6 | 914 043 0593 | GTU | Jack Griffin (USA)/John Zouzelka (USA) | Pegasus Racing | 76th | 25th | 86th | 38 laps - Accident |
3 July 1983 - Daytona 250 Miles Paul Revere - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 35 | Porsche 911 Carrera | GTO | Jack Griffin (USA)/Paul Gilgan (USA) | 23rd | 8th | 31st | 54 laps |
14 August 1983 - Mosport 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 35 | Porsche 911 Carrera | GTO | Bobby Hefner (USA)/Jack Griffin (USA)/Wayne Baker (USA) | Pegasus III Racing (USA) | 14th | 4th | 22nd | 179 laps |
21 August 1983 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 35 | Porsche 911 Carrera | GTO | Jack Griffin (USA)/Bobby Hefner (USA) | G & H Development | 31st | 11th | 29th | 73 laps |
27 November 1983 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 35 | Porsche 911 Carrera | GTO | Jack Griffin (USA)/Chris Price (USA) | 21st | 5th | 57th | 79 laps |