PORSCHE RACING HISTORYRon Grable (USA)
1983
6 February 1983 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 36 | Porsche 924 Carrera GTR | GTO | Paul Miller (USA)/Jim Busby (USA)/Ron Grable (USA) | Herman & Miller P & A (USA) | 61st | 31st | 30th | 91 laps - Engine |
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 36 | Porsche 924 Carrera GTR | GTO | Paul Miller (USA)/Jim Busby (USA)/Ron Grable (USA) | Herman & Miller P & A (USA) | 50th | 24th | 30th | 132 laps - Engine |
24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 36 | Porsche 924 Carrera GTR | GTU | Jim Busby (USA)/Ron Grable (USA) | Herman Miller Porsche Audi (USA) | 24th | 8th | 41st | 136 laps |
19 June 1983 - Mid-Ohio 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 36 | Porsche 924 Carrera GTR | GTU | Jim Busby (USA)/Ron Grable (USA) | Herman Miller Porsche Audi (USA) | 34th | 17th | 36th | 122 laps - DNF |