PORSCHE RACING HISTORYDale Whittington (USA)
1983 : Sebring 12 Hours - 2nd overall, 1st in class
6 February 1983 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 47 | Porsche 935 M16 | 930 990 0032 | GTP | Frank Rubino (USA)/Pepe Romero (USA)/Doc Bundy (USA)/Dale Whittington (USA) | Frank Rubino (USA) | 11th | 6th | 3rd | 546 laps |
27 February 1983 - Miami GP - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 935 K3/80 | 000 00013 | GTP | Dale Whittington (USA) | Bob Akin Motor Racing (USA) | 14th | 14th | 15th | 26 laps |
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 935 K3/80 | 000 00013 | GTP | Bob Akin (USA)/Dale Whittington (USA)/John O'Steen (USA) | Bob Akin Motor Racing (USA) | 2nd | 1st | 6th | 231 laps |
10 April 1983 - Road Atlanta 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 935 K3/80 | 000 00013 | GTP | Bob Akin (USA)/Dale Whittington (USA) | Bob Akin Motor Racing (USA) | 43rd | 12th | 4th | 65 laps - DNF |
24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 935 K3/80 | 000 00013 | GTP | Bob Akin (USA)/Dale Whittington (USA) | Bob Akin Motor Racing (USA) | 7th | 5th | 16th | 176 laps |