PORSCHE RACING HISTORYBill Whittington (USA)
1981 : Sebring 12 Hours - 3rd overall : Daytona 250 Miles Paul Revere - 3rd in class : Mosport 6 Hours - 3rd overall
1 February 1981 - Daytona 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 94 | Porsche 935 K3 | 930 670 0152 | GTX | Don Whittington (USA)/Bill Whittington (USA)/Dale Whittington (USA) | Whittington Brothers Racing (USA) | 57th | 19th | 9th | 84 laps - Engine |
21 March 1981 - Sebring 12 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 935 K3 | 930 770 0960 | GTX | Marty Hinze (USA)/Milt Minter (USA)/Bill Whittington (USA) | Marty Hinze Racing (USA) | 3rd | 3rd | 12th | 240 laps |
21 March 1981 - Sebring 12 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 94 | Porsche 935 K3 | 930 670 0152 | GTX | Don Whittington (USA)/Bill Whittington (USA)/Dale Whittington (USA) | Whittington Bros (USA) | 65th | 22nd | 9th | 43 laps - Engine |
14 June 1981 - Le Mans 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935 K3 | 01 00020 | Gr.5 | Ted Field (USA)/Bill Whittington (USA)/Don Whittington (USA) | Porsche Kremer Racing (D) | DNF | 6th | 57 laps - Engine |
4 July 1981 - Daytona 250 Miles Paul Revere - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 0 | Porsche 935 K3/80 | 000 00010 | GTX | Ted Field (USA)/Bill Whittington (USA) | Interscope Racing (USA) | 7th | 3rd | 3rd | 57 laps |
4 July 1981 - Daytona 250 Miles Paul Revere - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 00 | Porsche 935 K3/80 | 000 00027 | GTX | Bill Whittington (USA) | Interscope Racing (USA) | 33rd | 10th | 11th | 8 laps - Turbo |
12 July 1981 - Watkins Glen 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 0 | Porsche 935 K3/80 | 000 00010 | Gr.5 | Ted Field (USA)/Bill Whittington (USA) | Interscope IMSA Racing, Inc. (USA) | DNF | 1st | 95 laps - Engine |
16 August 1981 - Mosport 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 0 | Porsche 935 K3/80 | 000 00010 | GTX | Ted Field (USA)/Bill Whittington (USA) | Interscope IMSA Racing (USA) | 3rd | 3rd | 2nd | 222 laps |
23 August 1981 - Road America 500 Miles - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 0 | Porsche 935 K3/80 | 000 00010 | GTX | Ted Field (USA)/Bill Whittington (USA) | Interscope Racing (USA) | 7th | 7th | 8th | 111 laps |