PORSCHE RACING HISTORYPorsche 935 K3 - Chassis No. 930 990 0028
3 February 1980 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 94 | Porsche 935/79 | 930 990 0028 | GTX | Dale Whittington (USA)/Axel Plankenhorn (D) | Whittington Bros. (USA) | 51st | 18th | 5th | 179 laps - Engine |
27 April 1980 - Riverside 5 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 94 | Porsche 935/79 | 930 990 0028 | GTX | Dale Whittington (USA)/Michael Chandler (USA) | Whittington Brothers Racing (USA) | 4th | 4th | 13th | 160 laps |
30 November 1980 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 94 | Porsche 935 K3 | 930 990 0028 | GTX | Bill Whittington (USA) | Whittington Brothers Racing (USA) | 67th | 16th | 3rd | 0 laps - DNF |