PORSCHE RACING HISTORY935 K3
1983
27 February 1983 - Miami GP - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 000 0009 | GTP | Don Whittington (USA) | Henn's Swap Shop Racing (USA) | 6th | 6th | 19th | 27 laps |
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 94 | Porsche 935 K3 | 000 0009 | GTP | Don Whittington (USA)/Bill Whittington (USA) | Henn's Swap Shop Racing (USA) | 12th | 5th | 9th | 218 laps |
4 April 1983 - Thundersports Brands Hatch - Thundersports
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 935 K | 930 890 0022 | Gr.5 | Barry Robinson (GB)/Dudley Wood (GB) | Robinson Demolition/Wildwood Racing (GB) | 6th | 1st | 17th | 52 laps |
24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 935 K3 | 000 0009 | GTP | Michael Andretti (USA)/A. J. Foyt (USA)/Mario Andretti (USA)/Preston Henn (USA) | PPG Industries (USA) | 20th | 7th | 9th | 154 laps - DNF |
14 August 1983 - Mosport 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 935 K3 | 000 0009 | GTP | John Graham (CDN)/Hurley Haywood (USA)/Eddie Wachs (USA) | Henn's T-Bird Swap Shop (USA) | 10th | 5th | 10th | 196 laps - DNF |
27 November 1983 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTP | Wayne Baker (USA)/Tom Blackaller (USA)/Jim Mullen (USA) | Wayne Baker Racing (USA) | 30th | 13th | 6th | 75 laps |
| 23 | Porsche 935 K3 | 930 770 0960 | GTP | Randy Lanier (USA)/Joe Varde (USA) | 43rd | 14th | 17th | 65 laps |