PORSCHE RACING HISTORYMarty Hinze (USA)
1981 : Sebring 12 Hours - 3rd overall
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 |
26 April 1981 - Riverside 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 08 | Porsche 935 K3 | 000 0009 | GTX | Preston Henn (USA)/Marty Hinze (USA)/Gary Belcher (USA) | Preston Henn (USA) | 45th | 16th | 40th | 33 laps - DNF |
26 April 1981 - Riverside 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 09 | Porsche 935 K3 | 930 890 0021 | GTX | Gary Belcher (USA)/Preston Henn (USA)/Marty Hinze (USA) | Preston Henn (USA) | 58th | 20th | 15th | 5 laps - DNF |
12 July 1981 - Watkins Glen 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 22 | Porsche 935 K3 | 930 770 0960 | Gr.5 | Marty Hinze (USA)/Dale Whittington (USA)/Preston Henn (USA) | Marty Hinze Racing (USA) | 5th | 5th | 15th | 157 laps |
13 September 1981 - Road Atlanta 150 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 22 | Porsche 935 | 930 770 0960 | GTX | Marty Hinze (USA)/Joe Varde (USA) | Marty Hinze (USA) | 25th | 12th | 15th | 9 laps - DNF |
29 November 1981 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 935 | 930 770 0960 | GTX | Marty Hinze (USA) | Marty Hinze (USA) | 70th | 17th | 9th | 0 laps - DNF |