PORSCHE RACING HISTORYHans Heyer (D)
1983 : Monza 1000 km - 3rd overall
10 April 1983 - Monza 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 956 | 956-105 | C | Rolf Stommelen (D)/Clemens Schickentanz (D)/Hans Heyer (D) | Joest Racing | 3rd | 3rd | 7th | 170 laps |
8 May 1983 - Silverstone 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 956 | 956-105 | C | Hans Heyer (D)/Clemens Schickentanz (D)/Volkert Merl (D) | Joest Racing | DNF | 7th | 74 laps - Engine |
29 May 1983 - Nürburgring 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 18 | Porsche 956 | 956-109 | C | Jürgen Lässig (D)/Axel Plankenhorn (D)/Hans Heyer (D) | Obermaier Racing (D) | 4th | 4th | 8th | 42 laps |
4 September 1983 - Spa 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 956 | 956-105 | C | Hans Heyer (D)/Volkert Merl (D)/Bob Wollek (F) | Joest Racing | DNF | 12th | 90 laps - Suspension |
2 October 1983 - Fuji 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 956 | 956-105 | C | Bob Wollek (F)/Hans Heyer (D)/Volkert Merl (D) | Joest Racing | 5th | 5th | 4th | 209 laps |