PORSCHE RACING HISTORYHans Heyer (D)
1978 : Mugello 6 Hours - 1st overall : Dijon 6 Hours - 2nd overall : Nürburgring 1000 km - 1st overall : Vallelunga 6 Hours - 2nd overall
19 March 1978 - Mugello 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 935/77A | 930 890 0015 | Gr.5 | Toine Hezemans (NL)/Hans Heyer (D)/John Fitzpatrick (GB) | Gelo Racing Team (D) | 1st | 1st | 2nd | 176 laps |
22 April 1978 - Dijon 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 935/77A | 930 890 0011 | Gr.5 | Toine Hezemans (NL)/Hans Heyer (D)/John Fitzpatrick (GB) | Gelo Racing Team (D) | 2nd | 2nd | 3rd | 166 laps |
14 May 1978 - Silverstone 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 935/77A | 930 890 0011 | Gr.5 | Toine Hezemans (NL)/Hans Heyer (D)/John Fitzpatrick (GB) | Gelo Racing Team (D) | 16th | 10th | 5th | 178 laps - Oil Leak |
14 May 1978 - Silverstone 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 4 | Porsche 935/77A | 930 890 0020 | Gr.5 | Klaus Ludwig (D)/Hans Heyer (D)/Derek Bell (GB) | Gelo Racing Team (D) | DNF | 4th | 111 laps - Seized Wheel Stud |
28 May 1978 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 3 | Porsche 935/77A | 930 890 0020 | Gr.5+2.0 | Klaus Ludwig (D)/Hans Heyer (D)/Toine Hezemans (NL) | Weisberg-Gelo-Team (D) | 1st | 1st | 5th | 44 laps |
28 May 1978 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 935/77A | 930 890 0011 | Gr.5+2.0 | John Fitzpatrick (GB)/Hans Heyer (D)/Toine Hezemans (NL) | Weisberg-Gelo-Team (D) | DNF | 4th | 7 laps - DNF |
25 June 1978 - Misano 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935/77A | 930 890 0011 | Gr.5 | John Fitzpatrick (GB)/Hans Heyer (D) | Gelo Racing Team (D) | DNF | 3rd | 58 laps - Out of Fuel |
3 September 1978 - Vallelunga 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 8 | Porsche 935/77A | 930 890 0011 | Gr.5 | Toine Hezemans (NL)/Hans Heyer (D)/John Fitzpatrick (GB) | Gelo Racing Team (D) | 2nd | 2nd | 3rd | 267 laps |