PORSCHE RACING HISTORYKlaus Ludwig (D)
1978 : Nürburgring 1000 km - 1st overall : Vallelunga 6 Hours - 3rd overall
19 March 1978 - Mugello 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 11 | Porsche 935/77A | 930 890 0011 | Gr.5 | John Fitzpatrick (GB)/Klaus Ludwig (D)/Toine Hezemans (NL) | Gelo Racing Team (D) | 9th | 9th | 1st | 157 laps |
22 April 1978 - Dijon 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 935/77A | 930 890 0015 | Gr.5 | Klaus Ludwig (D)/Toine Hezemans (NL) | Gelo Racing Team (D) | DNF | 1st | 101 laps - Driveshaft |
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 |
| 1 | Porsche 935/77A | 930 890 0015 | Gr.5+2.0 | Klaus Ludwig (D)/Toine Hezemans (NL)/John Fitzpatrick (GB) | Weisberg-Gelo-Team (D) | DNF | 1st | 22 laps - Head Gasket |
25 June 1978 - Misano 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 935/77A | 930 890 0020 | Gr.5 | Klaus Ludwig (D)/Toine Hezemans (NL)/John Fitzpatrick (GB) | Gelo Racing Team (D) | DNF | 2nd | 137 laps - DSQ Oil Leak |
3 September 1978 - Vallelunga 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935/77A | 930 890 0020 | Gr.5 | Klaus Ludwig (D)/John Fitzpatrick (GB)/Toine Hezemans (NL) | Gelo Racing Team (D) | 3rd | 3rd | 2nd | 266 laps |
17 September 1978 - Norisring Trophäe - Non Championship Race
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935/77A | 930 890 0020 | Gr.5 | Klaus Ludwig (D) | Weisberg-Gelo-Team (D) | 17th | 15th | 3rd | 48 laps |