PORSCHE RACING HISTORYPorsche 935/77A - Chassis No. 930 890 0020
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 |
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 |
11 March 1979 - DRM Zolder Bergischer Löwe - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear International (D) | 7th | 7th | 2nd | 24 laps |
18 March 1979 - Mugello 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 11 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F)/Jacky Ickx (B)/Manfred Schurti (FL) | Gelo Racing Team (D) | 2nd | 2nd | 4th | 136 laps |
8 April 1979 - DRM Hockenheim Jim Clark - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 5th | 5th | 1st | 20 laps |
22 April 1979 - Dijon 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 10 | Porsche 935/77A | 930 890 0020 | Gr.5 | Manfred Schurti (FL)/John Fitzpatrick (GB)/Bob Wollek (F) | Gelo Racing Team (D) | 13th | 7th | 2nd | 215 laps |
29 April 1979 - DRM Nürburgring Eifelrennen - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 1st | 1st | 2nd | 7 laps |
20 May 1979 - DRM Salzburgring - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 2nd | 2nd | 2nd | 24 laps |
3 June 1979 - 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 | Bob Wollek (F)/John Fitzpatrick (GB)/Manfred Schurti (FL) | Gelo Racing Team (D) | 26th | 14th | 3rd | 31 laps - Piston |
17 June 1979 - DRM Mainz-Finthen - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 3rd | 3rd | 3rd | 50 laps |
24 June 1979 - DRM Norisring - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 17th | 10th | 1st | 10 laps |
1 July 1979 - DRM Zandvoort - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 2nd | 2nd | 3rd | 25 laps |
22 July 1979 - DRM Diepholz - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 2nd | 2nd | 4th | 40 laps |
19 August 1979 - DRM Zolder Westfalen-Pokal - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 2nd | 2nd | 3rd | 24 laps |
2 September 1979 - DRM Hockenheim Hessen Cup - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 5th | 5th | 2nd | 40 laps |
23 September 1979 - DRM Nürburgring Supersprint - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 935/77A | 930 890 0020 | Gr.5 | Bob Wollek (F) | GELO Sportswear Team (D) | 2nd | 2nd | 4th | 44 laps |
1 June 1980 - DRM Spa - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| Porsche 935/77A | 930 890 0020 | Gr.5 | Jürgen Barth (D) | Sportwagen (D) | DNF | 8th | 1 lap |
7 September 1980 - Vallelunga 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 935/77A | 930 890 0020 | Gr.5 | Henri Pescarolo (F)/Jürgen Barth (D) | Sportwagen (D) | 7th | 3rd | 17th | 260 laps |
28 September 1980 - Dijon 1000 Kilometres - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 935/77A | 930 890 0020 | Gr.5+2.0 | Henri Pescarolo (F)/Jürgen Barth (D) | Sportwagen (D) | 1st | 1st | 5th | 180 laps |