| 1980 · 1980 24 Hours of Le Mans | DNF | 45 | Gr.5 SP 2.0+ | Gelo Racing Team | Bob Wollek · Helmut KellenersBob Wollek Helmut Kelleners | Porsche 935-K3/79-80 | Porsche 930/80 3.2L F6 twin-turbo | 191 | Wikipedia contributors · CC BY-SA 4.0 |
| 1979 · 18th Annual 24 Hour Pepsi Challenge, Daytona International Speedway | 32 | 1 | 6. GTX | Gelo Racing Team | Bob Wollek · Jacky Ickx · Peter Gregg | Porsche 935/77 | — | 342 | WSPR historical record |
| 1979 · 18th Annual 24 Hour Pepsi Challenge, Daytona International Speedway | 50 | 2 | 2. GTX | Gelo Racing Team | Manfred Schurti · John Fitzpatrick · Bob Wollek | Porsche 935/77 | — | 135 | WSPR historical record |
| 1979 · 6 Hours of Mugello | 1 | 12 | 1. Gr.5 | Gelo Racing Team | John Fitzpatrick · Manfred Schurti · Bob Wollek | Porsche 935-77 | — | 138 | WSPR historical record |
| 1979 · 6 Hours of Mugello | 2 | 11 | 2. Gr.5 | Gelo Racing Team | Bob Wollek · Jacky Ickx · Manfred Schurti | Porsche 935-77A | — | 136 | WSPR historical record |
| 1979 · Dijon 6 Hours | 13 | 10 | 7. Gr.5 | Gelo Racing Team | Manfred Schurti · John Fitzpatrick · Bob Wollek | Porsche 935/77 | — | 215 | WSPR historical record |
| 1979 · Rivet Supply 6 Hours, Silverstone | 1 | 3 | 1. Gr.5 | Gelo Racing Team | John Fitzpatrick · Hans Heyer · Bob Wollek | Porsche 935/77 | — | 229 | WSPR historical record |
| 1979 · Rivet Supply 6 Hours, Silverstone | 5 | 2 | 3. Gr.5 | Gelo Racing Team | Manfred Schurti · Bob Wollek · John Fitzpatrick | Porsche 935/77 | — | 210 | WSPR historical record |
| 1979 · 25th 1000 km Nürburgring | 1 | 6 | 1. Gr.5 | Gelo Racing Team | Manfred Schurti · John Fitzpatrick · Bob Wollek | Porsche 935/77 | — | 44 | WSPR historical record |
| 1979 · 25th 1000 km Nürburgring | 3 | 9 | 3. Gr.5 | Gelo Racing Team | Brian Redman · Henri Pescarolo · DNS - John Fitzpatrick | Porsche 935/77A | — | 43 | WSPR historical record |
| 1979 · 25th 1000 km Nürburgring | 26 | 3 | 0. Gr.5 | Gelo Racing Team | Bob Wollek · John Fitzpatrick · Manfred Schurti · DNS - Henri Pescarolo | Porsche 935/7 | — | 31 | WSPR historical record |
| 1979 · Trofeo Ignazio Giunti, Vallelunga | entry_only | 42 | Gr.5 | Gelo Racing Team | xxx | Porsche 935/77A | — | | WSPR historical record |
| 1979 · Trofeo Ignazio Giunti, Vallelunga | entry_only | 43 | Gr.5 | Gelo Racing Team | xxx | Porsche 935/77A | — | | WSPR historical record |
| 1978 · 6 h Mugello | 1 | 12 | 1. Gr.5 | Gelo Racing Team | Toine Hezemans · Hans Heyer · John Fitzpatrick · DNS - Klaus Ludwig | Porsche 935/77 | — | 176 | WSPR historical record |
| 1978 · 6 h Mugello | 9 | 11 | 9. Gr.5 | Gelo Racing Team | John Fitzpatrick · Klaus Ludwig · Toine Hezemans | Porsche 935/77 | — | 157 | WSPR historical record |
| 1978 · 6 h Dijon | 2 | 5 | 2. Gr.5 | Gelo Racing Team | John Fitzpatrick · Hans Heyer · Toine Hezemans | Porsche 935/77 | — | 166 | WSPR historical record |
| 1978 · 6 h Dijon | retired | 6 | Gr.5 | Gelo Racing Team | Toine Hezemans · Klaus Ludwig | Porsche 935/77 | — | 101 | WSPR historical record |
| 1978 · 6 h Silverstone | 16 | 5 | 0. Gr.5 | Gelo Racing Team | Toine Hezemans · Hans Heyer · John Fitzpatrick | Porsche 935/77 | — | 178 | WSPR historical record |
| 1978 · 6 h Silverstone | retired | 6 | Gr.5 | Gelo Racing Team | Klaus Ludwig · Derek Bell · Hans Heyer | Porsche 935/77A | — | 111 | WSPR historical record |
| 1978 · 6 h Silverstone | retired | 4 | Gr.5 | Gelo Racing Team | John Fitzpatrick · Toine Hezemans | Porsche 935/77 | — | 95 | WSPR historical record |
| 1978 · 1000 km Nürburgring | 1 | 3 | 1. Gr.5 | Gelo Racing Team | Klaus Ludwig · Hans Heyer · Toine Hezemans · DNS - Derek Bell | Porsche 935/77 | — | 44 | WSPR historical record |
| 1978 · 1000 km Nürburgring | retired | 1 | Gr.5 | Gelo Racing Team | Toine Hezemans · Klaus Ludwig · John Fitzpatrick | Porsche 935/77 | — | 22 | WSPR historical record |
| 1978 · 1000 km Nürburgring | retired | 2 | Gr.5 | Gelo Racing Team | John Fitzpatrick · Hans Heyer · Toine Hezemans | Porsche 935/77A | — | 7 | WSPR historical record |
| 1978 · Misano 6 Hours | retired | 6 | Gr.5 | Gelo Racing Team | Toine Hezemans · Klaus Ludwig · John Fitzpatrick | Porsche 935/77A | — | 137 | WSPR historical record |
| 1978 · Misano 6 Hours | retired | 8 | Gr.5 | Gelo Racing Team | John Fitzpatrick · Hans Heyer · DNS - Klaus Ludwig · DNS - Toine Hezemans | Porsche 935/77 | — | 58 | WSPR historical record |
| 1978 · 6 h Vallelunga | 2 | 8 | 2. Gr.5 | Gelo Racing Team | Toine Hezemans · Hans Heyer · John Fitzpatrick · DNS - Klaus Ludwig | Porsche 935/77 | — | 267 | WSPR historical record |
| 1978 · 6 h Vallelunga | 3 | 9 | 3. Gr.5 | Gelo Racing Team | Klaus Ludwig · John Fitzpatrick · Toine Hezemans · DNS - Hans Heyer | Porsche 935/77 | — | 266 | WSPR historical record |
| 1977 · 1977 24 Hours of Le Mans | DNF | 38 | Gr.5 SP | Gelo Racing Team | Klaus Ludwig · Toine Hezemans · Hans HeyerKlaus Ludwig Toine Hezemans Hans Heyer | Porsche 935 | Porsche Type-935 2.9L F6 turbo | 15 | Wikipedia contributors · CC BY-SA 4.0 |
| 1977 · 1977 24 Hours of Le Mans | DNF | 39 | Gr.5 SP | Gelo Racing Team | Klaus Ludwig · Tim Schenken · Hans Heyer · Toine HezemansKlaus Ludwig Tim Schenken Hans Heyer Toine Hezemans | Porsche 935 | Porsche 2.9L F6 turbo | 269 | Wikipedia contributors · CC BY-SA 4.0 |
| 1977 · Kosset 6 Hours, Silverstone | 3 | 6 | 3. Gr.5 | Gelo Racing Team | Rolf Stommelen · Toine Hezemans | Porsche 935 | — | 223 | WSPR historical record |
| 1977 · Kosset 6 Hours, Silverstone | retired | 5 | Gr.5 | Gelo Racing Team | Tim Schenken · Derek Bell · DNS - Rolf Stommelen · DNS - Toine Hezemans | Porsche 935 | — | 61 | WSPR historical record |
| 1977 · ADAC 1000 km Nürburgring | 1 | 3 | 1. Gr.5 | Gelo Racing Team | Tim Schenken · Rolf Stommelen · Toine Hezemans · DNS - Derek Bell | Porsche 935 | — | 44 | WSPR historical record |
| 1977 · ADAC 1000 km Nürburgring | retired | 2 | Gr.5 | Gelo Racing Team | Rolf Stommelen · Toine Hezemans · DNS - Tim Schenken | Porsche 935 | — | 5 | WSPR historical record |
| 1977 · Rivet Supply 6 Hours, Brands Hatch | entry_only | - | Gr.5 | Gelo Racing Team | Rolf Stommelen · Toine Hezemans | Porsche 935 | — | | WSPR historical record |
| 1976 · 1976 24 Hours of Le Mans | 16 | 57 | Gp.4 GT | Gelo Racing Team | Tim Schenken · Toine HezemansTim Schenken Toine Hezemans | Porsche 934 | Porsche 3.0L F6 turbo | 277 | Wikipedia contributors · CC BY-SA 4.0 |
| 1976 · 1976 24 Hours of Le Mans | DNF | 49 | Gp.5 SP | Gelo Racing Team | Howden GanleyClemens Schickentanz Howden Ganley | Porsche 911 Carrera RSR | Porsche 3.0L F6 | 74 | Wikipedia contributors · CC BY-SA 4.0 |
| 1976 · ADAC-Goodyear-Pokal, 300 Kilometres Nürburgring | 2 | 51 | 1. GT+3.0 | Gelo Racing Team | Toine Hezemans | Porsche 934 Tu | — | 11 | WSPR historical record |
| 1976 · ADAC-Goodyear-Pokal, 300 Kilometres Nürburgring | 7 | 52 | 3. GT+3.0 | Gelo Racing Team | Tim Schenken · DNS - Clemens Schickentanz | Porsche 934 Tu | — | 11 | WSPR historical record |
| 1976 · World Championship of Maker, 6 Hours of Silverstone | entry_only | 11 | GT | Gelo Racing Team | Tim Schenken | Porsche Carrera RSR | — | | WSPR historical record |
| 1976 · World Championship of Maker, 6 Hours of Silverstone | entry_only | 12 | GT | Gelo Racing Team | Toine Hezemans · Clemens Schickentanz | Porsche Carrera RSR | — | | WSPR historical record |
| 1976 · ADAC 1000 Kilometres, Nürburgring | 2 | 6 | 2. Gr.5 | Gelo Racing Team | Toine Hezemans · Tim Schenken | Porsche 934/5 | — | 47 | WSPR historical record |
| 1976 · ADAC 1000 Kilometres, Nürburgring | retired | 22 | GT | Gelo Racing Team | Clemens Schickentanz · Herbert Müller · DNS - Tim Schenken | Porsche 934 Tu | — | 1 | WSPR historical record |
| 1976 · ADAC 1000 Kilometres, Nürburgring | entry_only | 21 | GT | Gelo Racing Team | Tim Schenken · Toine Hezemans | Porsche 934 | — | | WSPR historical record |
| 1976 · ADAC 1000 Kilometres, Nürburgring | entry_only | 31 | Gr.5 | Gelo Racing Team | Howden Ganley · Herbert Müller | Porsche Carrera RSR | — | | WSPR historical record |
| 1976 · ACF 6 Hours Dijon | entry_only | 17 | Gr.5 | Gelo Racing Team | Toine Hezemans · Tim Schenken | Porsche 934/5 Turbo | — | | WSPR historical record |
| 1975 · 1975 24 Hours of Le Mans | 5 | 58 | GTS | Gelo Racing Team | Gijs van Lennep · John Fitzpatrick · Manfred Schurti · Toine HezemansGijs van Lennep John Fitzpatrick Manfred Schurti Toine Hezemans | Porsche 911 Carrera RSR | Porsche 3.0L F6 | 316 | Wikipedia contributors · CC BY-SA 4.0 |
| 1975 · 1975 24 Hours of Le Mans | DNF | 59 | GTS | Gelo Racing Team | Tim Schenken · Howden GanleyTim Schenken Howden Ganley | Porsche 911 Carrera RSR | Porsche 3.0L F6 | 106 | Wikipedia contributors · CC BY-SA 4.0 |
| 1975 · 1975 24 Hours of Le Mans | DNF | 60 | GTS | Gelo Racing Team | Toine Hezemans · Manfred SchurtiToine Hezemans Manfred Schurti | Porsche 911 Carrera RSR | Porsche 3.0L F6 | 41 | Wikipedia contributors · CC BY-SA 4.0 |
| 1975 · 1000 km Mugello (150 laps) | 9 | 44 | 1. GT | Gelo Racing Team | Manfred Schurti · Toine Hezemans · John Fitzpatrick · DNS - Franz Pesch · DNS - Georg Loos | Porsche Carrera RSR | — | 134 | WSPR historical record |
| 1975 · 1000 km Mugello (150 laps) | 11 | 45 | 3. GT | Gelo Racing Team | John Fitzpatrick · Toine Hezemans · Manfred Schurti | Porsche Carrera RSR | — | 133 | WSPR historical record |
| 1975 · 1000 km Mugello (150 laps) | retired | 14 | S3.0 | Gelo Racing Team | Jochen Mass · Tim Schenken | Gulf Mirage GR7 Ford | — | | WSPR historical record |
| 1975 · 800 km Dijon | 5 | 33 | 1. GT | Gelo Racing Team | John Fitzpatrick · Toine Hezemans | Porsche Carrera RSR | — | 220 | WSPR historical record |
| 1975 · 800 km Dijon | entry_only | - | S3.0 | Gelo Racing Team | xxx | Mirage GR7 Ford | — | | WSPR historical record |
| 1975 · Trofeo F. Carraciolo, Monza | 6 | 77 | 5. S3.0 | Gelo Racing Team | Toine Hezemans · Manfred Schurti · John Fitzpatrick | Porsche Carrera RSR | — | 159 | WSPR historical record |
| 1975 · Trofeo F. Carraciolo, Monza | 7 | 78 | 6. S3.0 | Gelo Racing Team | John Fitzpatrick · Toine Hezemans · Manfred Schurti | Porsche Carrera RSR | — | 158 | WSPR historical record |
| 1975 · Trofeo F. Carraciolo, Monza | 20 | 8 | 9. S3.0 | Gelo Racing Team | Jochen Mass · Tim Schenken | Mirage GR7 Ford | — | 128 | WSPR historical record |
| 1975 · Spa 1000 Kilometres, Spa-Francorchamps | 9 | 45 | 5. GT | Gelo Racing Team | Toine Hezemans · Tim Schenken · John Fitzpatrick · DNS - Manfred Schurti | Porsche Carrera RSR | — | 47 | WSPR historical record |
| 1975 · Spa 1000 Kilometres, Spa-Francorchamps | 11 | 44 | 6. GT | Gelo Racing Team | John Fitzpatrick · Manfred Schurti · Tim Schenken · DNS - Toine Hezemans | Porsche Carrera RSR | — | 45 | WSPR historical record |
| 1975 · Spa 1000 Kilometres, Spa-Francorchamps | entry_only | 8 | S3.0 | Gelo Racing Team | Tim Schenken · Jochen Mass | Mirage GR7 Ford | — | | WSPR historical record |
| 1975 · 1000 km Nürburgring | 2 | 4 | 2. S3.0 | Gelo Racing Team | Howden Ganley · Tim Schenken | Mirage Gulf GR7 Ford | — | 44 | WSPR historical record |
| 1975 · 1000 km Nürburgring | 9 | 51 | 2. GT+1.6 | Gelo Racing Team | John Fitzpatrick · Toine Hezemans · Manfred Schurti | Porsche Carrera RS | — | 40 | WSPR historical record |
| 1975 · 1000 km Nürburgring | 11 | 52 | 3. GT+1.6 | Gelo Racing Team | Toine Hezemans · Gijs van Lennep · Claude Ballot-Léna | Porsche Carrer | — | 40 | WSPR historical record |
| 1975 · 1000 km Nürburgring | retired | 5 | S3.0 | Gelo Racing Team | John Watson · Tom Pryce | Mirage Gulf GR7 Ford | — | 27 | WSPR historical record |
| 1975 · 1000 km Nürburgring | retired | 53 | GT+1.6 | Gelo Racing Team | Manfred Schurti · Klaus Ludwig · DNS - Claude Ballot-Léna | Porsche Carrera RSR | — | 27 | WSPR historical record |
| 1975 · 1000 km Zeltweg | entry_only | - | S3.0 | Gelo Racing Team | Tim Schenken · Howden Ganley | Mirage GR7 Ford | — | | WSPR historical record |
| 1973 · 1973 24 Hours of Le Mans | 10 | 63 | GTS 3.0 | Gelo Racing Team | Georg Loos · Jürgen BarthGeorg Loos Jürgen Barth | Porsche 911 Carrera RSR | Porsche 2.8L F6 | 311 | Wikipedia contributors · CC BY-SA 4.0 |
| 1973 · Spa 1000 Kilometres | entry_only | 45 | GT | Gelo Racing Team | Georg Loos | Porsche Carrer | — | | WSPR historical record |
| 1972 · 1972 24 Hours of Le Mans | DNS | 78 (reserve) | GTS 2.5 | Gelo Racing Team | Jean Sage Georg Loos Pierre Greub | Porsche 911 S | Porsche 2492cc F6 | | Wikipedia contributors · CC BY-SA 4.0 |
| 1972 · Austrian 1000 Kilometres, Zeltweg | entry_only | 39 | GT | Gelo Racing Team | Franz Pesch | Porsche 911S | — | | WSPR historical record |
| 1972 · Austrian 1000 Kilometres, Zeltweg | entry_only | 40 | GT | Gelo Racing Team | Georg Loos | Porsche 911S | — | | WSPR historical record |
| 1972 · Monza 1000 Kilometres | did_not_qualify | 46 | GT+2.0 | Gelo Racing Team | Georg Loos · Franz Pesch | Porsche 911S | — | | WSPR historical record |
| 1972 · Spa 1000 Kilometres | entry_only | 50 | GT | Gelo Racing Team | Georg Loos · Franz Pesch | Porsche 911S | — | | WSPR historical record |
| 1972 · ADAC 1000 Kilometres, Nürburgring | did_not_qualify | 61 | GT+2.0 | Gelo Racing Team | Georg Loos | Porsche 911S | — | | WSPR historical record |
| 1972 · ADAC 1000 Kilometres, Nürburgring | did_not_qualify | 62 | GT+2.0 | Gelo Racing Team | Franz Pesch | Porsche 911S | — | | WSPR historical record |
| 1971 · 1971 24 Hours of Le Mans | DNF | 10 | S 5.0 | Gelo Racing Team | Georg LoosGeorg Loos Franz Pesch | Ferrari 512 M | Ferrari 5.0L V12 | 63 | Wikipedia contributors · CC BY-SA 4.0 |
| 1971 · ADAC 1000 Kilometres, Nürburgring | 9 | 59 | 2. S5.0 | Gelo Racing Team | Georg Loos · Franz Pesch | Ferrari 512M | — | 40 | WSPR historical record |
| 1971 · ADAC 1000 Kilometres, Nürburgring | did_not_start | 106 | GT2.0 | Gelo Racing Team | Robert F. Huhn · Helmut Gall · Franz Pesch | Porsche 911S | — | | WSPR historical record |
| 1970 · BOAC 1000 Kilometres, Brands Hatch | did_not_start | 4 | S5.0 | Gelo Racing Team | Georg Loos · Jonathan Williams | Ferrari 512S | — | | WSPR historical record |
| 1970 · 1000 km Monza | did_not_qualify | 6 | S5.0 | Gelo Racing Team | Georg Loos · Franz Pesch | Ferrari 512S | — | | WSPR historical record |