| 4.5.1975 | 100 mile Laguna Seca II | 1 | #911 460 9049 | Michael Keyser | | 2nd |
| 4.5.1975 | 100 mile Laguna Seca II | 9 | #911 360 0610 | Juan Carlos Bolanos | | 30th |
| 4.5.1975 | 100 mile Laguna Seca I | 9 | #911 360 0610 | Juan Carlos Bolanos | | 21st |
| 4.5.1975 | 100 mile Laguna Seca II | 14 | #005 0009 | Al Holbert | | 5th |
| 4.5.1975 | 100 mile Laguna Seca I | 14 | #005 0009 | Al Holbert | | 42nd |
| 4.5.1975 | 100 mile Laguna Seca II | 30 | #911 460 9048 | George Dyer | George Dyer | 6th |
| 4.5.1975 | 1000 km Spa | 41 | #911 460 9067 | Schickentanz / Bertrams / Wisell | Tebernum Racing | 6th |
| 4.5.1975 | 1000 km Spa | 42 | #911 460 9052 | Haldi / Béguin | Club Romand | 4th |
| 4.5.1975 | 1000 km Spa | 43 | #911 460 9051 | Ballot-Léna / Andruet | Ecurie Buchet | 5th |
| 4.5.1975 | 1000 km Spa | 44 | #911 460 9040 | Fitzpatrick / Schurti / Schenken | Gelo Racing | 11th |
| 4.5.1975 | 1000 km Spa | 52 | #004 0004 | Corthay / Morand | Ecurie Rolloise | DNF |
| 4.5.1975 | 100 mile Laguna Seca II | 59 | | Peter Gregg | | 4th |
| 10.5.1975 | 6 h Riverside | 1 | #911 460 9049 | Keyser / Sprowls | Toad Hall/ASCA | 6th |
| 10.5.1975 | 6 h Riverside | 9 | #911 360 0610 | Bolanos / Jourdain | Toad Hall/ASCA | 9th |
| 10.5.1975 | 6 h Riverside | 30 | #911 460 9048 | Dyer / Bienvenue | George Dyer | 30th |
| 10.5.1975 | 6 h Riverside | 59 | | Gregg / Haywood | Brumos Porsche | 3rd |
| 10.5.1975 | 6 h Riverside | 61 | #911 560 9122 | Busby / Hiss | Beverly Porsche Audi/Mitcom Inc. | 8th |
| 10.5.1975 | 6 h Riverside | 95 | #911 460 9057 | Hagestad / Holbert | Bob Hagestad | 11th |
| 11.5.1975 | Junioren Trophy Zandvoort | 190 | #004 0005 | Hans Halfmann | Tebernum-Porsche-Racing-Team | 2nd |
| 11.5.1975 | Junioren Trophy Zandvoort | 194 | #911 460 9062 | Günther Chrzanowski | Günther Chrzanowski | 1st |
| 11.5.1975 | Saarlouis [GT] | | #005 0005 | Helmut Kelleners | Jägermeister-Kremer-Team | 1st |
| 11.5.1975 | SM Casale | | #911 460 9053 | Edi Kofel | | 3rd |
| 18.5.1975 | Coppa Florio | 47 | #911 460 9067 | Schickentanz / Bertrams / Wisell | Tebernum Porsche Racing Team | 5th |
| 18.5.1975 | Coppa Florio | | #005 0003 | Restivo / Merendino | | DNA |
| 18.5.1975 | Coppa Florio | | #911 460 9040 | Hezemans / Fitzpatrick | Gelo Racing Team | DNA |
| 19.5.1975 | NTK Zandvoort | 64 | #005 0004 | Cees Siewertsen | Florence Hill | 1st |
| 25.5.1975 | Euro GT Zeltweg | 1 | #911 460 9040? | John Fitzpatrick | Gelo Racing Team | 8th |
| 25.5.1975 | Euro GT Zeltweg | 3 | #911 460 9052 | Claude Haldi | Porsche Club Romand | 5th |
| 25.5.1975 | Euro GT Zeltweg | 4 | #911 460 9051 | Claude Ballot-Léna | Ecurie Robert Buchet | 3rd |
| 25.5.1975 | Euro GT Zeltweg | 5 | #911 460 9067 | Clemens Schickentanz | Tebernum Porsche Racing Team | 1st |
| 25.5.1975 | Euro GT Zeltweg | 9 | #911 460 9058 | William Vollery | Gante Racing | DNA |
| 25.5.1975 | Euro GT Zeltweg | 16 | #005 0004 | Dieter Quester | Porsche-Kremer Racing | 2nd |
| 26.5.1975 | 100 mile Lime Rock II | 1 | #911 460 9049 | Michael Keyser | | DNS |
| 26.5.1975 | 100 mile Lime Rock I | 1 | #911 460 9049 | Michael Keyser | | 5th |
| 26.5.1975 | 100 mile Lime Rock II | 14 | #005 0009 | Al Holbert | | 1st |
| 26.5.1975 | 100 mile Lime Rock I | 14 | #005 0009 | Al Holbert | | 3rd |
| 26.5.1975 | 100 mile Lime Rock II | 30 | #911 460 9048 | George Dyer | George Dyer | 7th |
| 26.5.1975 | 100 mile Lime Rock I | 30 | #911 460 9048 | George Dyer | George Dyer | 13th |
| 26.5.1975 | 100 mile Lime Rock I | 59 | | Peter Gregg | | 1st |
| 26.5.1975 | 100 mile Lime Rock II | 59 | | Peter Gregg | | 2nd |
| 26.5.1975 | 100 mile Lime Rock I | 61 | #911 560 9122 | Jim Busby | | 9th |
| 26.5.1975 | 100 mile Lime Rock II | 61 | #911 560 9122 | Jim Busby | | 8th |
| 1.6.1975 | 100 mile Mid-Ohio | 1 | #911 460 9049 | Michael Keyser | | 14th |
| 1.6.1975 | 100 mile Mid-Ohio | 14 | #005 0009 | Al Holbert | | 1st |
| 1.6.1975 | 100 mile Mid-Ohio | 30 | #911 460 9048 | George Dyer | George Dyer | 29th |
| 1.6.1975 | 1000 km Nürburgring | 52 | #911 460 9063 | Hezemans / van Lennep / Ballot-Léna | GELO-Racing-Team, Georg Loos KG | 11th |
| 1.6.1975 | 1000 km Nürburgring | 54 | #005 0005 | Heyer / Kelleners / Wollek | Jägermeister-Kremer-Team | 8th |
| 1.6.1975 | 1000 km Nürburgring | 57 | | Brambring / Neuhaus | Josef Brambring | DNF |
| 1.6.1975 | 1000 km Nürburgring | 58 | #911 460 9067 | Schickentanz / Bertrams / Wisell | Tebernum-Porsche-Racing-Team | 14th |
| 1.6.1975 | 100 mile Mid-Ohio | 59 | | Peter Gregg | | 26th |
| 1.6.1975 | 1000 km Nürburgring | 60 | #911 460 9052 | Haldi / Béguin | Porsche-Club-Romand | 20th |
| 1.6.1975 | 100 mile Mid-Ohio | 61 | #911 560 9122 | Jim Busby | | 9th |
| 1.6.1975 | 1000 km Nürburgring | 61 | #911 460 9058 | Zbinden / Dorchy | Porsche-Club-Romand | 21st |
| 1.6.1975 | 1000 km Nürburgring | 62 | #004 0002 | Rulon-Miller / Waugh | Gante-Racing | DNF |
| 1.6.1975 | 100 mile Mid-Ohio | 95 | #911 460 9057 | Bob Hagestad | | 5th |
| 8.6.1975 | DRM Hockenheim Rhein-Pokal | 45 | #911 460 9067 | Clemens Schickentanz | Tebernum Porsche Racing | DNF |
| 8.6.1975 | DRM Hockenheim Rhein-Pokal | 46 | #005 0005 | Helmut Kelleners | Jägermeister Kremer Team | 3rd |
| 8.6.1975 | DRM Hockenheim Rhein-Pokal | 49 | #005 0004 | Cees Siewertsen | Jägermeister Kremer Team | 6th |
| 8.6.1975 | DRM Hockenheim Rhein-Pokal | 53 | | Josef Brambring | Josef Brambring | DNF |
| 14.6.1975 | 100 mile Mosport | 1 | #911 460 9049 | Michael Keyser | Toad Hall Racing | DNA |
| 14.6.1975 | 100 mile Mosport | 14 | #005 0009 | Al Holbert | Holbert's Porsche+Audi | 9th |
| 14.6.1975 | 100 mile Mosport | 30 | #911 460 9048 | George Dyer | Dyer Racing | 7th |
| 14.6.1975 | 100 mile Mosport | 59 | | Peter Gregg | Brumos Porsche+Audi | 4th |
| 14.6.1975 | 100 mile Mosport | 95 | #911 460 9057 | Bob Hagestad | Bob Hagestad Porsche+Audi | 8th |
| 15.6.1975 | 24 h Le Mans | 52 | #911 460 9058 | Vollery / Dorchy / Chapuis | Ecurie du Nord | DNF |
| 15.6.1975 | 24 h Le Mans | 55 | #911 460 9051 | Ballot-Léna / Bienvenue | Ecurie Robert Buchet | 8th |
| 15.6.1975 | 24 h Le Mans | 57 | #004 0002 | Rulon-Miller / Waugh / Godard | Gante Racing | DNF |
| 15.6.1975 | 24 h Le Mans | 58 | #911 460 9065 | Fitzpatrick / Hezemans / van Lennep / Schurti / Loos | Gelo Racing Team | 5th |
| 15.6.1975 | DRM Mainz-Finthen | 59 | #911 460 9067 | Hartwig Bertrams | Tebernum Porsche Racing Team | DNF |
| 15.6.1975 | 24 h Le Mans | 60 | #911 460 9040 | Schurti / Hezemans | Gelo Racing Team | DNF |
| 15.6.1975 | 24 h Le Mans | 61 | #911 360 1196 | Bussi / Metral | Ecurie Armagnac-Bigorre Gérard Méo | 23rd |
| 15.6.1975 | 24 h Le Mans | 62 | #911 460 9052 | Haldi / Fernandez / Perez / Chiribiga | Escuderia Montjuich | DNS |
| 15.6.1975 | 24 h Le Mans | 68 | #004 0004 | Vetsch / Verrier / Corthay | Guy Verrier | DNF |
| 15.6.1975 | DRM Mainz-Finthen | | #005 0005 | Helmut Kelleners | Jägermeister Kremer Team | 2nd |
| 15.6.1975 | Hügelheim Hockenheim [GT] | | #911 230 0818 | Hans Forster | Hans Forster | 3rd |
| 22.6.1975 | NTK Zandvoort | 89 | | Rob Slotemaker | Tebernum Racing Team | 2nd |
| 29.6.1975 | Norisring Trophäe | 1 | #911 460 9040 | John Fitzpatrick | Gelo Racing Team Georg Loos | 2nd |
| 29.6.1975 | Euro GT Norisring | 1 | #911 460 9040 | John Fitzpatrick | Gelo Racing Team Georg Loos | 1st |
| 29.6.1975 | Norisring Trophäe | 2 | | Toine Hezemans | Gelo Racing Team Georg Loos | 1st |
| 29.6.1975 | Euro GT Norisring | 2 | | Toine Hezemans | Gelo Racing Team Georg Loos | 2nd |
| 29.6.1975 | Euro GT Norisring | 5 | #005 0004 | Cees Siewertsen | Erwin Kremer | 6th |
| 29.6.1975 | Euro GT Norisring | 7 | #911 460 9067 | Hartwig Bertrams | Tebernum Porsche | DNF |
| 29.6.1975 | DRM Norisring | 7 | #911 460 9067 | Hartwig Bertrams | Tebernum Porsche Racing Team | DNS |
| 29.6.1975 | DRM Norisring | 9 | #911 460 9052 | Claude Haldi | Porsche Club Romand | DNS |
| 29.6.1975 | Norisring Trophäe | 9 | #911 460 9052 | Claude Haldi | Porsche Club Romand | 5th |
| 29.6.1975 | Euro GT Norisring | 9 | #911 460 9052 | Claude Haldi | Porsche Club Romand | 4th |
| 29.6.1975 | Euro GT Norisring | 11 | #911 460 9051 | Claude Ballot-Léna | Ecurie Robert Buchet | DNA |
| 29.6.1975 | Euro GT Norisring | 12 | #911 360 1088 | Cyril Grandet | Ecurie Robert Buchet | DNA |
| 29.6.1975 | Euro GT Norisring | 14 | | Jürgen Neuhaus | Josef Brambring | DNA |
| 29.6.1975 | DRM Norisring | 35 | #005 0005 | Helmut Kelleners | Jägermeister Kremer Team | T-car |
| 29.6.1975 | Norisring Trophäe | 35 | #005 0005 | Helmut Kelleners | Jägermeister Kremer Team | 4th |
| 29.6.1975 | DRM Norisring | 41 | | Josef Brambring | Josef Brambring | DNA |
| 4.7.1975 | 250 mile Daytona Paul Revere | 1 | #911 460 9049 | Michael Keyser | Toad Hall Racing | 24th |
| 4.7.1975 | 250 mile Daytona Paul Revere | 14 | #005 0009 | Al Holbert | Holbert's Porsche | 3rd |
| 4.7.1975 | 250 mile Daytona Paul Revere | 30 | #911 460 9048 | George Dyer | George Dyer | 4th |
| 4.7.1975 | 250 mile Daytona Paul Revere | 58 | #911 460 9054 | Febles / Cruz | | 11th |
| 4.7.1975 | 250 mile Daytona Paul Revere | 59 | | Peter Gregg | Brumos Porsche | 37th |
| 4.7.1975 | 250 mile Daytona Paul Revere | 61 | #911 560 9122 | Jim Busby | Beverly Porsche/Audi | 7th |
| 4.7.1975 | 250 mile Daytona Paul Revere | 95 | #911 460 9057 | Bob Hagestad | Bob Hagestad | DNA |
| 6.7.1975 | Karlsruhe Hockenheim [GT] | | #004 0005 | Hans Halfmann | Tebernum-Porsche-Racing Team | 5th |