| 4.5.1975 | 100 mile Laguna Seca I | 41 | 911 S | Charly Godecke | | DNS |
| 4.5.1975 | 1000 km Spa | 47 | 911 Carrera RS | Vanoli / Pallavicini | Pallvano Corse | DNA |
| 4.5.1975 | 1000 km Spa | 48 | 911 Carrera RSR | Hubert Striebig | Striebig | DNA |
| 4.5.1975 | 1000 km Spa | 50 | 911 Carrera RSR | Chateau / Cayeux | Chateau | DNS |
| 4.5.1975 | 1000 km Spa | 52 | 911 Carrera RSR 3.0 | Corthay / Morand | Ecurie Rolloise | DNF |
| 4.5.1975 | 100 mile Laguna Seca I | 58 | 911 S | Adrian Gang | | DNS |
| 4.5.1975 | DARM Sembach [GT] | | 914/6 | Hans Christian Jürgensen | Hans Christian Jürgensen | ?th |
| 4.5.1975 | DARM Sembach [GT] | | 911 Carrera RSR | Manfred Borbonus | Manfred Borbonus | 7th |
| 4.5.1975 | DARM Sembach [GT] | | 914/6 | Peter Karl Nowak | Peter-Karl Nowak | ?th |
| 4.5.1975 | DARM Sembach [GT] | | 914/6 | Alberto Zirkel | Bergischer Motorclub e.V. | ?th |
| 4.5.1975 | DARM Sembach [GT] | | 911 Carrera RSR 3.0 | Hans Halfmann | Tebernum-Porsche-Racing-Team | 6th |
| 4.5.1975 | DARM Sembach [GT] | | 911 Carrera RSR | Günther Chrzanowski | Günter Chrzanowski | 3rd |
| 4.5.1975 | DARM Sembach [GT] | | 911 Carrera RSR 3.0 | Edi Kofel | | 2nd |
| 4.5.1975 | DARM Sembach [GT] | | 911 Carrera | Gerhard Holup | Gerhard Holup | 5th |
| 4.5.1975 | DARM Sembach [GT] | | 911 Carrera RSR | Eugen Kiemele | Eugen Kiemele | 4th |
| 4.5.1975 | DARM Sembach [GT] | | 914/6 | Edgar Dören | Bergischer Motorclub e.V. | ?th |
| 4.5.1975 | DARM Sembach [GT] | | 914/6 | Manfred Laub | Autohaus Max Moritz GmbH | ?th |
| 4.5.1975 | DARM Sembach [GT] | | 914/6 | Wilhelm Siegle | Wilhelm Siegle | ?th |
| 4.5.1975 | DARM Sembach [GT] | | 914/6 | Albrecht Schütz | Autohaus Max Moritz GmbH | ?th |
| 4.5.1975 | DARM Sembach [GT] | | 911 Carrera RSR | Eberhard Sindel | Rallye Gemeinschaft Ulm | 1st |
| 8.5.1975 | Renntraining Diepholz | | 911 Carrera RS | Claus Kathner-Diercks | | ?th |
| 8.5.1975 | Renntraining Diepholz | | 911 Carrera RS | Uwe Machel | | ?th |
| 8.5.1975 | Renntraining Diepholz | | 914/6 | Hans Christian Jürgensen | | 1st |
| 10.5.1975 | 6 h Riverside | 00 | 911 ST | Lindley / Wilson | - | 32nd |
| 10.5.1975 | 6 h Riverside | 1 | 911 Carrera RSR 3.0 | Keyser / Sprowls | Toad Hall/ASCA | 6th |
| 10.5.1975 | 6 h Riverside | 5 | 911 Carrera RSR | Harmon / Woodner | - | 34th |
| 10.5.1975 | 6 h Riverside | 8 | 911 S | Ohlander / Crabbe / Cook | Terry Glass | 35th |
| 10.5.1975 | 6 h Riverside | 9 | 911 Carrera RSR 3.0 | Bolanos / Jourdain | Toad Hall/ASCA | 9th |
| 10.5.1975 | 6 h Riverside | 23 | 911 Carrera RSR | Kemp / Baird | Armorall Racing Team | 4th |
| 10.5.1975 | 6 h Riverside | 30 | 911 Carrera RSR 3.0 | Dyer / Bienvenue | George Dyer | 30th |
| 10.5.1975 | 6 h Riverside | 38 | 911 S | Bauer / Baker | - | 18th |
| 10.5.1975 | 6 h Riverside | 41 | 911 S | Laakmann / Godecke | - | 24th |
| 10.5.1975 | 6 h Riverside | 43 | 911 Carrera RSR | O'Steen / Helmick | - | 7th |
| 10.5.1975 | 6 h Riverside | 50 | 911 S | Freeman / Ward | Beverly Porsche Audi/Mitcom Inc. | 15th |
| 10.5.1975 | 6 h Riverside | 51 | 914/6 | Kirby / Jones | Max-Dial | 40th |
| 10.5.1975 | 6 h Riverside | 59 | 911 Carrera RSR 3.0 | Gregg / Haywood | Brumos Porsche | 3rd |
| 10.5.1975 | 6 h Riverside | 61 | 911 Carrera RSR 3.0 | Busby / Hiss | Beverly Porsche Audi/Mitcom Inc. | 8th |
| 10.5.1975 | 6 h Riverside | 79 | 911 Carrera RSR | Callas / Gang | - | 12th |
| 10.5.1975 | 6 h Riverside | 80 | 914/6 | Polich / Basurto | Montgomery Real Estate | 17th |
| 10.5.1975 | 6 h Riverside | 81 | 911 Carrera RSR | Forbes-Robinson / Minter | Pharr West | 5th |
| 10.5.1975 | 6 h Riverside | 86 | 911 S | Borsos / Aase / Meister | - | 13th |
| 10.5.1975 | 6 h Riverside | 95 | 911 Carrera RSR 3.0 | Hagestad / Holbert | Bob Hagestad | 11th |
| 10.5.1975 | 6 h Riverside | 96 | 914/6 | Mandella / Thomas | - | 37th |
| 11.5.1975 | MEZ MR CZ Havířov | 13 | 911 Carrera | Dušan Velímský | ARC Brno | 4th |
| 11.5.1975 | MEZ MR CZ Havířov | 17 | 911 Carrera RSR | Willy Rabl | | 2nd |
| 11.5.1975 | Junioren Trophy Zandvoort | 190 | 911 Carrera RSR 3.0 | Hans Halfmann | Tebernum-Porsche-Racing-Team | 2nd |
| 11.5.1975 | Junioren Trophy Zandvoort | 194 | 911 Carrera RSR 3.0 | Günther Chrzanowski | Günther Chrzanowski | 1st |
| 11.5.1975 | Junioren Trophy Zandvoort | 198 | 911 Carrera RSR 2.8 | | | DNF |
| 11.5.1975 | Saarlouis [GT] | | 911 Carrera RSR 3.0 | Helmut Kelleners | Jägermeister-Kremer-Team | 1st |
| 11.5.1975 | Saarlouis [GT] | | 911 Carrera RSR | Heinz-Jörgen Dahmen | Heinz-Jürgen Dahmen | 2nd |
| 11.5.1975 | Mantorp Park | | 911 S | Göran Ahlström | SMK Gävle | 7th |
| 11.5.1975 | Mantorp Park | | 911 Carrera RSR | Roland Larsson | Falkenbergs MK | 2nd |
| 11.5.1975 | Saarlouis [GT] | | 914/6 | Peter Karl Nowak | Peter-Karl Nowak | ?th |
| 11.5.1975 | Mantorp Park | | 911 Carrera RSR | Jan Lundgårdh | Hässelholms MK | ?th |
| 11.5.1975 | Junioren Trophy Zandvoort | | 911 Carrera RS | Claus Kathner-Diercks | Claus Kathner-Diercks | 6th |
| 11.5.1975 | Junioren Trophy Zandvoort | | 911 Carrera RS | Ralf-Dieter Schreiber | Ralf-Dieter Schreiber | 4th |
| 11.5.1975 | Junioren Trophy Zandvoort | | 911 S | Ernst Zupp | Ernst Zupp | 5th |
| 11.5.1975 | Saarlouis [GT] | | 911 Carrera RSR | Richard Leder | Richard Leder | 3rd |
| 11.5.1975 | Saarlouis [Main] | | 911 Carrera RSR | Richard Leder | Richard Leder | 2nd |
| 11.5.1975 | Junioren Trophy Zandvoort | | 911 Carrera RS | Dieter Schornstein | Dieter Schornstein | 3rd |
| 11.5.1975 | SM Casale | | 911 Carrera RSR 3.0 | Edi Kofel | | 3rd |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | 1 | 911 Carrera | | | DNE |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | 3 | 911 Carrera RSR | | | DNE |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | 4 | 911 Carrera RSR | | | DNE |
| 18.5.1975 | Coppa Florio | 4 | 908/3 Turbo | Jöst / Casoni | Scuderia Nettuno Ovoro | 3rd |
| 18.5.1975 | Coppa Florio | 5 | 908/3 | Barth / Kraus | Scuderia Nettuno | NC |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | 5 | 911 Carrera RSR | | | DNE |
| 18.5.1975 | Coppa Florio | 7 | 908/3-6 Turbo | Kinnunen / Müller | Dr. H. Dannesberger | 7th |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | 7 | 911 Carrera RSR | | | DNE |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | 8 | 914/6 | | | DNE |
| 18.5.1975 | GP Brno | 9 | 911 Carrera | Dušan Velímský | Zetor AMK | DNA |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | 10 | 914/6 | | | DNE |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | 11 | 914/6 | Albrecht Schütz | Autohaus Max Moritz | ?th |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | 15 | 914/6 | | | DNE |
| 18.5.1975 | Coppa Florio | 47 | 911 Carrera RSR 3.0 | Schickentanz / Bertrams / Wisell | Tebernum Porsche Racing Team | 5th |
| 18.5.1975 | Coppa Florio | 48 | 911 Carrera RSR | Bertrams / Wisell / Schickentanz | Tebernum Porsche Racing Team | 4th |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | | 911 Carrera | | | DNF |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | | 914/6 | Klaus Erle | Klaus Erle | ?th |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | | 911 Carrera | | | DNF |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | | 911 Carrera RSR | Richard Leder | Richard Leder | ?th |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | | 911 Carrera RSR | Eugen Kiemele | Eugen Kiemele | ?th |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | | 914/6 | Edgar Dören | Bergischer Motorclub e.V. | ?th |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | | 911 Carrera RS | Fritz Müller | Fritz Müller | ?th |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | | 911 Carrera RSR | Eberhard Sindel | Rallye Gemeinschaft Ulm | DNS |
| 18.5.1975 | Coppa Florio | | 911 Carrera RSR | Carducci / Mirto Randazzo | | DNA |
| 18.5.1975 | Coppa Florio | | 911 Carrera RSR 3.0 | Hezemans / Fitzpatrick | Gelo Racing Team | DNA |
| 18.5.1975 | DARM Salzburgring [T+2.0/GT] | | 914/6 | Alberto Zirkel | | DNF |
| 18.5.1975 | Coppa Florio | | 911 Carrera RSR 3.0 | Restivo / Merendino | | DNA |
| 19.5.1975 | NTK Zandvoort | 64 | 911 Carrera RSR 3.0 | Cees Siewertsen | Florence Hill | 1st |
| 19.5.1975 | NTK Zandvoort | 72 | 911 Carrera RSR | Heinz-Jörgen Dahmen | Porsche Kannacher Krefeld | 2nd |
| 19.5.1975 | NTK Zandvoort | 73 | 911 Carrera RSR | Jürgen Kannacher | Porsche Kannacher Krefeld | DNS |
| 25.5.1975 | Euro GT Zeltweg | 1 | 911 Carrera RSR 3.0 | John Fitzpatrick | Gelo Racing Team | 8th |
| 25.5.1975 | Euro GT Zeltweg | 2 | 911 Carrera RSR | Toine Hezemans | Gelo Racing Team | 10th |
| 25.5.1975 | Euro GT Zeltweg | 3 | 911 Carrera RSR 3.0 | Claude Haldi | Porsche Club Romand | 5th |
| 25.5.1975 | Euro GT Zeltweg | 4 | 911 Carrera RSR 3.0 | Claude Ballot-Léna | Ecurie Robert Buchet | 3rd |
| 25.5.1975 | Euro GT Zeltweg | 5 | 911 Carrera RSR 3.0 | Clemens Schickentanz | Tebernum Porsche Racing Team | 1st |
| 25.5.1975 | Euro GT Zeltweg | 6 | 911 Carrera RSR | Hartwig Bertrams | Tebernum Porsche Racing Team | 4th |
| 25.5.1975 | Euro GT Zeltweg | 10 | 911 Carrera RSR | Bengt Ekberg | Team Västkust Stugan | 6th |
| 25.5.1975 | Euro GT Zeltweg | 11 | 911 Carrera RSR | Eberhard Sindel | Rallyegemeinschaft Ulm | 7th |
| 25.5.1975 | Euro GT Zeltweg | 16 | 911 Carrera RSR 3.0 | Dieter Quester | Porsche-Kremer Racing | 2nd |