| 30.4.1978 | 100 mile Laguna Seca | 0 | 935/77A | Danny Ongais | Interscope Racing | DNS |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 2 | 935/77A | Bob Wollek | Vaillant-Kremer-Team | 4th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 3 | 935/77A | Dieter Schornstein | Porsche-Kremer-Racing | 10th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 4 | 935 K2 | "John Winter" | Porsche-Kremer-Racing | DNF |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 5 | 935/77A | Manfred Schurti | Jägermeister-Max-Moritz-Team | 8th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 6 | 935/77A | Toine Hezemans | Weisberg-Gelo-Team | 1st |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 8 | 935/77A | John Fitzpatrick | Weisberg-Gelo-Team | 2nd |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 9 | 935/77A | Klaus Ludwig | Weisberg-Gelo-Team | 3rd |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 10 | 935/77A | Franz Konrad | Konrad-Racing | 5th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 11 | 935/77A | Reinhold Jöst | Liqui-Moly-Equipe | DNF |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 16 | 935 | Volkert Merl | Konrad-Racing | 6th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 18 | 935 | Klaus Drees | Klaus Drees | 9th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 19 | 935 | Claude Haldi | Meccarillos Racing Team | 7th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 21 | 911 Carrera RS | Karl-Josef Römer | Karl-Josef Römer | 14th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 23 | 911 Carrera RS | Gerhard Happel | Norddeutscher-Automobilclub e. V. | 12th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 24 | 911 Carrera | Hans Großmann | Sports Car Club of Stuttgart e. V. | 16th |
| 30.4.1978 | 100 mile Laguna Seca | 28 | 911 Carrera RSR | Clif Kearns | Desperado Racing | 20th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 28 | 911 Carrera RSR | Matthias Lörper | Norddeutscher-Automobilclub | 17th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 30 | 911 Carrera RSR | Klaus Utz | Hahn Sportwagen GmbH | DNF |
| 30.4.1978 | 100 mile Laguna Seca | 31 | 911 SC | Greg LaCava | | 18th |
| 30.4.1978 | 100 mile Laguna Seca | 93 | 934/5 | Don Whittington | Whittington Brothers | 24th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | | 911 Carrera RSR | Jürgen Konrad | | 11th |
| 7.5.1978 | 100 mile Hallett | 00 | 935/77A | Ted Field | Interscope Racing | 17th |
| 7.5.1978 | Hallett [GTU] | 01 | 911 S | Dave White | | 3rd |
| 7.5.1978 | 100 mile Hallett | 07 | 911 Carrera RSR | Dave Cowart | Morrison's Inc. | 9th |
| 7.5.1978 | 100 mile Hallett | 30 | 935 | Gianpiero Moretti | Electrodyne Inc. | 3rd |
| 7.5.1978 | Hallett [GTU] | 34 | 911 S | George Drolsom | Drolsom Racing | 8th |
| 7.5.1978 | Hallett [GTU] | 42 | 911 S | Tom Ashby | | 9th |
| 7.5.1978 | Hallett [GTU] | 45 | 911 | Gary Steele | | 5th |
| 7.5.1978 | Hallett [GTU] | 51 | 911 S | Dennis Aase | | 1st |
| 7.5.1978 | 100 mile Hallett | 55 | 911 Carrera RSR | Howard Meister | | 6th |
| 7.5.1978 | 100 mile Hallett | 59 | 935/77A | Peter Gregg | Brumos Porsche | 13th |
| 7.5.1978 | Hallett [GTU] | 76 | 911 | Frank Thomas | | 13th |
| 7.5.1978 | Colmar-Berg | 76 | 935 K | John Lagodny | | 1st |
| 7.5.1978 | Hallett [GTU] | 82 | 914/6 | Rodd Harrison | | 4th |
| 7.5.1978 | Hallett [GTU] | 85 | 914/6 | John Hulen | John Hulen | 10th |
| 7.5.1978 | 100 mile Hallett | 91 | 911 Carrera RSR | Werner Frank | Framm Promotions | 7th |
| 7.5.1978 | 100 mile Hallett | 93 | 934/5 | Bill Whittington | Whittington Brothers | 4th |
| 7.5.1978 | 100 mile Hallett | 94 | 935/77A | Don Whittington | Whittington Brothers Racing | 12th |
| 7.5.1978 | Jan Wellem Nürburgring | | 911 Carrera RSR | Georg Freiberger | Georg Freiberger | ?th |
| 7.5.1978 | Jan Wellem Nürburgring | | 911 Carrera | Hans Großmann | Sports Car Club of Stuttgart | ?th |
| 7.5.1978 | Belgium Spa | | 934 | Willy Braillard | | 1st |
| 7.5.1978 | Interserie Colmar-Berg | | 908/3 Turbo | Reinhold Jöst | Liqui Moly Equipe | 1st |
| 7.5.1978 | Interserie Colmar-Berg | | 908/3 Turbo | Bob Wollek | Porsche Kremer Racing | 2nd |
| 14.5.1978 | 6 h Silverstone | 1 | 935/78 | Mass / Ickx | Martini Porsche | 1st |
| 14.5.1978 | 400 km Vallelunga | 1 | 908/3 Turbo | Jöst / Casoni | Liqui Moly Equipe | 1st |
| 14.5.1978 | 6 h Silverstone | 2 | 935/77A | Jöst / Barth | Reinhold Joest | DNA |
| 14.5.1978 | 6 h Silverstone | 4 | 935/77A | Heyer / Bell / Ludwig | Gelo Racing Team | DNF |
| 14.5.1978 | 6 h Silverstone | 5 | 935/77A | Hezemans / Heyer / Fitzpatrick | Gelo Racing Team | 16th |
| 14.5.1978 | 6 h Silverstone | 6 | 935/77A | Fitzpatrick / Hezemans | Gelo Racing Team | DNF |
| 14.5.1978 | 6 h Silverstone | 8 | 935/77A | Wollek / Pescarolo | Porsche Kremer Racing | 2nd |
| 14.5.1978 | 6 h Silverstone | 9 | 935 K2 | Schornstein / "Winter" / Wollek | Porsche Kremer Racing | 5th |
| 14.5.1978 | 6 h Silverstone | 10 | 935 2.0 | Simonsen / Lundgårdh | Team Vastkustugan | 11th |
| 14.5.1978 | 6 h Silverstone | 11 | 935/77A | Konrad / Merl | Konrad Racing | 6th |
| 14.5.1978 | 6 h Silverstone | 12 | 935 | Konrad / Merl | Konrad Racing | DNS |
| 14.5.1978 | 6 h Silverstone | 14 | 935 | Finotto / Facetti | Jolly Club | DNF |
| 14.5.1978 | 6 h Silverstone | 15 | 935 | Haldi / Müller | Meccarillos Racing Team | DNF |
| 14.5.1978 | 6 h Silverstone | 16 | 935 | Lafosse / Leclère | A.S.A. Cachia | DNF |
| 14.5.1978 | 6 h Silverstone | 17 | 935 | Franey / Drees | Klaus Drees | 14th |
| 14.5.1978 | 6 h Silverstone | 22 | 934 | Leim / Lombardi | Kenneth Leim | 15th |
| 14.5.1978 | 6 h Silverstone | 23 | 934 | Dören / Holup | Autohaus Max Moritz | DNF |
| 14.5.1978 | 6 h Silverstone | 24 | 934 | Pallavicini / Bernhard | Pallvano Corse | 8th |
| 14.5.1978 | 6 h Silverstone | 25 | 934 | Sindel / Kristoffersen | Wrangler Racing Team | 7th |
| 14.5.1978 | 6 h Silverstone | 26 | 934 | Carlo Rebai | Jolly Club | DNA |
| 14.5.1978 | 6 h Silverstone | 27 | 934 | Capra / di Gioia | Jolly Club | DNA |
| 14.5.1978 | 6 h Silverstone | 28 | 934 | Guérin / Delaunay | Meccarillos Racing Team | DNF |
| 14.5.1978 | 6 h Silverstone | 31 | 911 Carrera RSR 3.0 | Raymond / Beasley / Phillips | Simon Phillips | 9th |
| 14.5.1978 | 6 h Silverstone | 32 | 911 Carrera RSR 3.0 | Neville / Lovett / Wingrove | Charles Ivey Engineering | 10th |
| 14.5.1978 | 6 h Silverstone | 33 | 911 Carrera RSR 3.0 | Charles Ivey | Charles Ivey Engineering | DNA |
| 14.5.1978 | 6 h Silverstone | 34 | 911 Carrera | Bernard Salam | Bernard Salam | DNA |
| 14.5.1978 | 6 h Silverstone | 35 | 911 Carrera RSR | Bourdillat / Bernard | A.S.A. Cachia | 12th |
| 14.5.1978 | 6 h Silverstone | 61 | 924 | Lovett / Richman | Dick Lovett Specialist Cars | DNQ |
| 14.5.1978 | SM Zeltweg [Gr.6] | | 911 Carrera RSR 3.0 | Edy Brandenberger | | ?th |
| 15.5.1978 | Benelux Zandvoort | 73 | 935 | Claude Bourgoignie | | 1st |
| 15.5.1978 | Benelux Zandvoort | 74 | 935 | Henri van Oorschot | Henri van Oorschot | 2nd |
| 15.5.1978 | Benelux Zandvoort | 75 | 935 | Toon Suykerbuyk | | raced |
| 15.5.1978 | DARM Saarlouis | | 911 Carrera | Hans Großmann | Sports Car Club of Stuttgart | 4th |
| 15.5.1978 | DARM Saarlouis | | 911 SC | Josef Brack | Josef Brack | 5th |
| 15.5.1978 | DARM Saarlouis | | 911 Carrera RSR | Erich Schiebler | Erich Schiebler | 3rd |
| 15.5.1978 | DARM Saarlouis | | 934 | Hans Christian Jürgensen | Hans-Christian Jürgensen | 1st |
| 15.5.1978 | DARM Saarlouis | | 911 Carrera RS | Jürgen Lässig | Autohaus Max-Moritz-GmbH | DQ |
| 15.5.1978 | DARM Saarlouis | | 911 Carrera RS | Markus Pesch | Markus Pesch | ?th |
| 15.5.1978 | DARM Saarlouis | | 911 Carrera RSR | Fritz Müller | Müllerbräu/Valvoline-Racing | ?th |
| 15.5.1978 | DARM Saarlouis | | 930 | Horst Schmid | Autohaus Max-Moritz-GmbH | ?th |
| 15.5.1978 | DARM Saarlouis | | 911 Carrera RS | Klaus Utz | Hahn-Sportwagen-GmbH | DQ |
| 21.5.1978 | DRM Avus | 2 | 935/77A | Bob Wollek | Vaillant-Kremer-Team | 5th |
| 21.5.1978 | DRM Avus | 3 | 935/77A | Dieter Schornstein | Porsche-Kremer-Racing-Team | 7th |
| 21.5.1978 | DRM Avus | 4 | 935 K2 | "John Winter" | Porsche-Kremer-Racing-Team | DNF |
| 21.5.1978 | DRM Avus | 5 | 935/77A | Manfred Schurti | Jägermeister-Max-Moritz-Team | 2nd |
| 21.5.1978 | DRM Avus | 6 | 935/77A | Toine Hezemans | Weisberg-Gelo-Team | 1st |
| 21.5.1978 | DRM Avus | 8 | 935/77A | John Fitzpatrick | Weisberg-Gelo-Team | 3rd |
| 21.5.1978 | DRM Avus | 9 | 935/77A | Klaus Ludwig | Weisberg-Gelo-Team | 4th |
| 21.5.1978 | DRM Avus | 10 | 935/77A | Franz Konrad | Konrad Racing | DNF |
| 21.5.1978 | DRM Avus | 11 | 935/77A | Reinhold Jöst | Liqui-Moly-Equipe | 6th |
| 21.5.1978 | Trans-Am Sears Point | 13 | 935 | Hal Shaw, Jr. | Hal Shaw Racing | 3rd |
| 21.5.1978 | DRM Avus | 16 | 935 | Volkert Merl | Konrad Racing | DNF |
| 21.5.1978 | Trans-Am Sears Point | 24 | 911 Carrera RSR | Tom Frank | Executive Industries | 2nd |
| 21.5.1978 | MEZ Havířov | 35 | 911 Carrera RS | Adam Smorawinski | | DNA |
| 21.5.1978 | Rhein-Ruhr Nürburgring | | | Klaus Busch | Essen-Werdener AC | ?th |
| 21.5.1978 | Rhein-Ruhr Nürburgring | | 911 Carrera RS | Karl-Josef Römer | Karl-Josef Römer | ?th |