| 2.4.1978 | 6 h Talladega | 13 | 935 | Spalding / Shaw, Jr. | Hal Shaw Racing | 23rd |
| 2.4.1978 | National Montlhéry [Gr.4/Gr.5/Gr.6] | 31 | 911 Carrera | Roland Ennequin | | DNA |
| 2.4.1978 | National Montlhéry [Gr.4/Gr.5/Gr.6] | 33 | | Daniel Bigaré | | DNA |
| 2.4.1978 | National Montlhéry [Gr.4/Gr.5/Gr.6] | 35 | 911 Carrera | Jacques Guérin | | DNA |
| 2.4.1978 | 6 h Talladega | 36 | 911 | Panaccione / Case | Ron Case | 22nd |
| 2.4.1978 | National Montlhéry [Gr.4/Gr.5/Gr.6] | 37 | 911 Carrera | Pierre Herbland-Morin | | DNA |
| 2.4.1978 | 6 h Talladega | 45 | 911 | Gaeta / Steele | Vann's Auto Body | 28th |
| 2.4.1978 | National Montlhéry [Gr.4/Gr.5/Gr.6] | 51 | 934 | Christian Bussi | | DNA |
| 2.4.1978 | National Montlhéry [Gr.4/Gr.5/Gr.6] | 53 | 911 Carrera RSR | Georges Bourdillat | | DNA |
| 2.4.1978 | 6 h Talladega | 60 | 911 S | Bond / Tilton | R & R Racing | 29th |
| 2.4.1978 | Marlboro Cup Zolder | 73 | 935 | Claude Bourgoignie | | 1st |
| 2.4.1978 | Marlboro Cup Zolder | 74 | 935 | Henri van Oorschot | Henri van Oorschot | 2nd |
| 2.4.1978 | Marlboro Cup Zolder | 75 | 935 | Toon Suykerbuyk | | 3rd |
| 2.4.1978 | Marlboro Cup Zolder | 76 | 935 K | John Lagodny | | 4th |
| 2.4.1978 | Marlboro Cup Zolder | 77 | 911 Carrera RSR | Pit Weirig | | DNA |
| 2.4.1978 | Marlboro Cup Zolder | 91 | 911 Carrera RS | "Alex" | | DNA |
| 16.4.1978 | 100 mile Road Atlanta | 0 | 935/77A | Danny Ongais | Interscope Racing | 2nd |
| 16.4.1978 | 100 mile Road Atlanta | 00 | 935/77A | Ted Field | Interscope Racing | 6th |
| 16.4.1978 | Road Atlanta [GTU] | 01 | 911 S | Dave White | Roehrig Racing | 1st |
| 16.4.1978 | 100 mile Road Atlanta | 07 | 911 Carrera RSR | Dave Cowart | Morrison's Inc. | 13th |
| 16.4.1978 | 6 h Dijon | 2 | 935/77A | Wollek / Pescarolo | Porsche Kremer Racing | 1st |
| 16.4.1978 | 6 h Dijon | 3 | 935/77A | Schornstein / "Winter" | Porsche Kremer Racing | 6th |
| 16.4.1978 | 6 h Dijon | 4 | 935 | Haldi / Müller | Meccarillos Racing Team | DNF |
| 16.4.1978 | Road Atlanta [GTU] | 4 | 911 S | Chiqui Soldevilla | - | 6th |
| 16.4.1978 | 6 h Dijon | 5 | 935/77A | Fitzpatrick / Heyer / Hezemans | Gelo Racing Team | 2nd |
| 16.4.1978 | 6 h Dijon | 6 | 935/77A | Hezemans / Ludwig | Gelo Racing Team | DNF |
| 16.4.1978 | 100 mile Road Atlanta | 8 | 911 Carrera RSR | Bob Beasley | Bob Beasley | 16th |
| 16.4.1978 | 6 h Dijon | 8 | 935/77A | Konrad / Merl | Konrad Racing | DNF |
| 16.4.1978 | 6 h Dijon | 9 | 935 | Lafosse / Ballot-Léna | ASA Cachia | 5th |
| 16.4.1978 | 6 h Dijon | 11 | 935 | Casoni / Mallet | Carlo Noce | DNF |
| 16.4.1978 | 6 h Dijon | 12 | 935 | Kauwertz / Drees / Hähnlein | Klaus Drees | 10th |
| 16.4.1978 | Road Atlanta [GTU] | 27 | 911 S | Ray Mummery | Miami Auto Racing | 5th |
| 16.4.1978 | 100 mile Road Atlanta | 28 | 935 | Clif Kearns | Desperado Racing Inc. | 30th |
| 16.4.1978 | 6 h Dijon | 30 | 930 | Vial / Salamin | Heinz Schiller | 14th |
| 16.4.1978 | 100 mile Road Atlanta | 30 | 935 | Gianpiero Moretti | Electrodyne Inc. | 4th |
| 16.4.1978 | 6 h Dijon | 31 | 934 | Pallavicini / Calderari / Bernhard | Meccarillos Racing Team | 8th |
| 16.4.1978 | 6 h Dijon | 32 | 934 | Sindel / Kristoffersen | Preben Kristoffersen | DNF |
| 16.4.1978 | 100 mile Road Atlanta | 33 | 911 Carrera RSR | Bonky Fernandez | Boricua Racing | 15th |
| 16.4.1978 | 6 h Dijon | 33 | 934 | Zbinden | Scuderia Basilea | DNS |
| 16.4.1978 | 6 h Dijon | 34 | 911 Carrera RSR | Bourdillat / Bernard | ASA Cachia | 12th |
| 16.4.1978 | Road Atlanta [GTU] | 34 | 911 S | George Drolsom | Drolsom Racing | 7th |
| 16.4.1978 | Road Atlanta [GTU] | 36 | 911 | Ron Case | Case Racing | 12th |
| 16.4.1978 | 6 h Dijon | 36 | 934 | Simonsen / Leim | Kenneth Leim | 9th |
| 16.4.1978 | 6 h Dijon | 37 | 911 Carrera RSR | Verney / Striebig | Anny-Charlotte Verney | 15th |
| 16.4.1978 | 6 h Dijon | 38 | 934 | Dören / Holup | Max Moritz | 16th |
| 16.4.1978 | 6 h Dijon | 39 | 934 | Bussi / "Segolen" / Salam | Christian Bussi | 11th |
| 16.4.1978 | Road Atlanta [GTU] | 42 | 911 S | Tom Ashby | - | 10th |
| 16.4.1978 | Road Atlanta [GTU] | 45 | 911 | Gary Steele | - | 11th |
| 16.4.1978 | 100 mile Road Atlanta | 46 | 911 Carrera RSR | Mauricio de Narváez | Mauricio DeNarvaez | 39th |
| 16.4.1978 | 100 mile Road Atlanta | 51 | 911 Carrera RSR 3.0 | Robert Frostrom | Robert Frostrom | 34th |
| 16.4.1978 | 100 mile Road Atlanta | 59 | 935 | Peter Gregg | Brumos Porsche Audi | 1st |
| 16.4.1978 | 100 mile Road Atlanta | 60 | 911 Carrera RSR | Luis Mendez | Mendez Racing | 17th |
| 16.4.1978 | Road Atlanta [GTU] | 60 | 911 S | Rusty Bond | - | 14th |
| 16.4.1978 | Road Atlanta [GTU] | 64 | 911 S | Dennis Aase | Dennis Aase | 2nd |
| 16.4.1978 | Benelux Zandvoort | 73 | 935 | Claude Bourgoignie | | raced |
| 16.4.1978 | Benelux Zandvoort | 74 | 935 | Henri van Oorschot | Henri van Oorschot | 1st |
| 16.4.1978 | Benelux Zandvoort | 75 | 935 | Toon Suykerbuyk | | 2nd |
| 16.4.1978 | Road Atlanta [GTU] | 76 | 911 | Frank Thomas | Quality Inn | 4th |
| 16.4.1978 | 100 mile Road Atlanta | 91 | 911 Carrera RSR | Werner Frank | Framm Promotions | 19th |
| 16.4.1978 | 100 mile Road Atlanta | 93 | 934/5 | Bill Whittington | Whittington Brothers | 24th |
| 16.4.1978 | 100 mile Road Atlanta | 94 | 935/77A | Don Whittington | Whittington Bros. | 7th |
| 16.4.1978 | 100 mile Road Atlanta | 95 | 935 | Hurley Haywood | Bob Hagestad | 23rd |
| 16.4.1978 | Fassberg | 140 | 934 | Hans Christian Jürgensen | | 1st |
| 16.4.1978 | SM Monza | | 911 Carrera RSR 3.0 | Edy Brandenberger | | ?th |
| 16.4.1978 | DARM Hockenheim | | 911 Carrera | Hans Großmann | Sports Car Club of Stuttgart | 3rd |
| 16.4.1978 | DARM Hockenheim | | 911 Carrera | Karl-Josef Römer | Karl-J. Römer | ?th |
| 16.4.1978 | SM Monza | | 911 Carrera | Athos Severi | | ?th |
| 16.4.1978 | DARM Hockenheim | | 911 Carrera RSR | Fritz Müller | Fritz Müller | ?th |
| 16.4.1978 | DARM Hockenheim | | 911 Carrera | Klaus Utz | Klaus Utz | ?th |
| 16.4.1978 | DARM Hockenheim | | 911 Carrera RS | Jürgen Lässig | Autohaus Max Moritz GmbH | ?th |
| 16.4.1978 | DARM Hockenheim | | 911 Carrera | Erich Schiebler | Erich Schiebler | 1st |
| 16.4.1978 | DARM Hockenheim | | 911 Carrera RS | Richard Weber | R. Weber | 4th |
| 22.4.1978 | Giro dell'Umbria | | | di Gioia | | ?th |
| 23.4.1978 | 320 km Monza | 3 | 908/3 Turbo | Reinhold Jöst | Liqui Moly Equipe | 1st |
| 23.4.1978 | GP Zolder | 72 | 934 | Willy Braillard | Jean Pierre Gaban | 1st |
| 23.4.1978 | GP Zolder | 73 | 935 | Claude Bourgoignie | Team Willeme | raced |
| 23.4.1978 | GP Zolder | 74 | 935 | Henri van Oorschot | Scorpio Racing | raced |
| 23.4.1978 | GP Zolder | 75 | 935 | Toon Suykerbuyk | Scorpio Racing | raced |
| 23.4.1978 | GP Zolder | 76 | 935 K | John Lagodny | Screen-Center | 2nd |
| 23.4.1978 | GP Zolder | 77 | 911 Carrera RSR | Pit Weirig | Screen-Center | DNA |
| 23.4.1978 | GP Zolder | 91 | 911 Carrera RS | "Alex" | Excelsior Rombouts Rizla | DNA |
| 23.4.1978 | SM Dijon [Gr.4/Gr.5] | | 934 | Enzo Calderari | | 2nd |
| 23.4.1978 | SM Dijon [Gr.4/Gr.5] | | 911 Carrera RSR | Marco Vanoli | | 4th |
| 23.4.1978 | SM Dijon [Gr.4/Gr.5] | | 911 Carrera RSR 3.0 | Edy Brandenberger | | 1st |
| 23.4.1978 | SM Dijon [Gr.4/Gr.5] | | 911 Carrera | Sarteur | | 7th |
| 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 | 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 | 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 | DRM Nürburgring Eifelrennen | 28 | 911 Carrera RSR | Matthias Lörper | Norddeutscher-Automobilclub | 17th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | | 911 Carrera RSR | Jürgen Konrad | | 11th |