| 30.4.1978 | 100 mile Laguna Seca | 07 | #911 560 9114 | Dave Cowart | Morrison's Inc. | 12th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 21 | | Karl-Josef Römer | Karl-Josef Römer | 14th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 22 | #005 0004 | Georg Freiberger | Porsche-Kremer-Racing | unused |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 23 | #911 460 9019 | Gerhard Happel | Norddeutscher-Automobilclub e. V. | 12th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 24 | | Hans Großmann | Sports Car Club of Stuttgart e. V. | 16th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 26 | #911 460 9018 | Jürgen Lässig | Autohaus Max-Moritz GmbH | DNA |
| 30.4.1978 | 100 mile Laguna Seca | 28 | | Clif Kearns | Desperado Racing | 20th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 28 | | Matthias Lörper | Norddeutscher-Automobilclub | 17th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 30 | | Klaus Utz | Hahn Sportwagen GmbH | DNF |
| 30.4.1978 | DRM Nürburgring Eifelrennen | 31 | | Armin Jahn | Hahn Sportwagen GmbH | DNA |
| 30.4.1978 | 100 mile Laguna Seca | 55 | #911 560 9121 | Howard Meister | | 11th |
| 30.4.1978 | DRM Nürburgring Eifelrennen | | | Jürgen Konrad | | 11th |
| 7.5.1978 | 100 mile Hallett | 07 | #911 560 9114 | Dave Cowart | Morrison's Inc. | 9th |
| 7.5.1978 | 100 mile Hallett | 55 | #911 560 9121 | Howard Meister | | 6th |
| 7.5.1978 | 100 mile Hallett | 91 | | Werner Frank | Framm Promotions | 7th |
| 7.5.1978 | Jan Wellem Nürburgring | | #911 230 0908 | Georg Freiberger | Georg Freiberger | ?th |
| 7.5.1978 | Jan Wellem Nürburgring | | | Hans Großmann | Sports Car Club of Stuttgart | ?th |
| 14.5.1978 | 6 h Silverstone | 31 | #911 460 9075 | Raymond / Beasley / Phillips | Simon Phillips | 9th |
| 14.5.1978 | 6 h Silverstone | 32 | #911 360 1500 | Neville / Lovett / Wingrove | Charles Ivey Engineering | 10th |
| 14.5.1978 | 6 h Silverstone | 33 | #911 460 9064 | Charles Ivey | Charles Ivey Engineering | DNA |
| 14.5.1978 | 6 h Silverstone | 34 | | Bernard Salam | Bernard Salam | DNA |
| 14.5.1978 | 6 h Silverstone | 35 | #911 460 9059 | Bourdillat / Bernard | A.S.A. Cachia | 12th |
| 14.5.1978 | SM Zeltweg | | #911 460 9053 | Edy Brandenberger | | ?th |
| 15.5.1978 | DARM Saarlouis | | | Erich Schiebler | Erich Schiebler | 3rd |
| 15.5.1978 | DARM Saarlouis | | | Markus Pesch | Markus Pesch | ?th |
| 15.5.1978 | DARM Saarlouis | | | Hans Großmann | Sports Car Club of Stuttgart | 4th |
| 15.5.1978 | DARM Saarlouis | | #911 460 9018 | Jürgen Lässig | Autohaus Max-Moritz-GmbH | DQ |
| 15.5.1978 | DARM Saarlouis | | | Fritz Müller | Müllerbräu/Valvoline-Racing | ?th |
| 15.5.1978 | DARM Saarlouis | | | Klaus Utz | Hahn-Sportwagen-GmbH | DQ |
| 21.5.1978 | Trans-Am Sears Point | 24 | #911 460 9056 | Tom Frank | Executive Industries | 2nd |
| 21.5.1978 | MEZ Havířov | 35 | #911 460 9046 | Adam Smorawinski | | DNA |
| 21.5.1978 | Rhein-Ruhr Nürburgring | | | Karl-Josef Römer | Karl-Josef Römer | ?th |
| 28.5.1978 | 1000 km Nürburgring | 43 | #911 230 0908 | Konrad / Freiberger | Porsche-Kremer-Racing | 15th |
| 28.5.1978 | 1000 km Nürburgring | 45 | #911 460 9018 | Duge / Lässig | Autohaus Max Moritz GmbH | 23rd |
| 28.5.1978 | 1000 km Nürburgring | 48 | #911 460 9019 | Happel / von Tschirnhaus | Norddeutscher Automobilclub e. V. | 14th |
| 28.5.1978 | 1000 km Nürburgring | 49 | | Lörper / Oppermann / Beise | Norddeutscher Automobilclub e. V. | 22nd |
| 28.5.1978 | 1000 km Nürburgring | 50 | #002 0024 | Gries / Brune / Dreeser | MSC-Adenau e. V. im ADAC | 25th |
| 28.5.1978 | 1000 km Nürburgring | 52 | #911 360 1249 | Walter / Prinz | Wolfgang Walter | 19th |
| 28.5.1978 | 1000 km Nürburgring | 54 | | Römer / Jäger | Karl-Josef Römer | 21st |
| 28.5.1978 | 1000 km Nürburgring | 57 | | Müller / Hechler | Müllerbräu-Valvoline-Racing | DNF |
| 28.5.1978 | 1000 km Nürburgring | 58 | | Hild / Habermann / Mast | Kurt Hild | 38th |
| 28.5.1978 | 1000 km Nürburgring | 63 | | Utz / Jahn | Hahn Sportwagen GmbH | DNF |
| 29.5.1978 | 100 mile Lime Rock | 07 | #911 560 9114 | Dave Cowart | Morrison's Inc. | 10th |
| 29.5.1978 | 100 mile Lime Rock | 55 | #911 560 9121 | Howard Meister | | 11th |
| 4.6.1978 | Trans-Am Westwood | 24 | #911 460 9056 | Tom Frank | Executive Industries | 20th |
| 4.6.1978 | Ronde Cévenole | | | R. Lescure | | 7th |
| 4.6.1978 | Ronde Cévenole | | | Jacques Alméras | | 3rd |
| 4.6.1978 | Ronde Cévenole | | | Henry Sain | | 8th |
| 4.6.1978 | Ronde Cévenole | | | M. Enjalbert | | 19th |
| 4.6.1978 | DARM Zolder | | | Herbert Hechler | Müllerbräu-Valvoline-Racing | ?th |
| 4.6.1978 | DARM Zolder | | | Fritz Müller | Müllerbräu-Valvoline-Racing | ?th |
| 4.6.1978 | DARM Zolder | | | Erich Schiebler | Erich Schiebler | 1st |
| 11.6.1978 | Trans-Am Portland | 24 | #911 460 9056 | Tom Frank | Executive Industries | 9th |
| 11.6.1978 | Trans-Am Portland | 47 | #911 460 0059 | Bill Hanel | Hanel Racing | 3rd |
| 11.6.1978 | 24 h Le Mans | 63 | #911 460 9070 | Gouttepifre / Touroul / Boubet | Christian Gouttepifre | DNQ |
| 11.6.1978 | 24 h Le Mans | 64 | #911 360 0643 | Bourdillat / Bernard / Favresse | Georges Bourdillat | NC |
| 11.6.1978 | 24 h Le Mans | 66 | #911 350 1121? | Verney / Lapeyre / Servanin | Anny-Charlotte Verney | 12th |
| 11.6.1978 | 24 h Le Mans | 97 | #911 460 9064 | Spice / Rulon-Miller / Perkins | Charles Ivey Engineering | 14th |
| 11.6.1978 | 24 h Le Mans | 98 | | Belliard / Perrier | Thierry Perrier | DNQ |
| 11.6.1978 | Gr.5 Pergusa | | | Pastorello | | 4th |
| 11.6.1978 | Gr.5 Pergusa | | | Corrado | | 3rd |
| 11.6.1978 | CI Gr.4 Pergusa | | | Comito | | 10th |
| 11.6.1978 | DARM Wunstorf | | | Fritz Müller | Müller-Bräu-Valvoline-Racing | ?th |
| 11.6.1978 | DARM Wunstorf | | #005 0005 | Peter Pospieszczyk | Peter Pospieszczyk | 3rd |
| 18.6.1978 | 100 mile Brainerd | 07 | #911 560 9114 | Dave Cowart | Morrison's Inc. | 8th |
| 18.6.1978 | DRM Mainz-Finthen | 30 | #911 360 1164 | Klaus Böhm | Klaus Böhm | 10th |
| 18.6.1978 | DRM Mainz-Finthen | 31 | | Peter Schem | Peter Schem | 9th |
| 18.6.1978 | DRM Mainz-Finthen | 32 | #911 230 0908 | Georg Freiberger | Georg Freiberger | 11th |
| 18.6.1978 | DRM Mainz-Finthen | 33 | | Rack | | DNS |
| 18.6.1978 | 100 mile Brainerd | 38 | #911 460 9113 | Bonky Fernandez | Boricua Racing | 10th |
| 18.6.1978 | 100 mile Brainerd | 52 | | Tom Tuohy | | 16th |
| 18.6.1978 | 100 mile Brainerd | 55 | #911 560 9121 | Howard Meister | | 26th |
| 18.6.1978 | 100 mile Brainerd | 91 | | Werner Frank | Framm Promotions | 13th |
| 18.6.1978 | SM Misano | | #911 460 9053 | Edy Brandenberger | | ?th |
| 24.6.1978 | DARM Hockenheim | | | Alfred Späh | Autohaus Max-Moritz GmbH | ?th |
| 24.6.1978 | DARM Hockenheim | | | Fritz Müller | Müllerbräu-Valvoline-Racing | ?th |
| 24.6.1978 | DARM Hockenheim | | | Herbert Hechler | Müllerbräu-Valvoline-Racing | ?th |
| 24.6.1978 | DARM Hockenheim | | #911 360 1249 | Wolfgang Walter | Wolfgang Walter | ?th |
| 25.6.1978 | Trans-Am St. Jovite | 11 | | Hans Berner | Willie Goebbels | 9th |
| 25.6.1978 | Trans-Am St. Jovite | 24 | #911 460 9056 | Tom Frank | Executive Industries | 4th |
| 25.6.1978 | Trans-Am St. Jovite | 85 | | Jacques Bienvenue | Jacques Bienvenue | 22nd |
| 25.6.1978 | Trans-Am St. Jovite | 86 | | Peter Overing | Dicom Corporation | DNS |
| 25.6.1978 | Trans-Am St. Jovite | 94 | | Klaus Bytzek | Bytzek Automotive | 7th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 07 | #911 560 9114 | Cowart / Mendez | Morrison's Inc. | 40th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 6 | #005 0009 | Luis Mendez | Luiz Mendez | 32nd |
| 4.7.1978 | 250 mile Daytona Paul Revere | 8 | #911 460 0035 | Bob Beasley | Bob Beasley | 42nd |
| 4.7.1978 | 250 mile Daytona Paul Revere | 32 | | Espinosa / Lopez / Londono | Botero Racing | 44th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 38 | #911 460 9113 | Fernandez / Bohren | Boricua Racing | 7th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 46 | #911 360 0915 | Mauricio DeNarvaez | Mauricio De Narvaez | 5th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 58 | #911 460 9054 | Diego Febles | | 6th |
| 8.7.1978 | 6 h Watkins Glen | 22 | #911 360 0756 | Stephens | Jeffrey Stephens | 30th |
| 8.7.1978 | 6 h Watkins Glen | 24 | #911 460 9056 | Frank / Leven | Executive Industries | 28th |
| 8.7.1978 | 6 h Watkins Glen | 32 | #911 460 9048 | Griswold / Akin | Earle & Akin Racing Assoc. | 10th |
| 8.7.1978 | 6 h Watkins Glen | 39 | | Bytzek / Bartling | Bytzek Automotive | DNA |
| 8.7.1978 | 6 h Watkins Glen | 50 | | Bienvenue / Talbot | Jacques Bienvenue | DNA |
| 8.7.1978 | 6 h Watkins Glen | 57 | #911 560 9122 | Frostrom / Wood | Robert Frostrom Racing | DNS |
| 8.7.1978 | 6 h Watkins Glen | 62 | | Thomas | Lancer | 43rd |
| 8.7.1978 | 6 h Watkins Glen | 75 | | Ridgely / Cook | Norman Ridgely | DNS |
| 8.7.1978 | 6 h Watkins Glen | 79 | #004 0002 | Callas / Papke | Rennsport Porsche Works | 16th |
| 8.7.1978 | 6 h Watkins Glen | 97 | | Frank / Schramm | Framm Promotions | 9th |