| 11.6.1978 | Trans-Am Portland | 02 | 914/6 | Bruce Sanders | Bruce Sanders | 33rd |
| 11.6.1978 | 24 h Le Mans | 5 | 936/78 | Ickx / Pescarolo / Mass | Martini Racing Porsche System | DNF |
| 11.6.1978 | 24 h Le Mans | 6 | 936/78 | Ickx / Wollek / Barth | Martini Racing Porsche System | 2nd |
| 11.6.1978 | 24 h Le Mans | 7 | 936/77 | Haywood / Gregg / Jöst | Martini Racing Porsche System | 3rd |
| 11.6.1978 | Trans-Am Portland | 23 | 914/6 | Bob Zulkowski | Metal Craft Racing | 32nd |
| 11.6.1978 | 24 h Le Mans | 41 | 935 | Gomes / Amaral / Guaraná Menezes | A.S.A. Cachia-Team Pace | 7th |
| 11.6.1978 | 24 h Le Mans | 42 | 935/77A | Konrad / Merl | Konrad Racing | DNA |
| 11.6.1978 | 24 h Le Mans | 43 | 935/78 | Schurti / Stommelen | Martini Racing Porsche System | 8th |
| 11.6.1978 | 24 h Le Mans | 44 | 935/77A | Busby / Knoop / Cord | Porsche Kremer Racing | 6th |
| 11.6.1978 | 24 h Le Mans | 45 | 935 K2 | "Winter" / Schornstein / Gurdjian | Porsche Kremer Racing | NC |
| 11.6.1978 | 24 h Le Mans | 46 | 935/77A | Raymond / "Steve" / Franey | Porsche Kremer Racing | DNF |
| 11.6.1978 | 24 h Le Mans | 47 | 935/77A | Fitzpatrick / Hezemans | Weisberg Gelo Team | DNF |
| 11.6.1978 | 24 h Le Mans | 48 | 935 | Müller / Haldi / "Nico" | Meccarillos Cégécol Racing Team | DNF |
| 11.6.1978 | 24 h Le Mans | 60 | 934 | de Lautour / Bleynie / Ennequin | Meccarillos Cégécol Racing Team | DNQ |
| 11.6.1978 | 24 h Le Mans | 61 | 934 | Chasseuil / Lefebvre | Auto Daniel Urcun | DNF |
| 11.6.1978 | 24 h Le Mans | 62 | 934 | Bussi / "Segolen" / Briavoine | "Ségolen" | 17th |
| 11.6.1978 | 24 h Le Mans | 63 | 911 Carrera RSR 3.0 | Gouttepifre / Touroul / Boubet | Christian Gouttepifre | DNQ |
| 11.6.1978 | 24 h Le Mans | 64 | 911 Carrera RSR | Bourdillat / Bernard / Favresse | Georges Bourdillat | NC |
| 11.6.1978 | 24 h Le Mans | 65 | 930 | Salamin / Vial / Courage / Laplacette | Joël Laplacette | DNF |
| 11.6.1978 | 24 h Le Mans | 66 | 911 Carrera RSR | Verney / Lapeyre / Servanin | Anny-Charlotte Verney | 12th |
| 11.6.1978 | 24 h Le Mans | 68 | 934 | Feitler / Dören / Poulain / Holup | Hervé Poulain | DNF |
| 11.6.1978 | 24 h Le Mans | 69 | 934 | Braillard / Ravenel / Ravenel / Dagoreau | Jean Louis Ravenel-V.S.D. | DNF |
| 11.6.1978 | 24 h Le Mans | 90 | 935/77A | Redman / Paul / Barbour | Dick Barbour Racing | 5th |
| 11.6.1978 | 24 h Le Mans | 91 | 935/77A | Garretson / Akin / Earle | Dick Barbour Racing | DNF |
| 11.6.1978 | 24 h Le Mans | 92 | 934 | | Holly Cars L.S.A. | DNA |
| 11.6.1978 | 24 h Le Mans | 94 | 935/77A | Whittington / Whittington / Konrad | Whittington Brother Inc. Racing | DNF |
| 11.6.1978 | 24 h Le Mans | 97 | 911 Carrera RSR 3.0 | Spice / Rulon-Miller / Perkins | Charles Ivey Engineering | 14th |
| 11.6.1978 | 24 h Le Mans | 98 | 911 Carrera RS | Belliard / Perrier | Thierry Perrier | DNQ |
| 11.6.1978 | DARM Wunstorf | 402 | 934 | Hans Christian Jürgensen | Hans-Christian Jürgensen | 1st |
| 11.6.1978 | DARM Wunstorf | | 911 Carrera RSR 3.0 | Peter Pospieszczyk | Peter Pospieszczyk | 3rd |
| 11.6.1978 | DARM Wunstorf | | | Ingo Sepold | Ingo Sepold | 4th |
| 11.6.1978 | CI Gr.4 Pergusa | | | Di Virgilio | | 2nd |
| 11.6.1978 | DARM Wunstorf | | | Erich Schiebler | Erich Schiebler | 2nd |
| 11.6.1978 | DARM Wunstorf | | 911 Carrera RSR | Fritz Müller | Müller-Bräu-Valvoline-Racing | ?th |
| 11.6.1978 | DARM Wunstorf | | 911 S | Franz Gschwender | Müller-Bräu-Valvoline-Racing | ?th |
| 11.6.1978 | CI Gr.4 Pergusa | | 911 Carrera | Comito | | 10th |
| 11.6.1978 | DARM Wunstorf | | | Willi Schulte | Willi Schulte | ?th |
| 11.6.1978 | DARM Wunstorf | | | Herbert Hechler | Müller-Bräu-Valvoline-Racing | ?th |
| 11.6.1978 | CI Gr.4 Pergusa | | | Amodei | | 14th |
| 11.6.1978 | DARM Wunstorf | | 930 | Hugo Nückel | Hugo Nückel | ?th |
| 11.6.1978 | Gr.5 Pergusa | | 911 Carrera | Pastorello | | 4th |
| 11.6.1978 | Gr.5 Pergusa | | 911 Carrera | Corrado | | 3rd |
| 18.6.1978 | 100 mile Brainerd | 01 | 911 S | Dave White | | 12th |
| 18.6.1978 | 100 mile Brainerd | 07 | 911 Carrera RSR | Dave Cowart | Morrison's Inc. | 8th |
| 18.6.1978 | DRM Mainz-Finthen | 2 | 935/77A | Bob Wollek | Vaillant-Kremer-Team | 1st |
| 18.6.1978 | DRM Mainz-Finthen | 3 | 935/77A | Dieter Schornstein | Porsche-Kremer-Racing-Team | 7th |
| 18.6.1978 | DRM Mainz-Finthen | 4 | 935 K2 | "John Winter" | Porsche-Kremer-Racing-Team | DNF |
| 18.6.1978 | DRM Mainz-Finthen | 5 | 935/77A | Manfred Schurti | Jägermeister-Max-Moritz-Team | 4th |
| 18.6.1978 | DRM Mainz-Finthen | 6 | 935/77A | Toine Hezemans | Weisberg-Gelo-Team | 5th |
| 18.6.1978 | DRM Mainz-Finthen | 8 | 935/77A | John Fitzpatrick | Weisberg-Gelo-Team | 2nd |
| 18.6.1978 | DRM Mainz-Finthen | 9 | 935/77A | Klaus Ludwig | Weisberg-Gelo-Team | 3rd |
| 18.6.1978 | DRM Mainz-Finthen | 10 | 935/77A | Franz Konrad | Konrad-Racing | 6th |
| 18.6.1978 | DRM Mainz-Finthen | 16 | 935 | Volkert Merl | Konrad-Racing | DNF |
| 18.6.1978 | 100 mile Brainerd | 28 | 935 | Clif Kearns | Desperado Racing | 6th |
| 18.6.1978 | DRM Mainz-Finthen | 30 | 911 Carrera RSR | Klaus Böhm | Klaus Böhm | 10th |
| 18.6.1978 | 100 mile Brainerd | 30 | 935 | Gianpiero Moretti | Electrodyne Inc. | 2nd |
| 18.6.1978 | DRM Mainz-Finthen | 31 | 911 Carrera RSR | Peter Schem | Peter Schem | 9th |
| 18.6.1978 | DRM Mainz-Finthen | 32 | 911 Carrera RSR | Georg Freiberger | Georg Freiberger | 11th |
| 18.6.1978 | DRM Mainz-Finthen | 33 | 911 Carrera | Rack | | DNS |
| 18.6.1978 | 100 mile Brainerd | 34 | 911 S | George Drolsom | Drolsom Racing | 20th |
| 18.6.1978 | 100 mile Brainerd | 38 | 911 Carrera RSR | Bonky Fernandez | Boricua Racing | 10th |
| 18.6.1978 | 100 mile Brainerd | 42 | 911 S | Tom Ashby | | 19th |
| 18.6.1978 | 100 mile Brainerd | 52 | 911 Carrera RSR | Tom Tuohy | | 16th |
| 18.6.1978 | 100 mile Brainerd | 55 | 911 Carrera RSR | Howard Meister | | 26th |
| 18.6.1978 | 100 mile Brainerd | 59 | 935/77A | Peter Gregg | Brumos Porsche | 1st |
| 18.6.1978 | 100 mile Brainerd | 62 | 914/6 | Bill Koll | William Koll | 18th |
| 18.6.1978 | 100 mile Brainerd | 64 | 911 S | Dennis Aase | | 28th |
| 18.6.1978 | Benelux Zandvoort | 73 | 935 | Claude Bourgoignie | | DNS |
| 18.6.1978 | Benelux Zandvoort | 74 | 935 | Henri van Oorschot | Henri van Oorschot | 1st |
| 18.6.1978 | Benelux Zandvoort | 75 | 935 | Toon Suykerbuyk | | raced |
| 18.6.1978 | 100 mile Brainerd | 91 | 911 Carrera RSR | Werner Frank | Framm Promotions | 13th |
| 18.6.1978 | 100 mile Brainerd | 93 | 934/5 | Bill Whittington | Whittington Brothers | 5th |
| 18.6.1978 | 100 mile Brainerd | 94 | 935/77A | Don Whittington | Whittington Brothers Racing | 3rd |
| 18.6.1978 | SM Misano | | 911 Carrera RSR 3.0 | Edy Brandenberger | | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 | Armin Jahn | Armin Jahn | 1st |
| 24.6.1978 | DARM Hockenheim | | 911 Carrera RS | Alfred Späh | Autohaus Max-Moritz GmbH | ?th |
| 24.6.1978 | DARM Hockenheim | | 930 | Hugo Nückel | Müllerbräu-Valvoline-Racing | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 Carrera RS | Herbert Hechler | Müllerbräu-Valvoline-Racing | ?th |
| 24.6.1978 | DARM Hockenheim | | 930 | Horst Schmid | Autohaus Max-Moritz GmbH | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 Carrera RS 3.0 | Wolfgang Walter | Wolfgang Walter | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 S | Franz Gschwender | Müllerbräu-Valvoline-Racing | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 Carrera RSR | Fritz Müller | Müllerbräu-Valvoline-Racing | ?th |
| 25.6.1978 | 6 h Misano | 6 | 935/77A | Hezemans / Ludwig / Fitzpatrick | Gelo Racing Team | DNF |
| 25.6.1978 | Trans-Am St. Jovite | 7 | 935 | Ludwig Heimrath | Heimrath Racing | 2nd |
| 25.6.1978 | 6 h Misano | 7 | 935/77A | Wollek / Pescarolo | Porsche Kremer Racing | 1st |
| 25.6.1978 | 6 h Misano | 8 | 935/77A | Fitzpatrick / Heyer | Gelo Racing Team | DNF |
| 25.6.1978 | 6 h Misano | 9 | 935 | Finotto / Facetti / Grano | Jolly Club | DNF |
| 25.6.1978 | 6 h Misano | 11 | 934 | Kristoffersen / Sindel | Preben Kristoffersen | DNF |
| 25.6.1978 | 6 h Misano | 12 | 935/77A | Konrad / Merl | Konrad Racing | 3rd |
| 25.6.1978 | Trans-Am St. Jovite | 15 | 911 S | Fritz Hochreuter | Fritz Hochreuter | 15th |
| 25.6.1978 | 6 h Misano | 18 | 934 | Pallavicini / Kofel / Vanoli | Angelo Pallavicini | 7th |
| 25.6.1978 | 6 h Misano | 23 | 935 | "Victor" / Monticone | "Victor" | 2nd |
| 25.6.1978 | 6 h Misano | 24 | 934 | Leim / Simonsen | Kenneth Leim | DNF |
| 25.6.1978 | 6 h Misano | 25 | 934 | Capra / Gottifredi / di Gioia | Jolly Club | 9th |
| 25.6.1978 | 6 h Misano | 26 | 934 | Schimpf / Dören / Holup | Max Moritz | 8th |
| 25.6.1978 | Trans-Am St. Jovite | 50 | 911 | Victor Larose | Victor Larose | DNS |
| 25.6.1978 | Trans-Am St. Jovite | 57 | 935 | Monte Shelton | Monte's Motors | 1st |
| 25.6.1978 | Trans-Am St. Jovite | 69 | 911 ST | Marc Dancose | Marc Dancose | 21st |
| 25.6.1978 | Trans-Am St. Jovite | 85 | 911 Carrera RSR | Jacques Bienvenue | Jacques Bienvenue | 22nd |
| 25.6.1978 | Trans-Am St. Jovite | 86 | 911 Carrera RSR | Peter Overing | Dicom Corporation | DNS |