| 21.5.1978 | Trans-Am Sears Point | 7 | 935 | Ludwig Heimrath | Heimrath Racing | 19th |
| 21.5.1978 | Trans-Am Sears Point | 16 | 935 | George Follmer | Vasek Polak Racing | 15th |
| 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 |
| 28.5.1978 | 1000 km Nürburgring | 1 | 935/77A | Hezemans / Ludwig / Fitzpatrick | Weisberg-Gelo-Team | DNF |
| 28.5.1978 | 1000 km Nürburgring | 2 | 935/77A | Fitzpatrick / Heyer / Hezemans | Weisberg-Gelo-Team | DNF |
| 28.5.1978 | 1000 km Nürburgring | 3 | 935/77A | Heyer / Ludwig / Hezemans | Weisberg-Gelo-Team | 1st |
| 28.5.1978 | 1000 km Nürburgring | 4 | 935/77A | Wollek / Pescarolo | Porsche-Kremer-Racing | 3rd |
| 28.5.1978 | 1000 km Nürburgring | 5 | 935/77A | Schornstein / "Winter" | Porsche-Kremer-Racing | DNF |
| 28.5.1978 | 1000 km Nürburgring | 7 | 935/77A | Jöst / Barth | Liqui Moly Equipe | 5th |
| 28.5.1978 | 1000 km Nürburgring | 8 | 935/77A | Schurti / Ickx | Jägermeister-Max-Moritz Team | 2nd |
| 28.5.1978 | 1000 km Nürburgring | 9 | 935 RSR | Schimpf / Feitler | Jägermeister-Racing-Team | 11th |
| 28.5.1978 | 1000 km Nürburgring | 10 | 934 | Fischhaber | Jägermeister-Racing-Team | 10th |
| 28.5.1978 | 1000 km Nürburgring | 11 | 935/77A | Schickentanz / Konrad / Merl | Konrad-Racing | 8th |
| 28.5.1978 | 1000 km Nürburgring | 12 | 935 | Merl / Schreiber / Konrad | Konrad-Racing | 4th |
| 28.5.1978 | 1000 km Nürburgring | 14 | 935 | Simonsen / Lundgårdh | Västkuststugan | 16th |
| 28.5.1978 | 1000 km Nürburgring | 16 | 934/5 | Galimberti / Gottifredi / Capra | Jolly Club | DNF |
| 28.5.1978 | 1000 km Nürburgring | 18 | 935 | Müller / Haldi | Meccarillos Racing Team | 36th |
| 28.5.1978 | 1000 km Nürburgring | 19 | 935 | Drees / Hähnlein | Klaus Drees | 17th |
| 28.5.1978 | 1000 km Nürburgring | 40 | 934 | Leim / Köhler / Lombardi | Kenneth Leim | DNF |
| 28.5.1978 | 1000 km Nürburgring | 41 | 934 | Zbinden / Kofel | Scuderia Basilea | 18th |
| 28.5.1978 | 1000 km Nürburgring | 42 | 911 SC | Kammerhuber / Felder / Döring | Weisberg-Gelo-Team | DNS |
| 28.5.1978 | 1000 km Nürburgring | 43 | 911 Carrera RSR | Konrad / Freiberger | Porsche-Kremer-Racing | 15th |
| 28.5.1978 | 1000 km Nürburgring | 44 | 930 | Rieder / Hoier | "Schulz-Gruppe" | DNF |
| 28.5.1978 | 1000 km Nürburgring | 45 | 911 Carrera RS | Duge / Lässig | Autohaus Max Moritz GmbH | 23rd |
| 28.5.1978 | 1000 km Nürburgring | 46 | 934 | Holup / Dören | Jägermeister-Racing-Team | 40th |
| 28.5.1978 | 1000 km Nürburgring | 47 | 934 | Sindel / Kristoffersen | Wrangler-Racing-Team | DNF |
| 28.5.1978 | 1000 km Nürburgring | 48 | 911 Carrera RS | Happel / von Tschirnhaus | Norddeutscher Automobilclub e. V. | 14th |
| 28.5.1978 | 1000 km Nürburgring | 49 | 911 Carrera RSR | Lörper / Oppermann / Beise | Norddeutscher Automobilclub e. V. | 22nd |
| 28.5.1978 | 1000 km Nürburgring | 50 | 911 Carrera RS | Gries / Brune / Dreeser | MSC-Adenau e. V. im ADAC | 25th |
| 28.5.1978 | 1000 km Nürburgring | 52 | 911 Carrera RS 3.0 | Walter / Prinz | Wolfgang Walter | 19th |
| 28.5.1978 | 1000 km Nürburgring | 53 | 934 | Schreiber / Forster | Hans Forster | DNA |
| 28.5.1978 | 1000 km Nürburgring | 54 | 911 Carrera RS | Römer / Jäger | Karl-Josef Römer | 21st |
| 28.5.1978 | 1000 km Nürburgring | 55 | 934 | Pallavicini / Vanoli / Bernhard | Pallvano-Corse | 28th |
| 28.5.1978 | 1000 km Nürburgring | 57 | 911 Carrera RSR | Müller / Hechler | Müllerbräu-Valvoline-Racing | DNF |
| 28.5.1978 | 1000 km Nürburgring | 58 | 911 Carrera RS | Hild / Habermann / Mast | Kurt Hild | 38th |
| 28.5.1978 | 1000 km Nürburgring | 61 | 934 | Haldi / Vial | Meccarillos Racing-Team | DNA |
| 28.5.1978 | 1000 km Nürburgring | 63 | 911 Carrera RS | Utz / Jahn | Hahn Sportwagen GmbH | DNF |
| 28.5.1978 | CI Gr.5 Misano | | 935 | "Victor" | "Victor" | 1st |
| 29.5.1978 | 100 mile Lime Rock | 00 | 935/77A | Ted Field | Interscope Racing | 6th |
| 29.5.1978 | Lime Rock [GTU] | 01 | 911 S | Dave White | | 5th |
| 29.5.1978 | 100 mile Lime Rock | 07 | 911 Carrera RSR | Dave Cowart | Morrison's Inc. | 10th |
| 29.5.1978 | Lime Rock [GTU] | 27 | 911 S | Ray Mummery | | 8th |
| 29.5.1978 | 100 mile Lime Rock | 27 | 911 | Tom Sheehy | | 21st |
| 29.5.1978 | 100 mile Lime Rock | 28 | 935 | Clif Kearns | Desperado Racing | 8th |
| 29.5.1978 | 100 mile Lime Rock | 30 | 935 | Gianpiero Moretti | Electrodyne Inc. | 12th |
| 29.5.1978 | Lime Rock [GTU] | 34 | 911 S | George Drolsom | Drolsom Racing | 9th |
| 29.5.1978 | Lime Rock [GTU] | 42 | 911 S | Tom Ashby | | 12th |
| 29.5.1978 | Lime Rock [GTU] | 50 | 911 S | Fritz Hochreuter | Fritz Hochreuter | 11th |
| 29.5.1978 | Lime Rock [GTU] | 51 | 911 S | Robert Kirby | | 7th |
| 29.5.1978 | 100 mile Lime Rock | 55 | 911 Carrera RSR | Howard Meister | | 11th |
| 29.5.1978 | 100 mile Lime Rock | 59 | 935/77A | Peter Gregg | Brumos Porsche | 1st |
| 29.5.1978 | 100 mile Lime Rock | 60 | 911 | Ren Tilton | | 16th |
| 29.5.1978 | Lime Rock [GTU] | 60 | 911 S | Rusty Bond | | 6th |
| 29.5.1978 | Lime Rock [GTU] | 62 | 914/6 | Bill Koll | William Koll | 4th |
| 29.5.1978 | Lime Rock [GTU] | 64 | 911 S | Dennis Aase | | 2nd |
| 29.5.1978 | Lime Rock [GTU] | 77 | 911 | Pierre Honegger | | 17th |
| 29.5.1978 | 100 mile Lime Rock | 93 | 934/5 | Don Whittington | Whittington Brothers | 4th |
| 29.5.1978 | 100 mile Lime Rock | 94 | 935/77A | Bill Whittington | Whittington Brothers Racing | 2nd |
| 4.6.1978 | Trans-Am Westwood | 02 | 914/6 | Bruce Sanders | Bruce Sanders | DNS |
| 4.6.1978 | Trans-Am Westwood | 7 | 935 | Ludwig Heimrath | Heimrath Racing | 1st |
| 4.6.1978 | Trans-Am Westwood | 13 | 935 | Hal Shaw, Jr. | Hal Shaw Racing | 2nd |
| 4.6.1978 | Trans-Am Westwood | 23 | 914/6 | Bob Zulkowski | Metal Craft Racing | 21st |
| 4.6.1978 | Trans-Am Westwood | 24 | 911 Carrera RSR | Tom Frank | Executive Industries | 20th |
| 4.6.1978 | Trans-Am Westwood | 26 | 911 S | Tom Masterson | Swag Engineering | 14th |
| 4.6.1978 | Trans-Am Westwood | 57 | 935 | Monte Shelton | Monte's Motors | DNS |
| 4.6.1978 | Trans-Am Westwood | 59 | 911 | Nick Feodorhoff | Performance Unlimited | DNS |
| 4.6.1978 | Trans-Am Westwood | 85 | 934/5 | Bruce Leven | Bayside Racing | 7th |
| 4.6.1978 | DARM Zolder | | 911 S | Manfred Anspann | Müllerbräu-Valvoline-Racing | ?th |
| 4.6.1978 | DARM Zolder | | 911 Carrera RS | Herbert Hechler | Müllerbräu-Valvoline-Racing | ?th |
| 4.6.1978 | DARM Zolder | | 930 | Hugo Nückel | Hugo Nückel | ?th |
| 4.6.1978 | Ronde Cévenole | | 911 Carrera | Jacques Alméras | | 3rd |
| 4.6.1978 | DARM Zolder | | 911 Carrera RSR | Erich Schiebler | Erich Schiebler | 1st |
| 4.6.1978 | Ronde Cévenole | | 911 Carrera | M. Enjalbert | | 19th |
| 4.6.1978 | Ronde Cévenole | | 911 Carrera | Henry Sain | | 8th |
| 4.6.1978 | Ronde Cévenole | | 911 Carrera | R. Lescure | | 7th |
| 4.6.1978 | DARM Zolder | | 930 | Horst Schmid | Autohaus Max-Moritz GmbH | ?th |
| 4.6.1978 | DARM Zolder | | 911 Carrera RSR | Fritz Müller | Müllerbräu-Valvoline-Racing | ?th |
| 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 | Wollek / Ickx / 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 | 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 | 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 | 62 | 934 | Bussi / "Segolen" / Briavoine | "Ségolen" | 17th |
| 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 | 90 | 935/77A | Redman / Paul / Barbour | Dick Barbour Racing | 5th |
| 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 | Gr.5 Pergusa | | 911 Carrera | Corrado | | 3rd |
| 11.6.1978 | Gr.5 Pergusa | | 911 Carrera | Pastorello | | 4th |
| 11.6.1978 | CI Gr.4 Pergusa | | 911 Carrera | Comito | | 10th |
| 11.6.1978 | CI Gr.4 Pergusa | | | Amodei | | 14th |