| 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 | 100 mile Brainerd | 28 | 935 | Clif Kearns | Desperado Racing | 6th |
| 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 | 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 | SM Misano | | 911 Carrera RSR 3.0 | Edy Brandenberger | | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 Carrera RS | Alfred Späh | Autohaus Max-Moritz GmbH | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 S | Franz Gschwender | Müllerbräu-Valvoline-Racing | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 Carrera RS 3.0 | Wolfgang Walter | Wolfgang Walter | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 Carrera RS | Herbert Hechler | Müllerbräu-Valvoline-Racing | ?th |
| 24.6.1978 | DARM Hockenheim | | 911 | Armin Jahn | Armin Jahn | 1st |
| 24.6.1978 | DARM Hockenheim | | 930 | Horst Schmid | Autohaus Max-Moritz GmbH | ?th |
| 24.6.1978 | DARM Hockenheim | | 930 | Hugo Nückel | 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 | Trans-Am St. Jovite | 11 | 911 Carrera RSR | Hans Berner | Willie Goebbels | 9th |
| 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 | Trans-Am St. Jovite | 24 | 911 Carrera RSR | Tom Frank | Executive Industries | 4th |
| 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 |
| 25.6.1978 | Trans-Am St. Jovite | 94 | 911 Carrera RSR | Klaus Bytzek | Bytzek Automotive | 7th |
| 2.7.1978 | DRM Zandvoort | 2 | 935/77A | Bob Wollek | Vaillant Kremer Team | 9th |
| 2.7.1978 | DRM Zandvoort | 3 | 935/77A | Dieter Schornstein | Porsche Kremer Racing | 11th |
| 2.7.1978 | DRM Zandvoort | 4 | 935/77A | "John Winter" | Minolta Kremer Team | DNS |
| 2.7.1978 | DRM Zandvoort | 5 | 935/77A | Manfred Schurti | Jägermeister Max Moritz Team | 13th |
| 2.7.1978 | DRM Zandvoort | 6 | 935/77A | Toine Hezemans | Weisberg-Gelo-Team | 2nd |
| 2.7.1978 | DRM Zandvoort | 8 | 935/77A | John Fitzpatrick | Weisberg-Gelo-Team | 1st |
| 2.7.1978 | DRM Zandvoort | 9 | 935/77A | Klaus Ludwig | Weisberg-Gelo-Team | 3rd |
| 2.7.1978 | DRM Zandvoort | 10 | 935/77A | Franz Konrad | Konrad Racing | DNS |
| 2.7.1978 | DRM Zandvoort | 16 | 935 | Volkert Merl | Konrad Racing | 5th |
| 2.7.1978 | DRM Zandvoort | 31 | 935 | Henri van Oorschot | Henri van Oorschot | 12th |
| 2.7.1978 | DRM Zandvoort | 32 | 935 | Toon Suykerbuyk | | 7th |
| 2.7.1978 | DRM Zandvoort | 33 | 935 | Claude Bourgoignie | | 4th |
| 2.7.1978 | DRM Zandvoort | | 934 | Hans Christian Jürgensen | | DNS |
| 2.7.1978 | DRM Zandvoort | | 930 | Hans Großmann | | 8th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 0 | 935/77A | Field / Ongais | Interscope Racing | DNS |
| 4.7.1978 | 250 mile Daytona Paul Revere | 00 | 935/77A | Field / Ongais | Interscope Racing | 36th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 01 | 911 S | Dave White | | 8th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 02 | 911 S | Roehrig / Roehrig | | 18th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 07 | 911 Carrera RSR | Cowart / Mendez | Morrison's Inc. | 40th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 4 | 911 S | Chiqui Soldevilla | | 35th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 6 | 911 Carrera RSR | Luis Mendez | Luiz Mendez | 32nd |
| 4.7.1978 | 250 mile Daytona Paul Revere | 8 | 911 Carrera RSR | Bob Beasley | Bob Beasley | 42nd |
| 4.7.1978 | 250 mile Daytona Paul Revere | 9 | 935 | Hinze / Yarosh | | 52nd |
| 4.7.1978 | 250 mile Daytona Paul Revere | 23 | 911 | Snow / Swanson / Cripe | | 49th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 28 | 935 | Kearns / Minter | Desperado Racing | 2nd |
| 4.7.1978 | 250 mile Daytona Paul Revere | 30 | 935 | Gianpiero Moretti | Electrodyne Inc. | 48th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 32 | 911 Carrera RSR | Espinosa / Lopez / Londono | Botero Racing | 44th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 34 | 911 S | Drolsom / Davenport | Drolsom Racing | 26th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 36 | 911 | Case / Panaccione | Case Racing | 20th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 38 | 911 Carrera RSR | Fernandez / Bohren | Boricua Racing | 7th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 42 | 911 S | Ashby / Bean | Tom Ashby | 10th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 46 | 911 Carrera RSR | Mauricio de Narváez | Mauricio De Narvaez | 5th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 50 | 911 S | Hochreuter / Brezinka | | 24th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 58 | 911 Carrera RSR | Diego Febles | | 6th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 59 | 935/77A | Peter Gregg | Brumos Porsche | 1st |
| 4.7.1978 | 250 mile Daytona Paul Revere | 60 | 911 S | Bond / Tilton | | 17th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 62 | 914/6 | Bill Koll | William Koll | 22nd |
| 4.7.1978 | 250 mile Daytona Paul Revere | 85 | 914/6 | Hulen / Coupland | John Hulen | 28th |
| 4.7.1978 | 250 mile Daytona Paul Revere | 88 | 911 S | Hamilton / Wade | Hamilton House Racing | 21st |
| 4.7.1978 | 250 mile Daytona Paul Revere | 93 | 934/5 | Whittington / Whittington | Whittington Brothers | 3rd |
| 8.7.1978 | 6 h Watkins Glen | 0 | 935/77A | Ongais / Field | Interscope Racing | 25th |
| 8.7.1978 | 6 h Watkins Glen | 08 | 935/77A | Haywood / Paul | JLP Racing | DNS |
| 8.7.1978 | 6 h Watkins Glen | 1 | 935 | Ickx / Follmer | Vasek Polak Racing | 26th |
| 8.7.1978 | 6 h Watkins Glen | 3 | 935 | Guthrie / Redman / Haywood | Vasek Polak Racing | 8th |
| 8.7.1978 | 6 h Watkins Glen | 13 | 935 | Shaw, Jr. / Shelton | Hal Shaw Racing | 4th |
| 8.7.1978 | 6 h Watkins Glen | 24 | 911 Carrera RSR | Frank / Leven | Executive Industries | 28th |
| 8.7.1978 | 6 h Watkins Glen | 30 | 935/77A | Hezemans / Fitzpatrick / Gregg | GeLo Racing | 1st |
| 8.7.1978 | 6 h Watkins Glen | 32 | 911 Carrera RSR | Griswold / Akin | Earle & Akin Racing Assoc. | 10th |
| 8.7.1978 | 6 h Watkins Glen | 62 | 911 Carrera RSR | Thomas | Lancer | 43rd |
| 8.7.1978 | 6 h Watkins Glen | 71 | 935 | Thomas / Chandler | Otis Chandler | 6th |
| 8.7.1978 | 6 h Watkins Glen | 77 | 911 S | Jennings / O'Steen | Bruce Jennings | 13th |
| 8.7.1978 | 6 h Watkins Glen | 79 | 911 Carrera RSR 3.0 | Callas / Papke | Rennsport Porsche Works | 16th |
| 8.7.1978 | 6 h Watkins Glen | 90 | 935/77A | Stommelen / Schurti / Barbour | Dick Barbour Performance | 2nd |
| 8.7.1978 | 6 h Watkins Glen | 94 | 935/77A | Whittington / Whittington | Whittington Borthers | 22nd |
| 8.7.1978 | 6 h Watkins Glen | 97 | 911 Carrera RSR | Frank / Schramm | Framm Promotions | 9th |