| 2.7.1978 | DRM Zandvoort | 5 | 935/77A | Manfred Schurti | Jägermeister Max Moritz Team | 13th |
| 2.7.1978 | DRM Zandvoort | 10 | 935/77A | Franz Konrad | Konrad Racing | DNS |
| 2.7.1978 | DRM Zandvoort | | 934 | Hans Christian Jürgensen | | DNS |
| 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 | 00 | 935/77A | Ongais / Field | Interscope Racing | DNA |
| 8.7.1978 | 6 h Watkins Glen | 08 | 935/77A | Haywood / Paul | JLP Racing | DNS |
| 8.7.1978 | 6 h Watkins Glen | 1 | 935 | Follmer / Ickx | 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 | 4 | 935 | Haywood / Gunn | Vasek Polak Racing | 33rd |
| 8.7.1978 | 6 h Watkins Glen | 7 | 935 | Heimrath / Miller | Heimrath Racing | 15th |
| 8.7.1978 | 6 h Watkins Glen | 13 | 935 | Shaw, Jr. / Shelton | Hal Shaw Racing | 4th |
| 8.7.1978 | 6 h Watkins Glen | 17 | 934 | Pallavicini / Calderari | Pallvano Corse | 18th |
| 8.7.1978 | 6 h Watkins Glen | 22 | 911 Carrera RSR | Stephens | Jeffrey Stephens | 30th |
| 8.7.1978 | 6 h Watkins Glen | 24 | 911 Carrera RSR | Frank / Leven | Executive Industries | 28th |
| 8.7.1978 | 6 h Watkins Glen | 28 | 935 | Minter / Kearns | Desperado Racing | DNA |
| 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 | 39 | 911 Carrera RSR | Bytzek / Bartling | Bytzek Automotive | DNA |
| 8.7.1978 | 6 h Watkins Glen | 50 | 911 Carrera RSR | Bienvenue / Talbot | Jacques Bienvenue | DNA |
| 8.7.1978 | 6 h Watkins Glen | 52 | 914/6 | Slodowick / McCandless | McCandless Automotive | DNQ |
| 8.7.1978 | 6 h Watkins Glen | 57 | 911 Carrera RSR 3.0 | Frostrom / Wood | Robert Frostrom Racing | DNS |
| 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 | 74 | 911 S | Scott | Z & W Enterprises | 39th |
| 8.7.1978 | 6 h Watkins Glen | 75 | 911 Carrera RSR | Ridgely / Cook | Norman Ridgely | DNS |
| 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 | 88 | 911 S | Hamilton / Collins / Wade | Hamilton House Racing | 34th |
| 8.7.1978 | 6 h Watkins Glen | 90 | 935/77A | Stommelen / Schurti / Barbour | Dick Barbour Performance | 2nd |
| 8.7.1978 | 6 h Watkins Glen | 93 | 934/5 | | Whittington Borthers | unused |
| 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 |
| 9.7.1978 | Nivelles | 70 | 934 | Raymond Raus | | 3rd |
| 9.7.1978 | Nivelles | 73 | 935 | Claude Bourgoignie | | 1st |
| 9.7.1978 | Colmar-Berg | 76 | 935 K | John Lagodny | | 1st |
| 9.7.1978 | Nivelles | | 934 | Marc Duez | | 2nd |
| 16.7.1978 | DRM Kassel-Calden | 2 | 935/77A | Bob Wollek | Vaillant Kremer Team | 1st |
| 16.7.1978 | DRM Kassel-Calden | 3 | 935/77A | Dieter Schornstein | Porsche Kremer Racing | 9th |
| 16.7.1978 | DRM Kassel-Calden | 4 | 935/77A | "John Winter" | Minolta Kremer Team | 8th |
| 16.7.1978 | DRM Kassel-Calden | 5 | 935/77A | Manfred Schurti | Jägermeister Max Moritz Team | 5th |
| 16.7.1978 | DRM Kassel-Calden | 6 | 935/77A | Toine Hezemans | Weisberg-Gelo-Team | 2nd |
| 16.7.1978 | DRM Kassel-Calden | 8 | 935/77A | John Fitzpatrick | Weisberg-Gelo-Team | 3rd |
| 16.7.1978 | DRM Kassel-Calden | 9 | 935/77A | Klaus Ludwig | Weisberg-Gelo-Team | 4th |
| 16.7.1978 | DRM Kassel-Calden | 11 | 935/77A | Reinhold Jöst | Liqui Moly Equipe | 6th |
| 16.7.1978 | DRM Kassel-Calden | 16 | 935/77A | Volkert Merl | Konrad Racing | 7th |
| 16.7.1978 | DRM Kassel-Calden | 25 | 934 | Hans Christian Jürgensen | Hans Christian Jürgensen | 10th |
| 16.7.1978 | DRM Kassel-Calden | 27 | 934 | "Harry Hirsch" | | DNF |
| 16.7.1978 | Interserie Kassel-Calden | | 908/3 Turbo | Reinhold Jöst | Liqui Moly Equipe | 2nd |
| 16.7.1978 | Interserie Kassel-Calden | | 908/3 Turbo | Bob Wollek | Porsche Kremer Racing | 1st |
| 16.7.1978 | SM Hockenheim | | 911 Carrera RSR 3.0 | Edy Brandenberger | | ?th |
| 16.7.1978 | SM Hockenheim | | 934 | Edi Kofel | | ?th |
| 16.7.1978 | DRM Kassel-Calden | | 934 | Hans Großmann | | 12th |
| 16.7.1978 | DRM Kassel-Calden | | 911 Carrera RSR | Klaus Utz | | 11th |
| 20.7.1978 | Colmar-Berg | 76 | 935 K | John Lagodny | | 1st |
| 23.7.1978 | Diepholz | 220 | 934 | Hans Christian Jürgensen | Hans Christian Jürgensen | 1st |
| 23.7.1978 | Diepholz | | 911 Carrera RSR 3.0 | Peter Pospieszczyk | Peter Pospieszczyk | ?th |
| 29.7.1978 | DRM Hockenheim GP | 2 | 935/77A | Bob Wollek | Vaillant Kremer Team | 6th |
| 29.7.1978 | DRM Hockenheim GP | 3 | 935/77A | Dieter Schornstein | Porsche Kremer Racing Team | 9th |
| 29.7.1978 | DRM Hockenheim GP | 4 | 935/77A | "John Winter" | Minolta Kremer Team | DNF |
| 29.7.1978 | DRM Hockenheim GP | 5 | 935/77A | Manfred Schurti | Jägermeister Max Moritz Team | 2nd |
| 29.7.1978 | DRM Hockenheim GP | 6 | 935/77A | Toine Hezemans | Weisberg Gelo Team | 3rd |
| 29.7.1978 | DRM Hockenheim GP | 8 | 935/77A | John Fitzpatrick | Weisberg Gelo Team | 4th |
| 29.7.1978 | DRM Hockenheim GP | 9 | 935/77A | Klaus Ludwig | Weisberg Gelo Team | 1st |
| 29.7.1978 | DRM Hockenheim GP | 10 | 935/77A | Franz Konrad | Konrad Racing | DNA |
| 29.7.1978 | DRM Hockenheim GP | 11 | 935/77A | Reinhold Jöst | Liqui-Moly-Equipe | DNS |
| 29.7.1978 | DRM Hockenheim GP | 11 | 935 | Claude Haldi | Meccarillos Racing Team | 5th |
| 29.7.1978 | DRM Hockenheim GP | 16 | 935/77A | Volkert Merl | Konrad Racing | 8th |
| 29.7.1978 | DRM Hockenheim GP | 17 | 935 RSR | Eckhard Schimpf | | DNF |
| 29.7.1978 | DRM Hockenheim GP | 22 | 935 | Peter Hähnlein | Peter Hähnlein | DNA |
| 29.7.1978 | DRM Hockenheim GP | 33 | 935 | Claude Bourgoignie | | 10th |
| 29.7.1978 | DRM Hockenheim GP | 35 | 930 | Horst Schmid | Autohaus Max Moritz | DNF |
| 29.7.1978 | DRM Hockenheim GP | 40 | 911 Carrera RSR | Marco Vanoli | | 12th |
| 29.7.1978 | DRM Hockenheim GP | 44 | 934 | Angelo Pallavicini | | DNF |
| 29.7.1978 | DRM Hockenheim GP | 45 | 935 | Henri van Oorschot | Henri van Oorschot | 7th |