5 February 1978 - Daytona 24 Hours - World Championship for Makes

Rolf Stommelen, Toine Hezemans & Peter Gregg win in a Porsche 935/77A

18 March 1978 - Sebring 12 Hours - World Challenge for Endurance Drivers

Brian Redman, Charles Mendez & Bob Garretson win in a Porsche 935

19 March 1978 - Mugello 6 Hours - World Championship for Makes

Toine Hezemans, Hans Heyer & John Fitzpatrick win in a Porsche 935/77A

2 April 1978 - Talladega 6 Hours - World Challenge for Endurance Drivers

Peter Gregg & Brad Frisselle win in a Porsche 935

2 April 1978 - Interserie Nürburgring 300 km - European Sportscar Championship

Reinhold Joest second in a Porsche 908/03, 0.4s behind the winning Osella PA6 driven by Giorgio Francia

16 April 1978 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association

Peter Gregg wins in a Porsche 935

22 April 1978 - Dijon 6 Hours - World Championship for Makes

Bob Wollek & Henri Pescarolo win in a Porsche 935/77A

23 April 1978 - Monza 320km - European Sportscar Championship

Reinhold Joest wins in a Porsche 908/03

30 April 1978 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association

George Follmer wins in a Porsche 935/77A

7 May 1978 - Hallett 100 Miles - IMSA - International Motor Sport Association

Gianpiero Moretti 3rd in a Porsche 935 behind the winning BMW 320 i Turbo

7 May 1978 - Interserie Colmar-Berg - Interserie

Reinhold Joest wins in a Porsche 908/03

14 May 1978 - Silverstone 6 Hours - World Championship for Makes

Jochen Mass and Jacky Ickx win in a Porsche 935/78

14 May 1978 - Vallelunga 400km - European Sportscar Championship

Reinhold Joest & Mario Casoni win in a Porsche 908/03

28 May 1978 - Nürburgring 1000 km - World Championship for Makes

Klaus Ludwig, Hans Heyer & Toine Hezemans win in a Porsche 935/77A

29 May 1978 - Lime Rock 100 Miles - IMSA - International Motor Sport Association

Peter Gregg wins in a Porsche 935/77A

4 June 1978 - Trans-Am Westwood - Trans-Am

Ludwig Heimrath, Sr wins in a Porsche 935

11 June 1978 - Trans-Am Portland - Trans-Am

Ludwig Heimrath, Sr second in a Porsche 935, 1 lap behind the winning Chevrolet Monza driven by Tuck Thomas

11 June 1978 - Le Mans 24 Hours - World Challenge for Endurance Drivers

Bob Wollek, Jürgen Barth & Jacky Ickx 2nd in a Porsche 936/78, 5 laps behind the winning Alpine A442 B driven by Didier Pironi and Jean-Pierre Jaussaud

18 June 1978 - Brainerd 100 Miles - IMSA - International Motor Sport Association

Peter Gregg wins in a Porsche 935/77A

25 June 1978 - Misano 6 Hours - World Championship for Makes

Bob Wollek & Henri Pescarolo win in a Porsche 935/77A

25 June 1978 - Trans-Am Mont-Tremblant - Trans-Am

Monte Shelton wins in a Porsche 935

4 July 1978 - Daytona 250 Miles Paul Revere - IMSA - International Motor Sport Association

Peter Gregg wins in a Porsche 935/77A

8 July 1978 - Watkins Glen 6 Hours - World Championship for Makes

Toine Hezemans, John Fitzpatrick & Peter Gregg win in a Porsche 935/77A

16 July 1978 - Interserie Kassel-Calden - Interserie

Bob Wollek wins in a Porche 908/03 Turbo

23 July 1978 - Salzburg - European Sportscar Championship

Reinhold Joest wins in a Porsche 908/03

30 July 1978 - Sears Point 100 Miles - IMSA - International Motor Sport Association

Don Whittington second in a Porsche 934/5, 1m,2s behind the winning BMW 320 i Turbo driven by David Hobbs

6 August 1978 - Portland 100 Miles - IMSA - International Motor Sport Association

Peter Gregg wins in a Porsche 935/77A

19 August 1978 - Trans-Am Mosport - Trans-Am

Ludwig Heimrath, Sr second in a Porsche 935, 37.811s behind the winning Chevrolet Corvette C3 driven by Greg Pickett

27 August 1978 - Mid Ohio 250 Miles - IMSA - International Motor Sport Association

Bill Whittington & Jim Busby win in a Porsche 935/77A

27 August 1978 - Interserie Ulm - Interserie

Reinhold Jöst wins in a Porsche 908/03 Turbo

3 September 1978 - Vallelunga 6 Hours - World Championship for Makes

Henri Pescarolo & Bob Wollek win in a Porsche 935/77A

4 September 1978 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association

Peter Gregg wins in a Porsche 935/77A

10 September 1978 - Interserie Nürburgring - Interserie

Reinhold Jöst wins in a Porsche 908/03 Turbo

17 September 1978 - Norisring Trophäe - Non Championship Race

Bob Wollek wins in a Porsche 935/77A.

8 October 1978 - Trans-Am Laguna Seca - Trans-Am

Ludwig Heimrath, Sr third in a Porsche 935, 1 lap behind the winning Chevrolet Corvette C3 driven by Greg Pickett

5 November 1978 - Trans-Am Mexico - Trans-Am

Ludwig Heimrath, Sr wins in a Porsche 935

26 November 1978 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association

Peter Gregg wins in a Porsche 935/77A