6 February 1983 - Daytona 24 Hours - IMSA - International Motor Sport Association

Bob Wollek, Claude Ballot-Léna, Preston Henn & A. J. Foyt win in a Porsche 935 L

27 February 1983 - Miami GP - IMSA - International Motor Sport Association

John Fitzpatrick 4th in a Porsche 935 K4

27 February 1983 - GP Miami IMSA GTO - IMSA - International Motor Sport Association

Ludwig Heimrath second in a Porsche 935, 16.487s behind the winning Chevrolet Camaro driven by Gene Felton

19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association

Wayne Baker, Jim Mullen & Kees Nierop win in a Porsche 934

4 April 1983 - Thundersports Brands Hatch - Thundersports

Derek Bell & Siegfried Brunn win in a Porsche (08/03 Turbo

10 April 1983 - Road Atlanta 500 km - IMSA - International Motor Sport Association

Gianpiero Moretti & Sarel van der Merwe 3rd in a Porsche 935/78-81, 2 laps behind the winning Jaguar XJR-5 driven by Bob Tullius and Bill Adam

10 April 1983 - Monza 1000 km - World Endurance Championship

Bob Wollek and Thierry Boutson win in Porsche 956

24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association

John Fitzpatrick, David Hobbs & Derek Bell win in a Porsche 935 K4

1 May 1983 - Trans-Am Moroso - Trans-Am

Ludwig Heimrath, Sr 6th in a Porsche 935

1 May 1983 - DRM Avus - DRM - Deutsche Rennsport Meisterschaft

Bob Wollek wins in a Porsche 956

1 May 1983 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association

Wayne Baker 9th overall and 5th in GTO class, 6 laps behind the winning March 83G driven by Al Holbert

8 May 1983 - Silverstone 1000 km - World Endurance Championship

Stefan Bellof and Derek Bell win in Porsche 956

15 May 1983 - Charlotte 500 km - IMSA - International Motor Sport Association

M. L. Speer & Ken Madren 4th in a Porsche 935 JLP-2, 4 laps behind the winning March 83G driven by Al Holbert and Jim Trueman

29 May 1983 - Nürburgring 1000 km - World Endurance Championship

Jochen Mass and Jacky Ickx win in Porsche 956

30 May 1983 - Lime Rock 3 Hours - IMSA - International Motor Sport Association

Bob Akin & John O'Steen second in a Porsche 935 K3/80, 1 lap behind the winning Jaguar XJR-5 driven by Bob Tullius and Bill Adam

19 June 1983 - Mid-Ohio 6 Hours - IMSA - International Motor Sport Association

Bob Akin & John O'Steen 2nd in a Porsche 935 K3/80, 11 laps behind the winning March 83G driven by Jim Trueman, Doc Bundy & Bobby Rahal

19 June 1983 - Le Mans 24 Hours - World Endurance Championship

Vern Schuppan, Al Holbert and Hurley Haywood win in Porsche 956

3 July 1983 - Daytona 250 Miles Paul Revere - IMSA - International Motor Sport Association

Hurley Haywood & A. J. Foyt win in a Porsche 935 L

10 July 1983 - Brainerd 500 km - IMSA - International Motor Sport Association

Bob Akin & Dennis Aase 4th in a Porsche 935 K3/80, 2 laps behind the winning March 83G driven by Al Holbert and Jim Trueman

24 July 1983 - DRM Diepholz - DRM - Deutsche Rennsport Meisterschaft

Franz Konrad wins in Porsche 956

24 July 1983 - Sears Point 3 Hours - IMSA - International Motor Sport Association

Sarel van der Merwe & Gianpiero Moretti seventh in a Porsche 935/81, 6 laps behind the winning March 83G driven by Al Holbert & Jim Trueman

31 July 1983 - Trans-Am Road America - Trans-Am

Ludwig Heimrath, Sr fourth in a Porsche 935

31 July 1983 - Portland 3 Hours - IMSA - International Motor Sport Association

Wayne Baker & Jim Mullen highest placed Porsche 5th in a Porsche 934

14 August 1983 - Mosport 6 Hours - IMSA - International Motor Sport Association

Highest placed Porsche was a Porsche 914/6 driven by Tim Selby and Earl Roe, which was 8th overall and 3rd in GTU class

21 August 1983 - Road America 500 Miles - IMSA - International Motor Sport Association

Highest placed Porsche was a Porsche 914/6 driven by Tim Selby and Earl Roe, which was 14th overall and 5th in GTU class

4 September 1983 - Spa 1000 km - World Endurance Championship

Jacky Ickx and Jochen Mass win in Porsche 956

11 September 1983 - Pocono 500 Miles - IMSA - International Motor Sport Association

Sarel van der Merwe & Gianpiero Moretti 2nd in a Porsche 935/78-81, 3 laps behind the winning Jaguar XJR-5 driven by Bob Tullius and Doc Bundy.

2 October 1983 - Fuji 1000 km - World Endurance Championship

Derek Bell and Stefan Bellof win in Porsche 956

27 November 1983 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association

Bob Akin & John O'Steen second in a Porsche 935-85 behind the winning March 83G driven by Al Holbert and Jim Trueman

10 December 1983 - Kyalami 1000 km - World Endurance Championship

Derek Bell and Stefan Bellof win in Porsche 956