| 30.5.1983 | Thundersports Brands Hatch | 5 | 935 K3 | Robinson / Wood | Robinson Demolition/Wildwood Racing | 8th |
| 30.5.1983 | Thundersports Brands Hatch | 34 | 934 Carrera RSR | Arif / Wood | Mid Kent Racing | raced |
| 30.5.1983 | 3 h Lime Rock | 77 | 914/6 | Resnick / Barnaba | | 17th |
| 5.6.1983 | 500 km Fuji | 5 | 935 | Wada / Sugisaki / Nagata | Nagata Racing (A) | DNF |
| 5.6.1983 | 500 km Fuji | 6 | 956 | Fujita / Schuppan | Trust Racing Team | 1st |
| 5.6.1983 | Nordic SS Ahvenisto | 14 | 911 | Björn Persson | | raced/- |
| 5.6.1983 | Nordic SS Ahvenisto | 18 | 911 | Jan Ankarberg | | raced/- |
| 5.6.1983 | Trans-Am Sears Point | 36 | 924 Carrera GTR | Paul Miller | Herman+Miller Porsche-Audi | 17th |
| 5.6.1983 | Trans-Am Sears Point | 56 | 911 SC | Karl Durkheimer | Vasek Polak Racing | 21st |
| 5.6.1983 | Can-Am Mosport | | 956 | Bob Wollek | Joest Racing | DNA |
| 12.6.1983 | Trans-Am Portland | 10 | 934 | John Klug | John Klug Racing | 19th |
| 12.6.1983 | Trans-Am Portland | 36 | 924 Carrera GTR | Paul Miller | Herman+Miller Porsche-Audi | 30th |
| 12.6.1983 | Trans-Am Portland | 54 | 911 SC | David Schroeder | Motorsports International | 31st |
| 12.6.1983 | Trans-Am Portland | 56 | 911 SC | Karl Durkheimer | Vasek Polak Racing | 7th |
| 12.6.1983 | Trans-Am Portland | 57 | 911 SC | Monte Shelton | Porsche-Audi Northwest | 20th |
| 12.6.1983 | Trans-Am Portland | 58 | 911 SC | Neil Shelton | Porsche-Audi Northwest | 18th |
| 12.6.1983 | Trans-Am Portland | 69 | 911 SC | Nick Feodorhoff | Performance Unlimited | 22nd |
| 12.6.1983 | Trans-Am Portland | 91 | 924 Carrera GTR | Bob Hagestad | Bob Hagestad Porsche-Audi | 34th |
| 19.6.1983 | 6 h Mid-Ohio | 03 | 934 | Frank / Borlase | Toyota Village | 12th |
| 19.6.1983 | 24 h Le Mans | 1 | 956 | Ickx / Bell | Rothmans Porsche | 2nd |
| 19.6.1983 | 24 h Le Mans | 2 | 956 | Mass / Bellof | Rothmans Porsche | DNF |
| 19.6.1983 | MEZ Havířov | 3 | 934 Carrera RSR | Horst Kulas | Vereinigung Berliner Automobilsportler | DNF |
| 19.6.1983 | 24 h Le Mans | 3 | 956 | Schuppan / Holbert / Haywood | Rothmans Porsche | 1st |
| 19.6.1983 | 6 h Mid-Ohio | 5 | 935 K3/80 | Akin / O'Steen | Bob Akin Racing | 2nd |
| 19.6.1983 | 24 h Le Mans | 8 | 956 | Johansson / Ludwig / Wollek | Sorga S.A. | 6th |
| 19.6.1983 | 6 h Mid-Ohio | 8 | 911 Carrera RSR | Bob Beasley | Bob Beasley | 47th |
| 19.6.1983 | 6 h Mid-Ohio | 9 | 934 | Baker / Mullen / Nierop | WLB Racing | 24th |
| 19.6.1983 | 24 h Le Mans | 10 | CK5 | Kroesemeijer / Merl | Porsche Kremer Racing | DNA |
| 19.6.1983 | 24 h Le Mans | 11 | 956 | Fitzpatrick / Hobbs / Quester | Fitzpatrick Racing | DNF |
| 19.6.1983 | 24 h Le Mans | 12 | 956 | Merl / Schickentanz / DeNarvaez | Sorga S.A. | 4th |
| 19.6.1983 | 24 h Le Mans | 14 | 956 | Lammers / Palmer / Lloyd | Canon Racing | 8th |
| 19.6.1983 | 24 h Le Mans | 15 | 936C | Martin / Martin / Duez | Joest Racing - Belga Team | DNF |
| 19.6.1983 | 24 h Le Mans | 16 | 956 | Edwards / Keegan / Fitzpatrick | Fitzpatrick Racing | 5th |
| 19.6.1983 | 24 h Le Mans | 18 | 956 | Plankenhorn / Wilson / Lässig | Obermaier Racing | 7th |
| 19.6.1983 | 24 h Le Mans | 21 | 956 | Andretti / Andretti / Alliot | Porsche Kremer Racing | 3rd |
| 19.6.1983 | 24 h Le Mans | 22 | CK5-83 | Warwick / Jelinski / Gaillard | Porsche Kremer Racing | DNF |
| 19.6.1983 | 6 h Mid-Ohio | 23 | 914/6 | Roe / Selby | Roe/Selby Racing | 16th |
| 19.6.1983 | 6 h Mid-Ohio | 24 | 935 JLP-2 | Madren / Speer | Pegasus III Racing | 9th |
| 19.6.1983 | 6 h Mid-Ohio | 30 | 935/78-81 | van der Merwe / Moretti | Momo Corse | 6th |
| 19.6.1983 | 24 h Le Mans | 33 | 956 | Ickx / Bell / Schuppan / Barth | Rothmans Porsche | T-car |
| 19.6.1983 | 6 h Mid-Ohio | 34 | 924 Carrera GTR | Drolsom / Rude | Drolsom Racing | 14th |
| 19.6.1983 | 6 h Mid-Ohio | 35 | 911 Carrera RSR | Leon / Pickering | Team Dallas | 15th |
| 19.6.1983 | 6 h Mid-Ohio | 36 | 924 Carrera GTR | Busby / Grable | Herman+Miller P+A | 34th |
| 19.6.1983 | 24 h Le Mans | 42 | CK5 | Cleare / Dron / Jones | Richard Cleare | DNF |
| 19.6.1983 | 24 h Le Mans | 47 | 956 | Henn / Schlesser / Ballot-Léna | Fitzpatrick Racing | 10th |
| 19.6.1983 | 6 h Mid-Ohio | 64 | 911 Carrera RSR | Hulen / Coupland | John Hulen | 36th |
| 19.6.1983 | 24 h Le Mans | 69 | 935 L1 | Lundgardh / Simonsen / Wilds | Jan Lundgardh | DNA |
| 19.6.1983 | 6 h Mid-Ohio | 77 | 914/6 | Resnick / Barnaba / Swiren | Porsche Recyclers | DNA |
| 19.6.1983 | 6 h Mid-Ohio | 79 | 924 Carrera GTR | Bergstrom | Promotion-Whitehall | 49th |
| 19.6.1983 | 6 h Mid-Ohio | 91 | 934 | Vincentz / White | Electrodyne | 4th |
| 19.6.1983 | 24 h Le Mans | 91 | 930 | Lemerle / Yvon / Krankenberg | Edgar Dören | DNF |
| 19.6.1983 | 24 h Le Mans | 92 | 930 | Memminger / Müller / Kuhn-Weiss | Georg Memminger | 13th |
| 19.6.1983 | 24 h Le Mans | 93 | 930 | Cooper / Smith / Ovey | Charles Ivey Racing | 11th |
| 19.6.1983 | 24 h Le Mans | 94 | 930 | Haldi / Steckkönig / Schiller | Claude Haldi | DNF |
| 19.6.1983 | 24 h Le Mans | 95 | 930 | Alméras / Alméras / Guillot | Equipe Alméras Freres | 15th |
| 19.6.1983 | 6 h Mid-Ohio | 96 | 911 Carrera RSR | Byrd / Silver | Weld Fixturing | 20th |
| 19.6.1983 | 24 h Le Mans | 96 | 930 | Lateste / Bienvault / Touroul | Michel Lateste | 20th |
| 19.6.1983 | 24 h Le Mans | 97 | 928 S | Gonin / Boutinaud / Le Page | Raymond Boutinnaud | NC |
| 19.6.1983 | 24 h Le Mans | | 930 | Piazza / Ciseri / Frey / Regusci | Hobby Rallye | DNA |
| 19.6.1983 | 24 h Le Mans | | 930 | Brucelle / Verney / Vernier | Gerard Brucelle | DNA |
| 19.6.1983 | 24 h Le Mans | | 911 | Hery / Bouvet | Jacky Hery | DNA |
| 25.6.1983 | Thundersports Oulton Park | 5 | 935 K3 | Robinson / Wood | Robinson Demolition/Wildwood Racing | 5th |
| 25.6.1983 | Thundersports Oulton Park | 24 | 908/3 Turbo | Wilson / Brunn | Ebor/Saddleworth Motor Co. | DNF |
| 25.6.1983 | Thundersports Oulton Park | 24T | 908/3 | Wilson / Brunn | Ebor/Saddleworth Motor Co. | T-car |
| 26.6.1983 | Trans-Am Kent | 23 | 911 SC | Bob Zulkowski | Metal Craft | DNA |
| 26.6.1983 | Trans-Am Kent | 36 | 924 Carrera GTR | Paul Miller | Herman & Miller Porsche & Audi | 2nd |
| 26.6.1983 | Trans-Am Kent | 54 | 911 SC | David Schroeder | Motorsports International | 7th |
| 26.6.1983 | Trans-Am Kent | 56 | 911 SC | Karl Durkheimer | V. Polak | 11th |
| 26.6.1983 | Trans-Am Kent | 57 | 911 SC | Monte Shelton | Porsche-Audi Northwest | DNA |
| 26.6.1983 | Trans-Am Kent | 58 | 911 SC | Monte Shelton | Porsche-Audi Northwest | 29th |
| 26.6.1983 | Trans-Am Kent | 59 | 911 SC | Nick Feodorhoff | Performance Unlimited | 19th |
| 26.6.1983 | Trans-Am Kent | 91 | 924 Carrera GTR | Bob Hagestad | Bob Hagestad Porsche Audi | DNA |
| 3.7.1983 | Norisring Trophäe | 1 | 956 | Bob Wollek | Warsteiner-Team, Joest-Racing | 3rd |
| 3.7.1983 | DRM Norisring | 1 | 956 | Bob Wollek | Warsteiner-Team/Joest-Racing | 1st |
| 3.7.1983 | DRM Norisring | 2 | 956 | Volkert Merl | Joest-Racing | 3rd |
| 3.7.1983 | DRM Norisring | 3 | 936/80 | Leopold von Bayern | Warsteiner-Team/Joest-Racing | 7th |
| 3.7.1983 | Norisring Trophäe | 4 | 936C | Stefan Johansson | Joest-Racing | 7th |
| 3.7.1983 | DRM Norisring | 4 | 936C | Stefan Johansson | Joest-Racing | 4th |
| 3.7.1983 | 250 mile Daytona Paul Revere | 5 | 935 K3/80 | Akin / O'Steen | Bob Akin Motor Racing | 3rd |
| 3.7.1983 | 250 mile Daytona Paul Revere | 6 | 935 L | Haywood / Foyt | Henn's Swap Shop Racing | 1st |
| 3.7.1983 | Norisring Trophäe | 9 | 956 | Stefan Bellof | Rothmans Porsche | 1st |
| 3.7.1983 | 250 mile Daytona Paul Revere | 9 | 934 | Baker / Mullen | Wayne Baker Racing | 18th |
| 3.7.1983 | DRM Norisring | 10 | 956 | John Fitzpatrick | John Fitzpatrick Racing | DNF |
| 3.7.1983 | DRM Norisring | 11 | 956 | John Fitzpatrick | John Fitzpatrick Racing | DNA |
| 3.7.1983 | Norisring Trophäe | 19 | 956 | Harald Grohs | Liqui Moly Equipe | DNF |
| 3.7.1983 | DRM Norisring | 21 | 956 | Jan Lammers | Canon Racing | raced |
| 3.7.1983 | 250 mile Daytona Paul Revere | 24 | 935 JLP-2 | Speer / Pickering | Pegasus III Racing | 5th |
| 3.7.1983 | DRM Norisring | 25 | 908/3 Turbo | Jochen Dauer | Dr. Siegfried Brunn | 6th |
| 3.7.1983 | 250 mile Daytona Paul Revere | 34 | 924 Carrera GTR | George Drolsom | Drolsom Racing | 39th |
| 3.7.1983 | 250 mile Daytona Paul Revere | 35 | 911 Carrera | Griffin / Gilgan | | 23rd |
| 3.7.1983 | 250 mile Daytona Paul Revere | 42 | 911 S | Wonzer / Bean | Gary Wonzer | 30th |
| 3.7.1983 | 250 mile Daytona Paul Revere | 61 | 935 | Gottfried / Refenning | | 15th |
| 3.7.1983 | 250 mile Daytona Paul Revere | 90 | 911 SC | Schaefer / Tilton | 901 Shop | 21st |
| 3.7.1983 | DRM Norisring | 115 | CK5-83 | Frank Jelinski | Porsche Kremer Racing | 5th |
| 3.7.1983 | DRM Norisring | 119 | 956 | Brun | Brun Motorsport | DNF |
| 3.7.1983 | DRM Norisring | 122 | 956 | Jürgen Lässig | Boss-Obermaier-Racing GmbH | DNF |
| 3.7.1983 | DRM Norisring | 135 | 908/3 Turbo | Jochen Dauer | Joest-Racing | DNA |
| 3.7.1983 | SM Hockenheim | | 935 Carrera RSR | Rolf Madörin | | 4th |
| 3.7.1983 | SM Hockenheim | | 935 | Antoine Salamin | | 5th |
| 3.7.1983 | SM Hockenheim | | | Michel Pfefferle | | 13th |