| 19.6.1983 | 24 h Le Mans | 1 | 956 | Ickx / Bell | Rothmans Porsche | 2nd |
| 19.6.1983 | 24 h Le Mans | 3 | 956 | Schuppan / Holbert / Haywood | Rothmans Porsche | 1st |
| 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 | 15 | 936C | Martin / Martin / Duez | Joest Racing - Belga Team | DNF |
| 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 | 24 h Le Mans | 91 | 930 | Lemerle / Yvon / Krankenberg | Edgar Dören | DNF |
| 19.6.1983 | 24 h Le Mans | 97 | 928 S | Gonin / Boutinaud / Le Page | Raymond Boutinnaud | NC |
| 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 | Norisring Trophäe | 2 | 956 | Volkert Merl | Joest-Racing | DNF |
| 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 | 3 | 936/80 | Leopold von Bayern | Warsteiner-Team, Joest-Racing | 9th |
| 3.7.1983 | DRM Norisring | 4 | 936C | Stefan Johansson | Joest-Racing | 4th |
| 3.7.1983 | Norisring Trophäe | 4 | 936C | Stefan Johansson | Joest-Racing | 7th |
| 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 | 8 | 956 | Jochen Mass | Rothmans Porsche | 2nd |
| 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 | Norisring Trophäe | 10 | 956 | David Hobbs | John Fitzpatrick Racing | DNF |
| 3.7.1983 | Norisring Trophäe | 11 | 956 | John Fitzpatrick | John Fitzpatrick Racing | 4th |
| 3.7.1983 | DRM Norisring | 11 | 956 | John Fitzpatrick | John Fitzpatrick Racing | DNA |
| 3.7.1983 | Norisring Trophäe | 12 | 956 | Keke Rosberg | Porsche Kremer Racing | 5th |
| 3.7.1983 | Norisring Trophäe | 15 | CK5-83 | Frank Jelinski | Porsche Kremer Racing | 13th |
| 3.7.1983 | Norisring Trophäe | 19 | 956 | Harald Grohs | Liqui Moly Equipe | DNF |
| 3.7.1983 | Norisring Trophäe | 21 | 956 | Jan Lammers | Canon Racing | 14th |
| 3.7.1983 | DRM Norisring | 21 | 956 | Jan Lammers | Canon Racing | raced |
| 3.7.1983 | Norisring Trophäe | 22 | 956 | Jürgen Lässig | Boss-Obermeier-Racing GmbH | DNS |
| 3.7.1983 | 250 mile Daytona Paul Revere | 24 | 935 JLP-2 | Speer / Pickering | Pegasus III Racing | 5th |
| 3.7.1983 | Norisring Trophäe | 25 | 908/3 Turbo | Jochen Dauer | Dr. Siegfried Brunn | 8th |
| 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 | Norisring Trophäe | 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 |
| 10.7.1983 | Australian GT Adelaide | 3 | 935/80 | Rusty French | John Sands Racing | 1st |
| 10.7.1983 | Australian GT Adelaide | 4 | 935/77A | Alan Browne | John Sands Racing | DNA |
| 10.7.1983 | 500 km Brainerd | 5 | 935 K3/80 | Akin / Aase | Bob Akin Motor Racing | 4th |
| 10.7.1983 | Erding [S/GT] | 8 | 911 SC | Heinz Bausch | Heinz Bausch | DNA |
| 10.7.1983 | 500 km Brainerd | 13 | 911 | Johnson / Wilkie | Autoworks | 21st |
| 10.7.1983 | Erding [S/GT] | 25 | 936/80 | Leopold von Bayern | Warsteiner Jöst-Racing | DNA |
| 10.7.1983 | Erding [S/GT] | 27 | 935/77A | Franz Gschwender | Franz Gschwender | DNA |
| 10.7.1983 | Erding [S/GT] | 28 | 910 | Sepp Greger | Sepp Greger | DNA |
| 10.7.1983 | Erding [S/GT] | 29 | 956 | | Obermaier Racing GmbH | DNA |
| 10.7.1983 | 500 km Brainerd | 34 | 924 Carrera GTR | George Drolsom | Drolsom Racing | 25th |
| 10.7.1983 | 500 km Brainerd | 50 | 935 K3/80 | Pusey / Rude | Drax Racing | 18th |
| 10.7.1983 | Erding [S/GT] | | 935/77A | Siegfried Brunn | Brunn | DNF |
| 17.7.1983 | Can-Am Road America | 11 | 956 | John Fitzpatrick | John Fitzpatrick | 1st |
| 17.7.1983 | National Salzburgring | 16 | | Willy Rabl | Rara-Vienna | DNA |
| 17.7.1983 | National Salzburgring | 17 | | Willy Rabl | Rara-Vienna | DNA |
| 17.7.1983 | Trans-Am Mid-Ohio | 36 | 924 Carrera GTR | Paul Miller | Herman & Miller | 12th |
| 17.7.1983 | Trans-Am Mid-Ohio | 90 | 934 | John Klug | John Klug Racing | 17th |
| 17.7.1983 | Trans-Am Mid-Ohio | 91 | 924 Carrera GTR | Bob Hagestad | Bob Hagestad Porsche Audi | 25th |
| 24.7.1983 | 3 h Sears Point | 08 | 911 | Auberlen / Jauker | | 18th |
| 24.7.1983 | DRM Diepholz | 2 | 956 | Volkert Merl | Joest Racing | DNF |
| 24.7.1983 | 1000 km Fuji | 6 | 956 | Fujita / Schuppan | Trust Racing Team | 1st |
| 24.7.1983 | 3 h Sears Point | 8 | 911 | Johnson / Maas | John Johnson | 13th |
| 24.7.1983 | 3 h Sears Point | 9 | 934 | Baker / Mullen | Wayne Baker Racing | 8th |
| 24.7.1983 | DRM Diepholz | 10 | 956 | Franz Konrad | Porsche Kremer Racing | 1st |
| 24.7.1983 | 3 h Sears Point | 30 | 935/78-81 | van der Merwe / Moretti | Momo Corse | 7th |
| 24.7.1983 | 3 h Sears Point | 31 | 911 Carrera RSR | Marx / Follmer | RSR Associates | 22nd |
| 24.7.1983 | 3 h Sears Point | 51 | 911 | Feodorhoff / Neumann | Performance Unlimited | 19th |
| 24.7.1983 | 3 h Sears Point | 69 | 911 Carrera | Herman / Madsen | Davin Motorsports | 21st |
| 24.7.1983 | 3 h Sears Point | 70 | 911 | Regan / Chmura | | 14th |
| 24.7.1983 | 3 h Sears Point | 79 | 924 Carrera GTR | Winters / Bergstrom | Whitehall Promotions | 16th |
| 24.7.1983 | 3 h Sears Point | 81 | 911 | Nylander / Bell | | 17th |
| 24.7.1983 | DRM Diepholz | | 956 | Bob Wollek | Joest Racing | 4th |
| 24.7.1983 | DRM Diepholz | | 936/80 | Leopold von Bayern | Warsteiner-Team/Joest-Racing | 5th |
| 31.7.1983 | 3 h Portland | 08 | 911 Carrera | Auberlen / Jauker | | 23rd |
| 31.7.1983 | Australian GT Calder | 3 | 935/80 | Rusty French | John Sands Racing | 3rd |
| 31.7.1983 | Australian GT Calder | 4 | 935/77A | Alan Browne | John Sands Racing | 5th |
| 31.7.1983 | Australian GT Calder | 5 | 911 Carrera RSR | Peter Fitzgerald | Peter Fitzgerald | 4th |
| 31.7.1983 | Australian GT Calder | 28 | 944 Turbo | Colin Bond | Porsche Cars Australia | 2nd |
| 31.7.1983 | Trans-Am Road America | 91 | 934 | John Klug | John Klug Racing | 27th |
| 31.7.1983 | Trans-Am Road America | 91 | 924 Carrera GTR | Bob Hagestad | Hagestad Porsche/Audi | DNA |