| 27.2.1983 | GP of Miami [GTU] | 04 | 911 | Vince DiLella | DiLella Racing | 14th |
| 27.2.1983 | GP of Miami [GTO] | 04 | 911 Carrera RSR | Soto | T&R Racing | 6th |
| 27.2.1983 | GP of Miami [GTO] | 07 | 924 Carrera GTR | Ludwig Heimrath | Heimrath Racing | DNA |
| 27.2.1983 | GP of Miami | 09 | 935 L | Wollek | Henn's Swap Shop Racing | 9th |
| 27.2.1983 | GP of Miami | 2 | 935 K4 | Fitzpatrick | John Fitzpatrick Racing | 4th |
| 27.2.1983 | GP of Miami [GTU] | 6 | 911 | Juan Lopez | Juan Lopez | 8th |
| 27.2.1983 | GP of Miami [GTO] | 9 | 934 | Wayne Baker | Personalized Autohaus | 25th |
| 27.2.1983 | GP of Miami | 9 | 935 K3/80 | Whittington | Henn's Swap Shop Racing | 6th |
| 27.2.1983 | GP of Miami [GTU] | 11 | 911 | Carlos Lopez | Carlos Alberto Lopez | 20th |
| 27.2.1983 | GP of Miami | 12 | 935/78-81 | Mass | John Fitzpatrick Racing | 8th |
| 27.2.1983 | GP of Miami [GTO] | 15 | 911 Carrera RSR 3.0 | Doug Lutz | DL Performance Eng. | 7th |
| 27.2.1983 | GP of Miami [GTU] | 16 | 911 | Paul Goral | Paul Goral | 18th |
| 27.2.1983 | GP of Miami | 18 | 935 JLP-4 | Rodriguez / St. James | JLP Racing | DNA |
| 27.2.1983 | GP of Miami | 24 | 935 JLP-2 | Speer / Madren | Pegasus III Racing | DNA |
| 27.2.1983 | GP of Miami [GTU] | 30 | 911 | Ron Case | Case Racing | 21st |
| 27.2.1983 | GP of Miami [GTO] | 34 | 924 Carrera GTR | George Drolsom | Drolsom Racing | 19th |
| 27.2.1983 | GP of Miami [GTU] | 39 | 911 | Donald Flores | Donald Flores | 22nd |
| 27.2.1983 | GP of Miami [GTU] | 42 | 911 S | Bill Bean | Gary Wonzer | 19th |
| 27.2.1983 | GP of Miami [GTO] | 50 | 911 Carrera RSR | Kikos Fonseca | Latino Racing | 5th |
| 27.2.1983 | GP of Miami [GTU] | 52 | 911 | Jack Swanson | TFC Racing | 15th |
| 27.2.1983 | GP of Miami [GTO] | 69 | 911 Carrera RSR | Londono | Londono Bridge Racing | 22nd |
| 27.2.1983 | GP of Miami [GTO] | 72 | 911 Carrera | George Hulse | The Foreign Car Repr. | 23rd |
| 27.2.1983 | GP of Miami [GTU] | 73 | 914/4 | Grostic / Lawhorn | G.O. Racing | DNA |
| 27.2.1983 | GP of Miami [GTU] | 78 | 911 | Klaus Bitterauf | Der Klaus Haus | 12th |
| 27.2.1983 | GP of Miami [GTO] | 79 | 924 Carrera GTR | Winters | Whitehall Promotions | 21st |
| 27.2.1983 | GP of Miami | 90 | 935 | | Garretson Enterprises | DNA |
| 27.2.1983 | GP of Miami [GTU] | 90 | 911 SC | Mike Schaefer | 901 Shop | DNA |
| 27.2.1983 | GP of Miami [GTO] | 91 | 934 | Chester Vincentz | Electrodyne | 12th |
| 19.3.1983 | 12 h Sebring | 04 | 911 | DiLella / Cueto | Di Lella Racing | 42nd |
| 19.3.1983 | 12 h Sebring | 05 | 935 M16 | Almeida / Soto | T & R Racing | 62nd |
| 19.3.1983 | 12 h Sebring | 06 | 911 Carrera | Lopez / Mendez | Juan Lopez | 23rd |
| 19.3.1983 | 12 h Sebring | 07 | 911 Carrera RSR | Flaquer / Londono | Londono Bridge Racing | 81st |
| 19.3.1983 | 12 h Sebring | 09 | 935 L | Bell / Andretti / Paul, Jr. | Henn's Swap Shop Racing | 56th |
| 19.3.1983 | 12 h Sebring | 2 | 935 K3 | Hinze / Lanier / Wolters | Hinze Fencing | DNS |
| 19.3.1983 | 12 h Sebring | 5 | 935 K3/80 | Akin / Whittington / O'Steen | Bob Akin Motor Racing | 2nd |
| 19.3.1983 | 12 h Sebring | 9 | 934 | Baker / Mullen / Nierop | Personalized Autohaus | 1st |
| 19.3.1983 | 12 h Sebring | 11 | 911 | Goral / Figaro / Uria | Paul Goral | 19th |
| 19.3.1983 | 12 h Sebring | 15 | 911 Carrera RSR 3.0 | Lutz / Brummer / Connor | DL Performance Engineering | 49th |
| 19.3.1983 | 12 h Sebring | 19 | 911 Carrera RSR | Van Every / Tisdelle | Van Every Racing | 39th |
| 19.3.1983 | 12 h Sebring | 23 | 911 Carrera RSR | Selby / Roe | Roe/Selby | 15th |
| 19.3.1983 | 12 h Sebring | 24 | 935 JLP-2 | Speer / Madren / Ratcliff | Pegasus III Racing | 44th |
| 19.3.1983 | 12 h Sebring | 30 | 911 | Case / Case / Pannacione | Case Racing | 32nd |
| 19.3.1983 | 12 h Sebring | 31 | 914/4 | Griffin | Pegasus Racing | 76th |
| 19.3.1983 | 12 h Sebring | 34 | 924 Carrera GTR | Drolsom / Cohen / Gelles | Drolsom Racing | 59th |
| 19.3.1983 | 12 h Sebring | 35 | 911 Carrera RSR | Leon / Gilgan / Pickering | Pegasus Racing | 10th |
| 19.3.1983 | 12 h Sebring | 36 | 924 Carrera GTR | Miller / Busby / Grable | Herman + Miller P+A | 50th |
| 19.3.1983 | 12 h Sebring | 42 | 911 S | Wonzer / Bean / Cason | Gary Wonzer | 37th |
| 19.3.1983 | 12 h Sebring | 50 | 911 Carrera RSR | Fonseca / Ferrer | Latino Racing | 77th |
| 19.3.1983 | 12 h Sebring | 52 | 911 | Gauthier / Cripe / Collins / McVey | TFC Racing | 65th |
| 19.3.1983 | 12 h Sebring | 58 | 924 Carrera GTR | Gregg / Rude / Henn | Brumos Racing | 35th |
| 19.3.1983 | 12 h Sebring | 65 | 911 Carrera RSR | Gordillo / Villa / Soldevilla | Manuel Villa | 7th |
| 19.3.1983 | 12 h Sebring | 68 | 911 S | Rynerson / McDonald / Wilder | Jack Rynerson | 27th |
| 19.3.1983 | 12 h Sebring | 69 | 934 | Gonzalez / Cruz | Hiram Cruz Racing | 20th |
| 19.3.1983 | 12 h Sebring | 73 | 914/4 | Grostic / Lawhorn | G. O. Racing | DNA |
| 19.3.1983 | 12 h Sebring | 78 | 911 | Bitterauf / Smith / Flanders | Der Klaus Haus | 68th |
| 19.3.1983 | 12 h Sebring | 79 | 924 Carrera GTR | Winters / Bergstrom / Dawe | Whitehall/Promotion | 43rd |
| 19.3.1983 | 12 h Sebring | 83 | 911 Carrera RSR | Brezinka / Bartling / Schramm | R & H Racing | 16th |
| 19.3.1983 | 12 h Sebring | 86 | 935/80 | Haywood / Holbert | Bayside Disposal Racing | 3rd |
| 19.3.1983 | 12 h Sebring | 87 | 911 | Gottfried / Turner / Flores | Don Flores | 51st |
| 19.3.1983 | 12 h Sebring | 89 | 911 Carrera RSR | "Jamsal" / Barrientos / Galdamez | Taca El Salvador | 24th |
| 19.3.1983 | 12 h Sebring | 90 | 911 SC | Schaefer / Zitza / Refenning | 901 Shop | 22nd |
| 19.3.1983 | 12 h Sebring | 93 | 911 | Higgins / King / Mead | Foreign Exchange | 31st |
| 19.3.1983 | 12 h Sebring | 94 | 935 K3/80 | Whittington / Whittington | Henn's Swap Shop Racing | 12th |
| 19.3.1983 | 12 h Sebring | 96 | 911 Carrera RSR | Byrd / Baker / Kirby | Weld Fixturing | 36th |
| 19.3.1983 | 12 h Sebring | 99 | 911 Carrera RSR | Londono / Munoz / Gralia | Londono Bridge Racing | 63rd |
| 20.3.1983 | DRM Zolder Bergischer Löwe | 1 | 956 | Bob Wollek | Warsteiner Team, Joest-Racing | 1st |
| 20.3.1983 | DRM Zolder Bergischer Löwe | 2 | 936C | Volkert Merl | Joest-Racing-Team | 3rd |
| 20.3.1983 | DRM Zolder Bergischer Löwe | 3 | 936/80 | Leopold von Bayern | Warsteiner Team, Joest-Racing | DNS |
| 20.3.1983 | DRM Zolder Bergischer Löwe | 4 | 956 | Clemens Schickentanz | Joest-Racing-Team | 6th |
| 20.3.1983 | DRM Zolder Bergischer Löwe | 10 | 956 | Jürgen Lässig | H. Obermaier Racing GmbH | DNF |
| 20.3.1983 | DRM Zolder Bergischer Löwe | 11 | 956 | John Fitzpatrick | John Fitzpatrick Racing | 2nd |
| 3.4.1983 | 500 km Suzuka | 1 | 956 | Fujita / Schuppan | Trust Racing Team | 1st |
| 3.4.1983 | SM Dijon | 125 | 935 RSR | Hans-Ruedi Hugentobler | | ?th |
| 3.4.1983 | SM Dijon | | 935 | Antoine Salamin | | ?th |
| 4.4.1983 | Thundersports Brands Hatch | 5 | 935 K3 | Robinson / Wood | Robinson Demolition/Wildwood Racing | 6th |
| 4.4.1983 | Thundersports Brands Hatch | 24 | 908/3 Turbo | Bell / Brunn | Siggi Brunn Racing | 1st |
| 4.4.1983 | Thundersports Brands Hatch | 34 | 934 Carrera RSR | Arif / Pye | Mid Kent Racing | 14th |
| 10.4.1983 | 500 km Road Atlanta | 0 | 935/78-81 | Moretti / van der Merwe | Momo Corse | 3rd |
| 10.4.1983 | 500 km Road Atlanta | 05 | 935 M16 | Almeida / Soto | T & R Racing | 18th |
| 10.4.1983 | 500 km Road Atlanta | 07 | 934 | Ludwig Heimrath | Heimrath Racing | 56th |
| 10.4.1983 | 1000 km Monza | 1 | 956 | Ickx / Mass | Rothmans Porsche | 2nd |
| 10.4.1983 | 500 km Road Atlanta | 1 | 935 JLP-4 | Paul, Jr. / Rodriguez | J.L.P. Racing | 6th |
| 10.4.1983 | DRM Hockenheim Jim Clark | 1 | 936C | Volkert Merl | Joest Racing | 2nd |
| 10.4.1983 | DRM Hockenheim Jim Clark | 3 | 936/80 | Leopold von Bayern | Warsteiner Team Joest Racing | 3rd |
| 10.4.1983 | 500 km Road Atlanta | 5 | 935 K3/80 | Akin / Whittington | Bob Akin Motor Racing | 43rd |
| 10.4.1983 | 500 km Road Atlanta | 8 | 911 S | Rynerson / Wilder | John Rynerson | 26th |
| 10.4.1983 | 500 km Road Atlanta | 9 | 934 | Baker / Mullen | Personalized Autohaus | 8th |
| 10.4.1983 | 500 km Road Atlanta | 14 | 914/6 | Jones / Apgar | Bruce Jones Racing | 38th |
| 10.4.1983 | DRM Hockenheim Jim Clark | 20 | 935 RSR | Urs Schweizer | Scuderia Basilea | raced |
| 10.4.1983 | DRM Hockenheim Jim Clark | 24 | 908/3 Turbo | Siegfried Brunn | Dr. Siegfried Brunn | 6th |
| 10.4.1983 | 500 km Road Atlanta | 24 | 935 JLP-2 | Speer / Madren | Pegasus III Racing | 25th |
| 10.4.1983 | 500 km Road Atlanta | 34 | 924 Carrera GTR | Drolsom / Johnson | Drolsom Racing | 24th |
| 10.4.1983 | 500 km Road Atlanta | 35 | 911 Carrera RSR | Leon / Pickering | Pegasus Racing | 31st |
| 10.4.1983 | 500 km Road Atlanta | 50 | 911 Carrera RSR | Kikos Fonseca | Latino Racing | 14th |
| 10.4.1983 | 500 km Road Atlanta | 58 | 924 Carrera GTR | Gregg / Rude | Brumos Racing | 20th |
| 10.4.1983 | 500 km Road Atlanta | 64 | 911 Carrera RSR | Ron Coupland | John Hulen | 51st |
| 10.4.1983 | 500 km Road Atlanta | 72 | 911 Carrera | Hulse / Hogan | THR | 50th |
| 10.4.1983 | 500 km Road Atlanta | 78 | 911 | Smith / Bitterauf | Der Klaus Haus | 36th |
| 10.4.1983 | 500 km Road Atlanta | 87 | 911 Carrera RSR | Lewis / Beasley | Bob Beasley | 41st |
| 10.4.1983 | 500 km Road Atlanta | 91 | 934 | Chester Vincentz | Electrodyne | 57th |