| 1.5.1973 | Interserie Imola | 1 | 917/10 TC | Leo Kinnunen | Motorsport-Club Stuttgart/Racing Team AAW | 2nd |
| 1.5.1973 | Interserie Imola | 2 | 917/10 TC | Willi Kauhsen | Willi Kauhsen Racing Team | 1st |
| 1.5.1973 | Interserie Imola | 6 | 917/10 TC | Georg Loos | Gelo Racing Team | 3rd |
| 1.5.1973 | Interserie Imola | 9 | 908/03 | Reinhold Jöst | Reinhold Jöst | 5th |
| 1.5.1973 | Interserie Imola | 11 | 917/10 TC | Charlie Kemp | Rinzler Motor Racing Inc. | 8th |
| 1.5.1973 | Interserie Imola | 16 | 917/10 TC | George Follmer | Rinzler RC Cola | 11th |
| 5.5.1973 | Trans-Am Lime Rock | 9 | 911 Carrera RSR 2.8 | Allison / Hagestad | Bob Hagestad Porsche-Audi | 32nd |
| 5.5.1973 | Trans-Am Lime Rock | 14 | 911 Carrera RSR | Al Holbert | Holbert's Porsche-Audi | 3rd |
| 5.5.1973 | Trans-Am Lime Rock | 51 | 911 Carrera RSR 2.8 | Keyser / Behr | Toad Hall Motor Racing | 4th |
| 5.5.1973 | Trans-Am Lime Rock | 59 | 911 Carrera RSR 2.8 | Gregg / Posey | Brumos Porsche-Audi Corp. | 2nd |
| 5.5.1973 | Trans-Am Lime Rock | 70 | 911 Carrera RSR | Milt Minter | Bob Harmon Racing | 1st |
| 5.5.1973 | Trans-Am Lime Rock | 74 | 911 S | Ludwig Heimrath | Heimrath Racing | 9th |
| 5.5.1973 | Trans-Am Lime Rock | 90 | 911 ST | Dancose / Bienvenue | Marc Dancose | 26th |
| 5.5.1973 | Trans-Am Lime Rock | 92 | 911 S | Tillson / Oest | Oest/Tillson Racing | 11th |
| 5.5.1973 | Trans-Am Lime Rock | | 911 S | Mollin / Weiss | AMRE | 13th |
| 5.5.1973 | Trans-Am Lime Rock | | 911 T | Klaus Selbert | Airport Motorsport | 12th |
| 5.5.1973 | Trans-Am Lime Rock | | 911 ST | Stone / Downs | Silverstone Ent. | 25th |
| 6.5.1973 | Benguela | 7 | 906 | Herculano Areias | | 4th |
| 6.5.1973 | 1000 km Spa | 10 | 908/03 | Haldi / Fernandez | Porsche Club Romand | DNA |
| 6.5.1973 | 1000 km Spa | 40 | 911 Carrera RSR 2.8 | Follmer / Jöst | Porsche Stuttgart | 10th |
| 6.5.1973 | 1000 km Spa | 41 | 911 Carrera RSR 2.8 | van Lennep / Müller | Porsche Stuttgart | 5th |
| 6.5.1973 | 1000 km Spa | 45 | 911 Carrera RSR | Georg Loos | Gelo Racing | DNA |
| 6.5.1973 | 1000 km Spa | 46 | 911 Carrera RSR | Schickentanz / Fitzpatrick | Oldenkott Tobacco | 14th |
| 6.5.1973 | 1000 km Spa | 47 | 911 Carrera RSR | Fitzpatrick / Keller | Auto Kremer | DNF |
| 6.5.1973 | 1000 km Spa | 49 | 911 | Cyril Grandet | Grandet ORECA | DNA |
| 6.5.1973 | 1000 km Spa | 52 | 911 Carrera RSR 2.8 | Sindel / Siegle | Rallye Ulm | DNF |
| 6.5.1973 | 1000 km Spa | 53 | 911 Carrera RSR 2.8 | Haldi / Chenevière | Porsche Club Romand | 11th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 436 | 911 T | Bernd Renneisen | Bernd Renneisen | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 437 | 911 T | Klaus Hering | VSA München | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 438 | 911 S | Edy Welti | FRC Zürich | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 439 | 911 S | Edi Kofel | Mascotte-Racing-Team | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 440 | 911 S | Jean-Claude Béring | Ecurie des Ordons | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 441 | 911 S | Roger Brunnschweiler | FRC Zürich | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 442 | 911 S | Edy Brandenberger | Scuderia Basilea | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 443 | 911 S | Friedrich Straumann | Ecurie Basilisk | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 444 | 911 S | Roger Favre | Mascotte-Racing-Team | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 445 | 911 S | Patrick Meschia | Ecurie de la Cote | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 450 | 911 S | Hans Hargarten | Hans Hargarten | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 451 | 914/6 | Peter Karl Nowak | Sixtant-Racing-Team | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 452 | 914/6 | Hans Christian Jürgensen | Hans Christian Jürgensen | DQ |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 453 | 914/6 | Jochen Engel | Mannheim-Heidelberg Sports-Touring-Club | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 454 | 911 | Paul Fromm | Paul Fromm | DQ |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 455 | 911 T | Dieter Franke | Sixtant-Racing-Team | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 456 | 911 T | Alfred Kunze | Alfred Kunze | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 457 | 911 | Reinhold Ernst | Reinhold Ernst | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 458 | 914/6 | Robert Frostrom | Robert Frostrom | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 459 | 911 | Horst Klauke | Sixtant-Racing-Team | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 463 | 911 S | Helmut Königsdorff | Helmut Köningsdorff | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 465 | 911 Carrera | Heinz-Otto Raufer | Heinz Otto Raufen | 5th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 467 | 911 Carrera | John Rulon-Miller | Mannheim Heidelberg Sports Touring Club | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 469 | 911 S | Horst Kloft | Horst Kloft | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 470 | 911 S | Wilhelm Bartels | Wilhelm Bartels | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 471 | 911 S | Max Müller | FRC Zürich | 4th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 472 | 911 S | Kurt Peter | Kurt Peter | 3rd |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 473 | 911 S | Heinz Grieder | FRC Zürich | 8th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 474 | 911 Carrera | Theo Hofer | Liste Racing-Team | 2nd |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 475 | 911 Carrera RSR 2.8 | Peter Bernhard | FRC Zürich | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 476 | 911 S | Fredy Lienhard | Liste Racing-Team | 9th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 477 | 911 Carrera RSR | Pierre Greub | Pierre Greub | 7th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 478 | 911 Carrera | Hermann Schaffert | FRC Zürich | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 482 | 914/6 | Edgar Dören | Bergischer Motorclub | ?th |
| 6.5.1973 | SM Sembach [SRP] | 519 | 907 | Michel Degoumois | Ecurie La Meute | ?th |
| 6.5.1973 | SM Sembach [SRP] | | 908 | Peter Peters | Peter Peters | ?th |
| 13.5.1973 | Euro GT GP Paris | 1 | 911 Carrera RSR | John Fitzpatrick | Porsche Kremer Racing Team | DNF |
| 13.5.1973 | Euro GT GP Paris | 5 | 911 Carrera RSR | Paul Keller | Porsche Kremer Racing Team | DNF |
| 13.5.1973 | Euro GT GP Paris | 6 | 911 Carrera RS 2.7 | William Vollery | Club Porsche Romand | 8th |
| 13.5.1973 | Euro GT GP Paris | 7 | 911 Carrera RSR 2.8 | Claude Ballot-Léna | Ballot-Lena | 1st |
| 13.5.1973 | Euro GT GP Paris | 8 | 911 Carrera RSR 2.8 | Peter Bernhard | Formel Rennsport Club | raced |
| 13.5.1973 | Targa Florio | 8 | 911 Carrera RSR 2.8 | Müller / van Lennep | Martini Racing | 1st |
| 13.5.1973 | Euro GT GP Paris | 12 | 911 Carrera RS 2.7 | Cyril Grandet | Cyril Grandet | 6th |
| 13.5.1973 | Euro GT GP Paris | 17 | 911 Carrera RS 2.7 | John Rulon-Miller | M.H.S.T.C. e V | 7th |
| 13.5.1973 | Euro GT GP Paris | 19 | 911 Carrera RSR 2.8 | Ennio Bonomelli | Scuderia Brescia Corse | 3rd |
| 13.5.1973 | Euro GT GP Paris | 22 | 911 ST | Guy Gentis | Guy Gentis | 5th |
| 13.5.1973 | Sweden Mantorp Park | 23 | 911 Carrera RSR | Bengt Ekberg | | 1st |
| 13.5.1973 | Euro GT GP Paris | 25 | 911 Carrera RSR | Helmut Henzler | Helmut Henzler | 4th |
| 13.5.1973 | Euro GT GP Paris | 26 | 911 S | Jean-Claude Guérie | Shark Team | raced |
| 13.5.1973 | Euro GT GP Paris | 30 | 911 S | Hans Hargarten | Hans Hargarten | DNA |
| 13.5.1973 | Euro GT GP Paris | 32 | 911 Carrera RSR | Clemens Schickentanz | Oldenkott Racing | 2nd |
| 13.5.1973 | Targa Florio | 106 | 911 Carrera RSR | Borri / Barone | Scuderia Brescia Corse | 7th |
| 13.5.1973 | Targa Florio | 107 | 911 Carrera RSR | Pucci / Steckkönig | Martini Racing | DNQ |
| 13.5.1973 | Targa Florio | 110 | 911 Carrera RS | Hedges / Margulies | Comstock Racing | 18th |
| 13.5.1973 | Targa Florio | 111 | 911 | Radicella / Micangeli | Mario Radicella | DNF |
| 13.5.1973 | Targa Florio | 112 | 911 Carrera RSR 2.8 | Quist / Zink | Max Moritz Racing Team | DNF |
| 13.5.1973 | Targa Florio | 122 | 911 | Pizzo / Serse | | DNA |
| 13.5.1973 | Targa Florio | 123 | 914/6 | Nieri / Fabri | Carlo Fabri | 36th |
| 13.5.1973 | Targa Florio | 124 | 911 ST | Capra / Lepri | Girolama Capra | 12th |
| 13.5.1973 | Targa Florio | 126 | 911 S | Maione / Vigneri | Scuderia Pegaso | DNF |
| 13.5.1973 | Targa Florio | 127 | 914/6 | Mannino / de Gregorio | Giuseppe de Gregorio | 21st |
| 13.5.1973 | Targa Florio | 131 | 911 T | Runfola / Benvenuti | Vittorio Benvenuti | DNF |
| 13.5.1973 | Targa Florio | T | 911 Carrera RS | van Lennep / Müller | Martini Racing | T-car |
| 13.5.1973 | Avus [GT] | | 911 E | Jörg Bornhöft | vcb Berlin | ?th |
| 13.5.1973 | Avus [GT] | | 911 T | Klaus Herig | vcb Berlin | ?th |
| 13.5.1973 | Avus [GT] | | 911 S | Jürgen Krzikalla | Scuderia Avus | 2nd |
| 13.5.1973 | Euro GT GP Paris | | | | | raced |
| 13.5.1973 | Avus [GT] | | 911 Carrera | Horst Schreiber | Horst Schreiber | 4th |
| 13.5.1973 | Avus [GT] | | 914/6 | Dieter Bohnhorst | Dieter Bohnhorst | 3rd |
| 13.5.1973 | Avus [GT] | | 911 Carrera RSR 2.8 | Eugen Kiemele | Eugen Kiemele | 1st |
| 13.5.1973 | Avus [GT] | | 911 S | Wilfried Schmitz | Wilfried Schmitz | ?th |
| 13.5.1973 | Avus [GT] | | 911 S | Peter Bulian | Peter Bulian | ?th |
| 13.5.1973 | Avus [GT] | | 911 | Gerd-Heinz Meyer | Gerd Meyer | 5th |