| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 454 | | Paul Fromm | Paul Fromm | DQ |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 455 | | Dieter Franke | Sixtant-Racing-Team | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 456 | | Alfred Kunze | Alfred Kunze | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 457 | | Reinhold Ernst | Reinhold Ernst | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 459 | #13448 | Horst Klauke | Sixtant-Racing-Team | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 463 | | Helmut Königsdorff | Helmut Köningsdorff | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 469 | | Horst Kloft | Horst Kloft | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 470 | #911 230 0987 | Wilhelm Bartels | Wilhelm Bartels | DNA |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 471 | | Max Müller | FRC Zürich | 4th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 472 | | Kurt Peter | Kurt Peter | 3rd |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 473 | #911 230 1417 | Heinz Grieder | FRC Zürich | 8th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 476 | | Fredy Lienhard | Liste Racing-Team | 9th |
| 13.5.1973 | Euro GT GP Paris | 14 | #119 12 xxxx# | Horst Klauke | Sixtant Racing Team | DNA |
| 13.5.1973 | Euro GT GP Paris | 20 | #911 030 1016 | | Porsche Club Romand | 10th |
| 13.5.1973 | Euro GT GP Paris | 22 | #911 020 0699 | Guy Gentis | Guy Gentis | 5th |
| 13.5.1973 | Euro GT GP Paris | 24 | | Dominique Bardini | "Bardini" | DNA |
| 13.5.1973 | Euro GT GP Paris | 26 | #911 030 1003 | Jean-Claude Guérie | Shark Team | raced |
| 13.5.1973 | Euro GT GP Paris | 30 | | Hans Hargarten | Hans Hargarten | DNA |
| 13.5.1973 | Targa Florio | 109 | | Fossati / Mola | Guido Fossati | 14th |
| 13.5.1973 | Targa Florio | 111 | | Radicella / Micangeli | Mario Radicella | DNF |
| 13.5.1973 | Targa Florio | 114 | #119 30 1155 | Patania / "Carab" | Salvatore Patamia | DNF |
| 13.5.1973 | Targa Florio | 122 | | Pizzo / Serse | | DNA |
| 13.5.1973 | Targa Florio | 124 | #911 130 0721 | Capra / Lepri | Girolama Capra | 12th |
| 13.5.1973 | Targa Florio | 126 | | Maione / Vigneri | Scuderia Pegaso | DNF |
| 13.5.1973 | Targa Florio | 131 | | Runfola / Benvenuti | Vittorio Benvenuti | DNF |
| 13.5.1973 | Avus [GT] | | | Jörg Bornhöft | vcb Berlin | ?th |
| 13.5.1973 | Avus [GT] | | #911 030 1007 | Wilfried Schmitz | Wilfried Schmitz | ?th |
| 13.5.1973 | Avus [GT] | | | Klaus Herig | vcb Berlin | ?th |
| 13.5.1973 | Avus [GT] | | | Peter Bulian | Peter Bulian | ?th |
| 13.5.1973 | Avus [GT] | | | Jürgen Krzikalla | Scuderia Avus | 2nd |
| 13.5.1973 | Avus [GT] | | | Gerd-Heinz Meyer | Gerd Meyer | 5th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 201 | | Alfred Kunze | Alfred Kunze | DNA |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 203 | | Peter Ehlert | Sixtant-Racing Team | ?th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 204 | | Dieter Franke | Dieter Franke | ?th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 205 | | Harald Grohs | Harald Grohs | DNF |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 208 | | Manfred Sommer | Manfred Sommer | ?th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 209 | #119 12 xxxx# | Horst Klauke | Braun-Sixtand R.T. | DNA |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 211 | | Walter aus der Au | Mascotte Racing Team | ?th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 213 | | Horst Kloft | Horst Kloft | 3rd |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 215 | #911 230 0987 | Heinz-Jörgen Dahmen | Heinz-Jörg Dahmen | DNA |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 220 | | Max Müller | FRC Zürich | 7th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 222 | #911 230 1417 | Heinz Grieder | FRC Zürich | 5th |
| 20.5.1973 | DARM Salzburgring | | | Alfred Kunze | Alfred Kunze | ?th |
| 20.5.1973 | DARM Salzburgring | | | Helmut Königsdorff | Helmut Köningsdorff | 5th |
| 20.5.1973 | DARM Salzburgring | | | Thomas Datzmann | Thomas Datzmann | 3rd |
| 20.5.1973 | DARM Salzburgring | | | Willy Rabl | Wilhelm Rabl | ?th |
| 20.5.1973 | DARM Salzburgring | | | Hans Hargarten | Hans Hargarten | ?th |
| 20.5.1973 | DARM Salzburgring | | | Peter Paradeiser | Peter Paradeiser | ?th |
| 20.5.1973 | La Châtre [GT] | | | Jean-Louis Chateau | | 1st |
| 27.5.1973 | Dalsland [T+1.3/GT3.0] | 17 | | Kenneth Leim | Team Blå | DNA |
| 27.5.1973 | 1000 km Nürburgring | 51 | | Wagner / Babendererde | Lothar Wagner | 19th |
| 27.5.1973 | 1000 km Nürburgring | 62 | #119 12 xxxx# | Schimpf / Klauke / Rieder | Team Europa-Möbel | DNF |
| 27.5.1973 | Coppa AGIP Monza [GT+1.6] | | | Capra | | 6th |
| 27.5.1973 | Croix-en-Ternois [GT] | | | Kirschoffer | | 4th |
| 27.5.1973 | Coppa AGIP Monza [GT+1.6] | | | Rovida | | 7th |
| 27.5.1973 | Croix-en-Ternois [ser.GT] | | | Méo | | 2nd |
| 27.5.1973 | Croix-en-Ternois [GT] | | | Chateau | | 1st |
| 2.6.1973 | Euro GT Imola | 61 | | Silvano Frisori | | DNA |
| 2.6.1973 | Euro GT Imola | 69 | #911 030 1016 | Jean-Marc Guignard | | DNA |
| 2.6.1973 | Euro GT Imola | 70 | | Vittorio Benvenuti | | DNA |
| 3.6.1973 | Nivelles [GT] | | #002 0024 | Ernst Zupp | Ernst Zupp | 1st |
| 3.6.1973 | Nivelles [GT] | | | Barrano Luigi | Barrano Luigi | DNF |
| 3.6.1973 | Nivelles [GT] | | | Harald Grohs | Harald Grohs | ?th |
| 3.6.1973 | Nivelles [GT] | | | Horst Sasse | Hasselbecker-Racing Team | 2nd |
| 10.6.1973 | 500 mile Pocono | 00 | #911 230 0538 | Lindley / Goellnicht | Don Lindley | 10th |
| 10.6.1973 | 500 mile Pocono | 6 | | Wachs / Dickinson | G. W. Dickinson | 8th |
| 10.6.1973 | 500 mile Pocono | 12 | | Peter Kirill | | 37th |
| 10.6.1973 | 500 mile Pocono | 22 | | Richard Weiss | | 43rd |
| 10.6.1973 | 24 h Le Mans | 41 | #911 230 0872 | Selz / Vetsch | Schiller Racing Team | 16th |
| 10.6.1973 | 500 mile Pocono | 62 | #119 22 0830 | Bergstrom / Cook | Bob Bergstrom | 6th |
| 10.6.1973 | 500 mile Pocono | 74 | #911 230 0934 | Heimrath / Hill | Ludwig Heimrath | 18th |
| 10.6.1973 | 24 h Le Mans | 75 | #911 030 1003 | Greub / Keller | Porsche Club Romand | DNQ |
| 10.6.1973 | 500 mile Pocono | 77 | #119 30 0434 | Jennings / Beasley | Bruce Jennings | 9th |
| 10.6.1973 | 24 h Le Mans | 80 | | Buchet / Thiry / Agére | Claude Buchet | DNA |
| 10.6.1973 | 500 mile Pocono | 86 | #911 012 1866 | Jim Lynch | James Lynch | 49th |
| 10.6.1973 | 500 mile Pocono | 89 | | Dave Causey | Thomas Barrick | 45th |
| 10.6.1973 | 500 mile Pocono | 91 | | Mike Tillson | Holbert's Porsche-Audi | 23rd |
| 10.6.1973 | 500 mile Pocono | 92 | #911 012 2139 | Oest / Tillson / Olimpi | Holbert's Porsche-Audi | 12th |
| 10.6.1973 | 500 mile Pocono | 97 | #308 299 | Niederer / Larkin | | 22nd |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | #002 0024 | Ernst Zupp | Ernst Zupp | 5th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Gerhard Holup | Gerhard Holup | 8th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Horst Kloft | Horst Kloft | 2nd |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Horst Sasse | Hasselbecker-Racing Team | 3rd |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Peter Bulian | Peter Bulian | ?th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Luigi Barrano | Luigi Barrano | ?th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Bernd Renneisen | Bernd Brenneisen | ?th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Hans Hargarten | Hans Hargarten | ?th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Harald Grohs | Harald Grohs | ?th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Peter Sieben | Rheydter Club für Motorsport | ?th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | #911 230 0987 | Heinz-Jörgen Dahmen | Porsche-Tebernum | 10th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | | Hans-Peter Joisten | Oldenkott Tobacco and Pipes Racing | DNF |
| 16.6.1973 | Trans-Am Watkins Glen | 6 | | Wachs / Dickinson | Palatine Automotive | DNA |
| 16.6.1973 | Trans-Am Watkins Glen | 61 | | Sieg Glage | Sieg Glage | DNS |
| 16.6.1973 | Trans-Am Watkins Glen | 62 | #119 22 0830 | Bob Bergstrom | Bob Bergstrom | 13th |
| 16.6.1973 | Trans-Am Watkins Glen | 74 | #911 230 0934 | Ludwig Heimrath | Ludwig Heimrath | 5th |
| 16.6.1973 | Trans-Am Watkins Glen | 90 | #911 230 1222 | Marc Dancose | Marc Dancose | DNA |
| 16.6.1973 | Trans-Am Watkins Glen | 92 | #911 012 2139 | Dieter Oest | Holbert's Porsche-Audi | 21st |
| 16.6.1973 | Trans-Am Watkins Glen | 93 | | Mike Tillson | Holbert's Porsche-Audi | 33rd |
| 17.6.1973 | Anderstorp [T/GT] | 25 | | Lennart Winkvist | Team Castrol | DNA |
| 17.6.1973 | Anderstorp [T/GT] | 26 | | Kent Frohde | Scheel – Bilstolar Sten & Kent Frohde | DNA |