| 4.2.1973 | 24 h Daytona | 6 | #911 360 0307 R3 | Donohue / Follmer | Penske Racing | DNF |
| 4.2.1973 | 24 h Daytona | 59 | #911 360 0328 R4 | Gregg / Haywood | Brumos Porsche | 1st |
| 24.3.1973 | 12 h Sebring | 59 | #911 360 0705 | Gregg / Haywood / Helmick | Dr. Dave Helmick | 1st |
| 31.3.1973 | DARM Nürburgring [GT] | 110 | | John Fitzpatrick | Porsche Kremer Racing Team | DNF |
| 31.3.1973 | DARM Nürburgring [GT] | 112 | #911 360 0185 | Martin Birrane | Crowne Racing Ltd. | 18th |
| 31.3.1973 | DARM Nürburgring [GT] | 118 | | John Rulon-Miller | Mannheim Heidelberger Sports Touring Club | DNA |
| 31.3.1973 | DARM Nürburgring [GT] | 128 | | Heinz-Otto Raufer | Heinz-Otto Raufer | 9th |
| 31.3.1973 | DARM Nürburgring [GT] | 129 | #911 360 0847 | Georg Loos | GELO-Racing-Team | DNS |
| 31.3.1973 | DARM Nürburgring [GT] | 130 | #911 360 0885 | Clemens Schickentanz | Oldernkott Tobacco and Pipes Racing | 25th |
| 31.3.1973 | DARM Nürburgring [GT] | 131 | | Helmut Henzler | Scuderia Lang Verpackungen | DNA |
| 1.4.1973 | 4 h Le Mans | 37 | | Peter Zbinden | Jean Sage | DNS |
| 1.4.1973 | Le Mans Test | 37 | | Zbinden / Sage | Jean Sage | 27th |
| 1.4.1973 | 4 h Le Mans | 62 | #911 360 0686 R7 | van Lennep / Müller | Martini Racing Team | 1st |
| 1.4.1973 | Le Mans Test | 62 | #911 360 0686 R7 | van Lennep / Müller | Martini Racing Team | 5th |
| 1.4.1973 | Le Mans Test | 64 | | | Porsche Kremer Racing Team | DNA |
| 1.4.1973 | 300 km Nürburgring | 110 | | John Fitzpatrick | Porsche Kremer Racing Team | DNF |
| 1.4.1973 | 300 km Nürburgring | 112 | #911 360 0185 | Martin Birrane | Crowne Racing Ltd. | 13th |
| 1.4.1973 | 300 km Nürburgring | 118 | | John Rulon-Miller | Mannheim Heidelberger Sports Touring Club | DNA |
| 1.4.1973 | 300 km Nürburgring | 128 | | Heinz-Otto Raufer | Heinz-Otto Raufer | DNF |
| 1.4.1973 | 300 km Nürburgring | 129 | #911 360 0847 | Georg Loos | GELO-Racing-Team | DNS |
| 1.4.1973 | 300 km Nürburgring | 130 | #911 360 0885 | Clemens Schickentanz | Oldernkott Tobacco and Pipes Racing | 16th |
| 1.4.1973 | 300 km Nürburgring | 131 | | Helmut Henzler | Scuderia Lang Verpackungen | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 101 | #911 360 1329 | Reinhardt Stenzel | Reinhardt Stenzel | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 103 | | Helmut Henzler | Scuderia Lang Verpackungen | 3rd |
| 15.4.1973 | Trans-Am Road Atlanta | 14 | #911 360 0307 R3 | Al Holbert | Holbert's Porsche-Audi | 2nd |
| 15.4.1973 | Trans-Am Road Atlanta | 16 | | George Follmer | | DNA |
| 15.4.1973 | 1000 km Dijon | 27 | | Fitzpatrick / Keller | Porsche Kremer Racing | 10th |
| 21.4.1973 | 3 h Daytona | 70 | #911 360 0601 | Milt Minter | Toad Hall Motor Racing | 44th |
| 25.4.1973 | 1000 km Monza | 82 | #911 360 0974 R8 | Follmer / Schurti | Martini Racing Team | DNF |
| 25.4.1973 | 1000 km Monza | 84 | #911 360 0885 | Schickentanz / Kremer | Porsche Kremer Racing | 8th |
| 25.4.1973 | 1000 km Monza | 85 | | Fitzpatrick / Keller | Porsche Kremer Racing | 12th |
| 25.4.1973 | 1000 km Monza | 86 | #911 360 0185 | Craft / Birrane | Crowne Racing | DNQ |
| 25.4.1973 | 1000 km Monza | 87 | | Sepp Greger | Sepp Greger | DNA |
| 25.4.1973 | 1000 km Monza | 89 | #911 230 1195 | Anton Fischhaber | Anton Fischhaber | DNA |
| 25.4.1973 | 1000 km Monza | 93 | | Carron / Aeschlimann | Wicky Racing Team | DNA |
| 29.4.1973 | DRM Nürburgring Eifelrennen | 6 | #911 360 0885 | Clemens Schickentanz | Oldenkott Pipes and Tobacco Racing | 2nd |
| 29.4.1973 | DRM Nürburgring Eifelrennen | 9 | | Helmut Henzler | Helmut Henzler | DNF |
| 29.4.1973 | Sweden Knutstorp | 25 | | Bengt Ekberg | Team Kubero | DNF |
| 29.4.1973 | Sweden Knutstorp | 30 | | Jan Lundgardh | Team Castrol | DQ |
| 5.5.1973 | Trans-Am Lime Rock | 14 | #911 360 0307 R3 | Al Holbert | Holbert's Porsche-Audi | 3rd |
| 5.5.1973 | Trans-Am Lime Rock | 70 | #911 360 0601 | Milt Minter | Bob Harmon Racing | 1st |
| 6.5.1973 | 1000 km Spa | 45 | #911 360 0847 | Georg Loos | Gelo Racing | DNA |
| 6.5.1973 | 1000 km Spa | 46 | #911 360 0885 | Schickentanz / Fitzpatrick | Oldenkott Tobacco | 14th |
| 6.5.1973 | 1000 km Spa | 47 | | Fitzpatrick / Keller | Auto Kremer | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 477 | | Pierre Greub | Pierre Greub | 7th |
| 13.5.1973 | Euro GT GP Paris | 1 | | John Fitzpatrick | Porsche Kremer Racing Team | DNF |
| 13.5.1973 | Euro GT GP Paris | 4 | | Pierre Greub | Greub | DNA |
| 13.5.1973 | Euro GT GP Paris | 5 | | Paul Keller | Porsche Kremer Racing Team | DNF |
| 13.5.1973 | Euro GT GP Paris | 11 | | Roland Larsson | Team Kubero Racing | DNA |
| 13.5.1973 | Euro GT GP Paris | 21 | #911 360 0185 | Martin Birrane | Crowne Racing Ltd. | DNA |
| 13.5.1973 | Sweden Mantorp Park | 23 | | Bengt Ekberg | | 1st |
| 13.5.1973 | Euro GT GP Paris | 25 | | Helmut Henzler | Helmut Henzler | 4th |
| 13.5.1973 | Euro GT GP Paris | 32 | #911 360 0885 | Clemens Schickentanz | Oldenkott Racing | 2nd |
| 13.5.1973 | Targa Florio | 106 | | Borri / Barone | Scuderia Brescia Corse | 7th |
| 13.5.1973 | Targa Florio | 107 | #911 360 0974 R8 | Pucci / Steckkönig | Martini Racing | DNQ |
| 13.5.1973 | Targa Florio | 107T | #911 360 0002 | Steckkönig / Pucci | Martini Racing | 6th |
| 20.5.1973 | NTK Zandvoort | 81 | | Nico Chiotakis | Team 4711 Sir Irish Moss | 1st |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 212 | | Karl-Heinz Jacoby | Vorhangschienen M. Weiss | DNA |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 214 | | John Russel | John K. Russell | ?th |
| 27.5.1973 | 1000 km Nürburgring | 6 | #911 360 0686 R7 | van Lennep / Müller | Martini Racing/Porsche AG | 5th |
| 27.5.1973 | 1000 km Nürburgring | 49 | #911 230 1195 | Fischhaber / von Bayern | Toni Fischhaber | 14th |
| 27.5.1973 | 1000 km Nürburgring | 50 | #911 360 1045 | Ekberg / Simonsen / Larsson | Team Kubero Racing | 15th |
| 27.5.1973 | 1000 km Nürburgring | 53 | #911 360 1183 | Ziegler / Ziegler | Hanspeter Ziegler | DNS |
| 27.5.1973 | 1000 km Nürburgring | 54 | #911 360 0885 | Schickentanz / Keller / Steckkönig | Oldenkott Tobacco and Pipes Racing | 12th |
| 27.5.1973 | 1000 km Nürburgring | 55 | | Keller / Schickentanz / Neuhaus | Porsche Kremer Racing Team | 11th |
| 27.5.1973 | 1000 km Nürburgring | 56 | | | Porsche Kremer Racing Team | DNA |
| 27.5.1973 | 1000 km Nürburgring | 59 | #911 360 0847 | Barth / Loos | Gelo Racing Team | 13th |
| 27.5.1973 | 1000 km Nürburgring | 60 | #911 360 1099 | Bolanos / Nicastro | Juan C. Bolanos | DNF |
| 2.6.1973 | Euro GT Imola | 83 | | Helmut Henzler | | 5th |
| 2.6.1973 | Euro GT Imola | 84 | #911 360 0185 | Martin Birrane | | DNA |
| 2.6.1973 | Euro GT Imola | 86 | | Paul Keller | | DNA |
| 2.6.1973 | Euro GT Imola | 87 | #911 360 0885 | Clemens Schickentanz | Porsche Kremer Racing | 2nd |
| 2.6.1973 | Euro GT Imola | 88 | | Bengt Ekberg | | DNA |
| 2.6.1973 | Euro GT Imola | 89 | #911 360 1045 | Roland Larsson | Team Kubero | 13th |
| 2.6.1973 | Euro GT Imola | 91 | | Bernard Chenevière | | 22nd |
| 2.6.1973 | Euro GT Imola | 93 | | William Vollery | | 8th |
| 2.6.1973 | Euro GT Imola | 94 | | Giovanni Borri | | 16th |
| 10.6.1973 | 500 mile Pocono | 9 | #911 360 0386 | Harry Bytzek | Bytzek Automotive | 31st |
| 10.6.1973 | 24 h Le Mans | 32 | | Wicky / Rousselot / Foucault | Wicky Racing Team | DNA |
| 10.6.1973 | 24 h Le Mans | 45 | | Keller / Schickentanz / Kremer | Porsche Kremer Racing Team | 8th |
| 10.6.1973 | 24 h Le Mans | 46 | #911 360 0686 R7 | van Lennep / Müller | Porsche System Engineering Ltd. | 4th |
| 10.6.1973 | 24 h Le Mans | 48 | | Haldi / Koinigg | Porsche System Engineering Ltd. | DNA |
| 10.6.1973 | 24 h Le Mans | 63 | #911 360 0847 | Loos / Barth | Gelo Racing Team | 10th |
| 10.6.1973 | 24 h Le Mans | 64 | | Clark / Juncadella / Hanson | Racing With Montjuich Tergal | DNA |
| 10.6.1973 | 500 mile Pocono | 76 | #911 360 0785 | Stone / Downs | Silverstone Racing Team | 4th |
| 10.6.1973 | 24 h Le Mans | 76 | | Haldi / Blank | Claude Haldi | DNA |
| 10.6.1973 | 24 h Le Mans | 77 | #911 360 0185 | Craft / Birrane | Crowne Racing | DNA |
| 10.6.1973 | 24 h Le Mans | 78 | #911 360 0960 | Bayard / Ligonnet | Jean Sage | DNF |
| 10.6.1973 | NTK Zandvoort | 81 | | Nico Chiotakis | Team 4711 Sir Irish Moss | DNF |
| 16.6.1973 | Trans-Am Watkins Glen | 14 | #911 360 0307 R3 | Holbert / Donohue | Holbert's Porsche-Audi, Inc. | 8th |
| 16.6.1973 | Trans-Am Watkins Glen | 70 | #911 360 0601 | Milt Minter | Bob Harmon Racing | 28th |
| 16.6.1973 | Trans-Am Watkins Glen | 76 | #911 360 0785 | Stone / Downs | Silverstone Racing | DNS |
| 17.6.1973 | Anderstorp [T/GT] | 22 | | Bengt Ekberg | Team Kubero | DNA |
| 17.6.1973 | Anderstorp [T/GT] | 23 | | Simonsen | Team Kubero | 6th |
| 17.6.1973 | Anderstorp [T/GT] | 24 | | Jan Lundgardh | Team Castrol | DNA |
| 17.6.1973 | Hockenheim [GT] | | | John Rulon-Miller | | 4th |
| 17.6.1973 | Hockenheim [GT] | | | Helmut Henzler | | 3rd |
| 24.6.1973 | Euro GT Nivelles | 16 | | Nico Chiotakis | Team 4711 Sir Ir. Moss | DNA |
| 24.6.1973 | Euro GT Nivelles | 22 | | Jan Lundgardh | Team Castrol | DNA |