| 8.7.1973 | Euro GT Estoril | 9 | | John Rulon-Miller | MHSCC | 9th |
| 8.7.1973 | Euro GT Estoril | 12 | #911 360 1088 | Charles Geeraerts | Royal Air Maroc | DNF |
| 8.7.1973 | Euro GT Estoril | 17 | | Roland Larsson | Team Kubero | 8th |
| 8.7.1973 | DARM Niederstetten | 189? | | Heinz-Otto Raufer | Heinz Otto Raufer | 1st |
| 8.7.1973 | Niederstetten [GT CH] | | | Theo Hofer | | 3rd |
| 8.7.1973 | Niederstetten [GT CH] | | #911 250 0335 | Kurt Peter | | 2nd |
| 8.7.1973 | DARM Niederstetten | | | Hans Hinze | Hans Hinze | 5th |
| 8.7.1973 | DARM Niederstetten | | #911 230 0818 | Eberhard Sindel | Rallyegemeinschaft Ulm | 2nd |
| 8.7.1973 | Niederstetten [GT CH] | | | Fredy Lienhard | | 1st |
| 8.7.1973 | DARM Niederstetten | | #911 360 0894 | Eugen Kiemele | Eugen Kiemele | DNF |
| 8.7.1973 | DARM Niederstetten | | #911 360 0636 | Rolf Göring | Autohaus Max Moritz | 3rd |
| 15.7.1973 | 6 h Mid-Ohio | 1 | #911 360 0755 | Keyser / Beasley | Toad Hall Motor Racing | 1st |
| 15.7.1973 | 6 h Mid-Ohio | 9 | #911 360 0386 | Bytzek / Bytzek | Bytzek Automotive | 7th |
| 15.7.1973 | Trans-Am Sanair | 14 | #911 360 0307 R3 | Al Holbert | Holbert's Porsche-Audi | 4th |
| 15.7.1973 | Sweden Falkenberg | 25 | | Bengt Ekberg | Team Kubero Porsche Racing | 3rd |
| 15.7.1973 | Sweden Falkenberg | 30 | | Jan Lundgardh | Team Castrol | 4th |
| 15.7.1973 | 6 h Mid-Ohio | 43 | #911 360 0915 | O'Steen / Graves / Helmick | Ecurie Escargot | 4th |
| 15.7.1973 | Trans-Am Sanair | 59 | #911 360 0727 | Peter Gregg | Brumos Porsche-Audi Corp. | 6th |
| 15.7.1973 | Trans-Am Sanair | 70 | #911 360 0601 | Milt Minter | Bob Harmon Racing | 23rd |
| 15.7.1973 | DRM Diepholz | 104 | #911 360 0885 | Clemens Schickentanz | Oldenkott Pipes and Tobacco Racing | 3rd |
| 15.7.1973 | DRM Diepholz | 111 | | Rolf Stommelen | Porsche Kremer-Racing Team | 1st |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | #911 230 0827 | Peter Bernhard | | ?th |
| 15.7.1973 | DRM Diepholz | | #911 360 0791 | Richard Leder | Richard Leder | 14th |
| 15.7.1973 | DRM Diepholz | | | Josef Brambring | Porsche-Kremer-Racing Team | DNS |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | | Heinz-Otto Raufer | Porsche Club, Nürnberg | ?th |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | #911 250 0335 | Kurt Peter | | ?th |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | #911 230 0818 | Eberhard Sindel | Rallyegemeinschaft Ulm | ?th |
| 15.7.1973 | Trans-Am Sanair | | #911 360 0785 | Mike Downs | Silverstone Ent. | 5th |
| 15.7.1973 | Diepholz [GT+2.0} | | | Claus Dathner-Diercks | Claus Dathner-Diercks | ?th |
| 15.7.1973 | Diepholz [GT+2.0} | | | Claus Dathner-Diercks | Claus Dathner-Diercks | 4th |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | #911 230 1195 | Anton Fischhaber | Toni Fischhaber | 3rd |
| 15.7.1973 | Diepholz [GT+2.0} | | | Josef Brambring | Porsche-Kremer-Racing Team | ?th |
| 15.7.1973 | DRM Diepholz | | #911 360 0921 | Günter Steckkönig | M. Weißmann Vorhangschienen | 5th |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | #911 360 0894 | Eugen Kiemele | Eugen Kiemele | 4th |
| 15.7.1973 | DRM Diepholz | | #911 360 1045 | Kurt Simonsen | | 9th |
| 15.7.1973 | DRM Diepholz | | #911 360 0659 | Claude Haldi | | 6th |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | #911 360 1329 | Reinhardt Stenzel | Auto-Fox-Racing | 2nd |
| 21.7.1973 | 6 h Watkins Glen | 6 | #911 360 0588 R6 | Donohue / Follmer | Roger Penske Enterprises | 6th |
| 21.7.1973 | 6 h Watkins Glen | 14 | #911 360 0307 R3 | Holbert / McComb | Holbert's Porsche-Audi | DNF |
| 21.7.1973 | 6 h Watkins Glen | 16 | #911 360 0755 | Keyser / Minter | Toad Hall Motor Racing | 8th |
| 21.7.1973 | 6 h Watkins Glen | 43 | #911 360 0915 | Helmick / O'Steen | Ecurie Escargot | 12th |
| 21.7.1973 | 6 h Watkins Glen | 58 | #911 360 0865 | Rebaque / Rojas | Brumos Porsche-Audi Corp. | DNA |
| 21.7.1973 | 6 h Watkins Glen | 59 | #911 360 0686 R7 | Gregg / Haywood | Brumos Porsche-Audi Corp. | 7th |
| 21.7.1973 | 6 h Watkins Glen | 65 | #911 360 0701 | Loomis / Harrison | Gregg Loomis | DNF |
| 21.7.1973 | 6 h Watkins Glen | 70 | #911 360 0601 | Minter / Harmon | Bob Harmon Racing | DNF |
| 21.7.1973 | 6 h Watkins Glen | 76 | #911 360 0785 | Downs / Kelly | Silverstone Enterprises | DNS |
| 21.7.1973 | 6 h Watkins Glen | 81 | #911 360 0756 | Egerton / Forbes-Robinson | Pharr West Racing | 11th |
| 22.7.1973 | Can-Am Watkins Glen | 58 | #911 360 0686 R7 | Peter Gregg | Brumos Racing | 9th |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 214 | | Klaus Herig | Vereinigung Berliner e.V. Automobilsportler | 9th |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 215 | | Edy Welti | Formel Rennsport Club | 5th |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 216 | | Edi Kofel | Mascotte Racing Team | DNA |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 217 | | Sidney Charpilloz | Ecurie Biennoise | 4th |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 218 | | Peter Ditzler | Blank Racing Team | 6th |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 220 | | Friedrich Straumann | Ecurie Basilisk | 1st |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 221 | | Jean von Kaenel | Formel Rennsport Club | 8th |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 222 | | Ernst Brühweiler | Ecurie Basilisk | 11th |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 223 | | Martin Brühweiler | Martin Brühweiler | 12th |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 224 | | Peter Zbinden | Scuderia Basilea | 2nd |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 225 | | Theo Hofer | Lista Racing Team | 3rd |
| 22.7.1973 | SM Hockenheim [GT1.6/Gr.3/S1.0] | 226 | | André Stuckelberger | André Stuckelberger | 13th |
| 22.7.1973 | SM Hockenheim [S+1.6/GT+2.0] | 334 | #911 360 0791 | Richard Leder | Richard Leder | ?th |
| 22.7.1973 | SM Hockenheim [S+1.6/GT+2.0] | 337 | #911 250 0335 | Kurt Peter | Formel-Rennsportclub | ?th |
| 22.7.1973 | SM Hockenheim [S+1.6/GT+2.0] | 338 | #911 360 0871 | Karl Foitek | Karl Foitek | ?th |
| 22.7.1973 | SM Hockenheim [S+1.6/GT+2.0] | 339 | #911 230 0827 | Peter Bernhard | Peter Bernhard | DNF |
| 22.7.1973 | SM Hockenheim [S+1.6/GT+2.0] | 340 | #911 360 0837 | Fredy Lienhard | Lista Racing-Team | ?th |
| 22.7.1973 | SM Hockenheim [S+1.6/GT+2.0] | 344 | #911 360 0894 | Eugen Kiemele | Eugen Kiemele | ?th |
| 22.7.1973 | SM Hockenheim [S+1.6/GT+2.0] | 346 | | Josef Brambring | Josef Brambring | ?th |
| 28.7.1973 | Trans-Am Road America | 9 | | Bob Hagestad | Bob Hagestad | 23rd |
| 28.7.1973 | Trans-Am Road America | 14 | #911 360 0307 R3 | Al Holbert | Holbert's Porsche Audi, Inc. | 3rd |
| 28.7.1973 | Trans-Am Road America | 42 | #911 360 0915 | John O'Steen | Ecurie Escargot | 21st |
| 28.7.1973 | Trans-Am Road America | 59 | #911 360 0727 | Peter Gregg | Brumos Porsche Audi Corp. | 29th |
| 28.7.1973 | Trans-Am Road America | 70 | #911 360 0601 | Milt Minter | Bob Harmon Racing | 5th |
| 28.7.1973 | Trans-Am Road America | 81 | #911 360 0756 | Grey Egerton | Pharr West Racing | DNA |
| 28.7.1973 | Trans-Am Road America | | | Elliot Forbes-Robinson | Pharr Yarks | 4th |
| 29.7.1973 | NTK Zandvoort | 81 | | Nico Chiotakis | Team 4711 Sir Irish Moss | 2nd |
| 5.8.1973 | DRM Nürburgring GP | 5 | #911 360 0921 | Günter Steckkönig | Manfred Weißmann | 3rd |
| 5.8.1973 | DRM Nürburgring GP | 15 | #911 230 0827 | Peter Bernhard | FRC | DNF |
| 5.8.1973 | Euro GT Thruxton | 15 | #911 360 0643 | Claude Ballot-Léna | Sonauto | 1st |
| 5.8.1973 | DRM Nürburgring GP | 16 | #911 230 0818 | Eberhard Sindel | Rallyegemeinschaft Ulm | DNF |
| 5.8.1973 | DRM Nürburgring GP | 19 | #911 360 1183 | Hans-Peter Ziegler | Hans-Peter Ziegler | 13th |
| 5.8.1973 | DRM Nürburgring GP | 21 | #911 360 0909 | Karl-Josef Römer | Karl-Josef Römer | 19th |
| 5.8.1973 | DRM Nürburgring GP | 22 | | Eckard Babendererde | Eckard Babendererde | DNA |
| 5.8.1973 | Euro GT Thruxton | 29 | #911 360 0659 | Claude Haldi | Porsche Club Romand | 2nd |
| 5.8.1973 | Euro GT Thruxton | 33 | #911 360 0885 | Clemens Schickentanz | Porsche Kremer Racing | 3rd |
| 5.8.1973 | Euro GT Thruxton | 35 | #911 360 1088 | Charles Geeraerts | Royal Air Maroc | 9th |
| 5.8.1973 | Euro GT Thruxton | 38 | | Paul Keller | Porsche Kremer Racing | 4th |
| 5.8.1973 | SCCA Riverside Copa Turismo | | #911 360 0614 | Diego Febles | | 1st |
| 5.8.1973 | Euro GT Thruxton | | | Kurt Simonsen | | 5th |
| 5.8.1973 | Euro GT Thruxton | | #911 360 0185 | Martin Birrane | | raced |
| 5.8.1973 | Euro GT Thruxton | | #911 360 0894 | Eugen Kiemele | Eugen Kiemele | 8th |
| 5.8.1973 | Euro GT Thruxton | | | Bernard Chenevière | Porsche Club Romand | 6th |
| 5.8.1973 | Euro GT Thruxton | | | William Vollery | | 7th |
| 5.8.1973 | Euro GT Thruxton | | | Roland Larsson | | DNS |
| 5.8.1973 | Euro GT Thruxton | | | Helmut Henzler | | DNS |
| 5.8.1973 | Euro GT Thruxton | | #911 360 0847 | Georg Loos | Gelo Racing Team | raced |
| 5.8.1973 | Euro GT Thruxton | | #002 0005 | Ennio Bonomelli | Ennio Bonomelli | raced |
| 5.8.1973 | Euro GT Thruxton | | #911 360 1045 | Bengt Ekberg | Team Kubero | raced |
| 12.8.1973 | Karlskoga [T+1.3/GT3.0] | 16 | | Jan Lundgardh | Team Castrol | 6th |
| 12.8.1973 | Karlskoga [T+1.3/GT3.0] | 29 | | Bengt Ekberg | Team Kybero-Porsche | 2nd |
| 12.8.1973 | Hessen Hockenheim [GT] | | #911 360 0894 | Eugen Kiemele | Eugen Kiemele | 1st |