| 4.2.1973 | 24 h Daytona | 38 | | Muniz / Quintanilla | Quintanilla/Muniz | 19th |
| 24.3.1973 | 12 h Sebring | 65 | | Cutler / Kirill | Lee Cutler | DNS |
| 24.3.1973 | 12 h Sebring | 67 | #914 043 1262 | McClain / White | David H. McClain | 23rd |
| 24.3.1973 | 12 h Sebring | 85 | | Parish / Jones / Hulen | Donald Parish | 30th |
| 25.3.1973 | 6 h Vallelunga | 24 | | La Starza / Bruschi | P. La Starza | DNQ |
| 25.3.1973 | DARM Zolder [GT+1.6] | 228 | #914 043 0165 | Edgar Dören | Bergischer Motorclub | ?th |
| 25.3.1973 | DARM Zolder [GT+1.6] | 230 | | Hubert Engbert | Hubert Engbert | DNA |
| 25.3.1973 | DARM Zolder [GT+1.6] | 231 | | Jochen Engel | Mannheim-Heidelberg Sport-Turing-Club | DNF |
| 25.3.1973 | DARM Zolder [GT+1.6] | 236 | | Hans Christian Jürgensen | Hans Christian Jürgensen | DNA |
| 25.3.1973 | DARM Zolder [GT+1.6] | 238 | | Peter Karl Nowak | Braun Sixtant Racing Team | ?th |
| 25.3.1973 | DARM Zolder [GT+1.6] | 239 | | Lothar Ohren | Rheydter Club für Motorsport | ?th |
| 25.3.1973 | DARM Zolder [GT+1.6] | | | Werner Christmann | Werner Christmann | ?th |
| 31.3.1973 | DARM Nürburgring [GT] | 141 | #914 043 0163 | Günter Steckkönig | Günter Steckkönig | DNA |
| 31.3.1973 | DARM Nürburgring [GT] | 143 | #914 043 0165 | Edgar Dören | Bergischer Motor Club e.V. im ADAC | 11th |
| 31.3.1973 | DARM Nürburgring [GT] | 145 | #914 043 0032 | Jean Canonica | Porsche Club Romand | DNA |
| 31.3.1973 | DARM Nürburgring [GT] | 147 | | Hans Christian Jürgensen | Hans Christian Jürgensen | DNA |
| 31.3.1973 | DARM Nürburgring [GT] | 149 | #914 043 1415 | Jochen Engel | Mannheim Heidelberger Sports Touring Club | 13th |
| 31.3.1973 | DARM Nürburgring [GT] | 154 | #914 043 0251 | Lothar Ohren | Lothar Ohren | 21st |
| 31.3.1973 | DARM Nürburgring [GT] | 155 | #914 143 0306 | Werner Christmann | Werner Christmann | 6th |
| 1.4.1973 | 300 km Nürburgring | 141 | #914 043 0163 | Günter Steckkönig | Günter Steckkönig | DNA |
| 1.4.1973 | 300 km Nürburgring | 143 | #914 043 0165 | Edgar Dören | Bergischer Motor Club e.V. im ADAC | 8th |
| 1.4.1973 | 300 km Nürburgring | 145 | #914 043 0032 | Jean Canonica | Porsche Club Romand | DNA |
| 1.4.1973 | 300 km Nürburgring | 147 | | Hans Christian Jürgensen | Hans Christian Jürgensen | DNA |
| 1.4.1973 | 300 km Nürburgring | 149 | #914 043 1415 | Jochen Engel | Mannheim Heidelberger Sports Touring Club | DNF |
| 1.4.1973 | 300 km Nürburgring | 154 | #914 043 0251 | Lothar Ohren | Lothar Ohren | 17th |
| 1.4.1973 | 300 km Nürburgring | 155 | #914 143 0306 | Werner Christmann | Werner Christmann | 6th |
| 8.4.1973 | Hockenheim [GT/T] | 125 | | Hans Christian Jürgensen | Hans Christian Jürgensen | DNF |
| 8.4.1973 | Hockenheim [GT/T] | 127 | | "Ronald Knudel" | HMSTC | ?th |
| 8.4.1973 | Hockenheim [GT/T] | 130 | | Peter Karl Nowak | Peter-Karl Nowak | ?th |
| 8.4.1973 | Zolder [GT/T] | | | Karl-Heinz Schrey | Karl-Heinz Schrey | 1st |
| 15.4.1973 | 60 mile Zolder | | | Hans Christian Jürgensen | Hans Christian Jürgensen | ?th |
| 21.4.1973 | 3 h Daytona | 55 | | Lee Cutler | | 45th |
| 22.4.1973 | DARM Zolder [GT] | | | Lothar Ohren | Rheydter Club für Motorsport | DNF |
| 22.4.1973 | DARM Zolder [GT] | | | Hans Christian Jürgensen | Hans Christian Jürgensen | DNF |
| 22.4.1973 | DARM Zolder [GT] | | | Werner Christmann | Werner Christmann | ?th |
| 22.4.1973 | DARM Zolder [GT] | | #914 043 0165 | Edgar Dören | Bergischer Motorclub | ?th |
| 22.4.1973 | DARM Zolder [GT] | | | Jochen Engel | MHSTC | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 451 | | Peter Karl Nowak | Sixtant-Racing-Team | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 452 | | Hans Christian Jürgensen | Hans Christian Jürgensen | DQ |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 453 | | Jochen Engel | Mannheim-Heidelberg Sports-Touring-Club | DNF |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 458 | | Robert Frostrom | Robert Frostrom | ?th |
| 6.5.1973 | DARM Sembach [GT+1.6/Gr.3 +2.0] | 482 | #914 043 0165 | Edgar Dören | Bergischer Motorclub | ?th |
| 13.5.1973 | Euro GT GP Paris | 9 | | Eckhard Schimpf | Eckhard Schimpf | DNA |
| 13.5.1973 | Euro GT GP Paris | 10 | | Werner Christmann | Werner Christmann | DNA |
| 13.5.1973 | Targa Florio | 123 | | Nieri / Fabri | Carlo Fabri | 36th |
| 13.5.1973 | Targa Florio | 127 | | Mannino / de Gregorio | Giuseppe de Gregorio | 21st |
| 13.5.1973 | Avus [GT] | | #914 043 1034 | Dieter Bohnhorst | Dieter Bohnhorst | 3rd |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 200 | | Horst Godel | sixtant-Racing Team | ?th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 202 | | Eckhard Schimpf | Jägermeister-Racing Team | 14th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 206 | | Lothar Ohren | Lothar Ohren | ?th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 207 | | Robert Frostrom | Robert J. Frostrom | ?th |
| 20.5.1973 | SM Hockenheim [GT+1.6/T+2.0] | 210 | | Hans Stähli | FRC Zürich | ?th |
| 20.5.1973 | DARM Salzburgring | | #914 043 0165 | Edgar Dören | Bergischer Motorclub | ?th |
| 27.5.1973 | 1000 km Nürburgring | 63 | #914 043 0674 | Greger / Hild | Vereinigung Süddeutscher Automobilsportler | DNA |
| 27.5.1973 | 1000 km Nürburgring | 65 | #914 143 0306 | Christmann / Hinse | Werner Christmann | DNS |
| 2.6.1973 | Euro GT Imola | 64 | | Elvio Maria Zanini | | DNA |
| 2.6.1973 | Euro GT Imola | 65 | | Emilio Pegger | | DNA |
| 2.6.1973 | Euro GT Imola | 67 | | Carlo Fabri | | 20th |
| 2.6.1973 | Euro GT Imola | 68 | | "Tambauto" | | DNA |
| 3.6.1973 | Nivelles [GT] | | | Lothar Ohren | Lothar Ohren | ?th |
| 10.6.1973 | Rhein-Ruhr Zolder [GT] | | #914 043 0165 | Edgar Dören | Bergischer Motorclub | ?th |
| 17.6.1973 | Hockenheim [GT] | | | Robert Frostrom | | ?th |
| 17.6.1973 | Hockenheim [GT] | | | Alfred Kunze | | raced |
| 17.6.1973 | Hockenheim [GT] | | | Jochen Engel | | DNF |
| 17.6.1973 | Hockenheim [GT] | | | Peter Karl Nowak | | ?th |
| 17.6.1973 | Zolder [GT] | | | Werner Christmann | Werner Christmann | ?th |
| 24.6.1973 | Euro GT Nivelles | 7 | | Marc Demol | Ecurie Toison d'Or | DNA |
| 24.6.1973 | Euro GT Nivelles | 8 | | Eckhard Schimpf | Schimpf | DNA |
| 1.7.1973 | Avus [GT+1.6] | 20 | | Roland Bauer | Roland Bauer | DNF |
| 1.7.1973 | Avus [GT+1.6] | 21 | | Eckhard Schimpf | Eckhard Schimpf | 5th |
| 1.7.1973 | Avus [GT+1.6] | 23 | | Hans Christian Jürgensen | Hans Christian Jürgensen | 4th |
| 1.7.1973 | Avus [GT+1.6] | 25 | | Hubert Schlieckmann | H. Schliemann | DNF |
| 1.7.1973 | DRM Mainz-Finthen | 44 | | Horst Godel | Sixtant Racing Team | DNF |
| 4.7.1973 | 250 mile Daytona Paul Revere | 67 | #914 043 1262 | McClain / White | David H. McClain | 35th |
| 8.7.1973 | Niederstetten [GT CH] | | | Hans Stähli | | ?th |
| 8.7.1973 | DARM Niederstetten | | | Walter Bauer | Autohaus Max Moritz | ?th |
| 8.7.1973 | DARM Niederstetten | | #914 043 0165 | Edgar Dören | Bergischer Motorclub | ?th |
| 8.7.1973 | DARM Niederstetten | | | "Ronald Knudel" | MHSTC | ?th |
| 8.7.1973 | DARM Niederstetten | | | Dieter Weber | Scuderia Lindau/Bodensee | DNF |
| 15.7.1973 | 6 h Mid-Ohio | 67 | #914 043 1262 | David McClain | David H. McClain | 45th |
| 15.7.1973 | 6 h Mid-Ohio | 85 | | Don Parish | Donald Parish | 39th |
| 15.7.1973 | Diepholz [GT2.0/T1.6] | 138 | #914 143 0178 | Eckhard Schimpf | Jägermeister-Racing-Team | 2nd |
| 15.7.1973 | Diepholz [GT2.0/T1.6] | 139 | | Hans Christian Jürgensen | Hans Christian Jürgensen | DNA |
| 15.7.1973 | Diepholz [GT2.0/T1.6] | 242 | | Hubert Schlieckmann | Hubert Schlieckmann | DNA |
| 15.7.1973 | Diepholz [GT2.0/T1.6] | 243 | | Hermann Schlüter | Hans-Hermann Schlüter | DNA |
| 15.7.1973 | Diepholz [GT2.0/T1.6] | 244 | #914 043 0462 | Franz Konrad | Franz Konrad | 3rd |
| 15.7.1973 | Diepholz [GT2.0/T1.6] | | #914 143 0306 | Werner Christmann | Werner Christmann | 1st |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | #914 043 0165 | Edgar Dören | Bergischer Motorclub | ?th |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | | "Ronald Knudel" | MHSTC | ?th |
| 15.7.1973 | DARM Hockenheim [GT+1.6] | | | Albrecht Schütz | Autohaus Max Moritz | ?th |
| 15.7.1973 | DRM Diepholz | | #914 143 0306 | Werner Christmann | Werner Christmann | 5th |
| 22.7.1973 | SM Hockenheim [T2.0/GT2.0] | 326 | | Albrecht Schütz | Autohaus Max Moritz GmbH VW-Porsche Sportwagenzentrum | 1st |
| 22.7.1973 | SM Hockenheim [T2.0/GT2.0] | 327 | | Hans Stähli | Formel-Rennsport-Club | 4th |
| 22.7.1973 | SM Hockenheim [T2.0/GT2.0] | 328 | | Peter Karl Nowak | Braun sixtant racing team | 5th |
| 22.7.1973 | SM Hockenheim [T2.0/GT2.0] | 329 | | "Ronald Knudel" | Mannheim-Heidelbert Sports Touring Club | DNF |
| 28.7.1973 | Trans-Am Road America | 86 | | Parish / Hulen | Donald L. Parish | 25th |
| 5.8.1973 | DRM Nürburgring GP | 39 | #914 143 0178 | Eckhard Schimpf | Jägermeister-Racing-Team | 23rd |
| 5.8.1973 | DRM Nürburgring GP | 40 | | Hans Stähli | Formel Rennsport Club | 29th |
| 5.8.1973 | DRM Nürburgring GP | 47 | #914 143 0306 | Werner Christmann | Hubert Engbert Ölde | DNS |
| 12.8.1973 | Hessen Hockenheim [GT] | | | Walter Bauer | Autohaus Max Moritz | ?th |