| 4.2.1990 | 24 h Daytona | 0 | #142=>011 | Jelinski / Pescarolo / Ricci | Joest Racing | 45th |
| 4.2.1990 | 24 h Daytona | 2 | #C06 | Stuck / Grohs / Haywood / Herzog | Alucraft/Shapiro Motorsports | 4th |
| 4.2.1990 | 24 h Daytona | 3 | #004BM | Larrauri / Brun / Sigala | Brun Motorsports | DNS |
| 4.2.1990 | 24 h Daytona | 10 | #F01 (HR3F) | Adams / Hotchkis, Jr. / Hotchkis | Wynn's | 6th |
| 4.2.1990 | 24 h Daytona | 16 | #148 | Dyson | Dyson Racing | 55th |
| 4.2.1990 | 24 h Daytona | 17 | #141 | Boesel / Unser, Jr. / Unser | Dauer Racing | 27th |
| 4.2.1990 | 24 h Daytona | 23 | #DR1 | Adam / Laporte | DSR Motorsports | 54th |
| 4.2.1990 | 24 h Daytona | 30 | #001GS | Moretti / Bell / Dickens | Momo | 41st |
| 4.2.1990 | 24 h Daytona | 86 | #139 | Wollek / van der Merwe / Dobson | Texaco Havoline | 3rd |
| 25.2.1990 | GP Miami | 2 | #C06 | Herzog / Haywood | Alucraft | 5th |
| 25.2.1990 | GP Miami | 16 | #148 | Weaver / Pruett | Dyson Racing | 3rd |
| 25.2.1990 | GP Miami | 17 | #141 | Boesel / Wollek | Dauer Racing | 21st |
| 25.2.1990 | GP Miami | 23 | #DR1 | Adam / Seabroke | DSR Motorsports | 7th |
| 25.2.1990 | GP Miami | 30 | #001GS | Bell / Moretti / Coppelli | Momo | 17th |
| 11.3.1990 | 500 km Fuji | 1 | #147 | Takahashi / Mogi | Advan Alpha Nova | 8th |
| 11.3.1990 | 500 km Fuji | 2 | #134 | Dickens / Hoy | Alpha Racing | 6th |
| 11.3.1990 | 500 km Fuji | 7 | #154 | Needell / Los | The Alpha Racing | 10th |
| 11.3.1990 | 500 km Fuji | 19 | #138.001 | Lee-Davey / Giacomelli | Team Davey | DNF |
| 11.3.1990 | 500 km Fuji | 20 | #RLR 200 | Totani / Pérez-Sala / Reuter | Alpha Cubic With RLR | DNF |
| 11.3.1990 | 500 km Fuji | 27 | #151 | Weidler / Nakaya | From A Racing | 5th |
| 11.3.1990 | 500 km Fuji | 33 | #146 | Wollek / Herbert | Takefuji Racing Team | DQ |
| 11.3.1990 | 500 km Fuji | 55 | #TS962-01C | Elgh / Schuppan | Omron Racing Team | 11th |
| 11.3.1990 | 500 km Fuji | 100 | #106B | Fouché / Andskar | Trust Racing Team | 3rd |
| 17.3.1990 | 12 h Sebring | 0 | #142=>011 | "Winter" / Pescarolo / Wollek | Joest Racing | 11th |
| 17.3.1990 | 12 h Sebring | 2 | #C06 | Haywood / Herzog / Schubot | René Herzog | 31st |
| 17.3.1990 | 12 h Sebring | 10 | #F01 (HR3F) | Hotchkis / Adams / Hotchkis, Jr. | Hotchkis Racing | 4th |
| 17.3.1990 | 12 h Sebring | 16 | #148 | Weaver / Pruett | Dyson Racing | DNS |
| 17.3.1990 | 12 h Sebring | 17 | #141 | Boesel / Stuck | Dauer Racing | 14th |
| 17.3.1990 | 12 h Sebring | 23 | #DR1 | Adam / Harrington | DSR Motorsports | 45th |
| 17.3.1990 | 12 h Sebring | 86 | #139 | Wollek / Dobson / van der Merwe | Bruce Leven | 40th |
| 1.4.1990 | 500 km Road Atlanta | 16 | #148 | Weaver / Haywood | Dyson Racing | 5th |
| 1.4.1990 | 500 km Road Atlanta | 30 | #001GS | Moretti / Bell | Momo-Gebhardt Racing | 4th |
| 3.4.1990 | 1000 km Fuji | 1 | #147 | Takahashi / Mogi | Advan Alpha Nova | NC |
| 3.4.1990 | 1000 km Fuji | 2 | #134 | Dickens / Hoy / Takahashi | Alpha Racing | NC |
| 3.4.1990 | 1000 km Fuji | 7 | #154 | Needell / Bell / Los | The Alpha Racing | NC |
| 3.4.1990 | 1000 km Fuji | 20 | #RLR 200 | Reuter / Sandro Sala | Alpha Cubic With RLR | NC |
| 3.4.1990 | 1000 km Fuji | 27 | #151 | Nakaya / Weidler / Hane | From A Racing | NC |
| 3.4.1990 | 1000 km Fuji | 33 | | Herbert / Irvine / Rydell | Takefuji Racing Team | NC |
| 3.4.1990 | 1000 km Fuji | 55 | | Schuppan / Elgh / Mezera | Omron Racing Team | NC |
| 3.4.1990 | 1000 km Fuji | 100 | #106B | Fouché / Andskar / Kasuya | Trust Racing Team | NC |
| 8.4.1990 | 480 km Suzuka | 7 | #149=>012 | Wollek / Jelinski | Joest Porsche Racing | DNF |
| 8.4.1990 | 480 km Suzuka | 8 | #156=>014 | Palmer / Pescarolo | Joest Porsche Racing | 11th |
| 8.4.1990 | 480 km Suzuka | 9 | #129 | Dickens / "Winter" | Joest Porsche Racing | 16th |
| 8.4.1990 | 480 km Suzuka | 10 | #CK6/05-2 | Schneider / Okada | Porsche Kremer Racing | 13th |
| 8.4.1990 | 480 km Suzuka | 11 | #134 | Takahashi / Mogi | Porsche Kremer Racing (Advan Alpha Nova) | 5th |
| 8.4.1990 | 480 km Suzuka | 12 | #147 | Hoy / Takahashi | Courage Competition (Alpha Racing) | 14th |
| 8.4.1990 | 480 km Suzuka | 14 | #RLR 200 | Reuter / Pérez-Sala | Richard Lloyd Racing | 15th |
| 8.4.1990 | 480 km Suzuka | 15 | #007BM | Larrauri / Huysman | Brun Motorsport | 6th |
| 8.4.1990 | 480 km Suzuka | 16 | #150 | Pareja / Brun | Brun Motorsport | DNF |
| 8.4.1990 | 480 km Suzuka | 17 | #106B | Fouché / Andskar | Brun Motorsport (Trust Racing Team) | 7th |
| 8.4.1990 | 480 km Suzuka | 19 | #TS/01C | Elgh / Schuppan | Team Davey (Omron Racing Team) | 9th |
| 8.4.1990 | 480 km Suzuka | 20 | #138.001 | Lee-Davey / Toledano | Team Davey | 17th |
| 8.4.1990 | 480 km Suzuka | 26 | #901 | Oppermann / Grohs | Obermaier Primagaz Racing | DNF |
| 8.4.1990 | 480 km Suzuka | 27 | #902 | Altenbach / Lässig | Obermaier Primagaz Racing | DQ |
| 8.4.1990 | 480 km Suzuka | 32 | #CK6/04=>001K | Konrad / Ricci | Konrad Motorsport | 19th |
| 8.4.1990 | 480 km Suzuka | 34 | #154 | Needell / Bell | Equipe Almeras Fréres (The Alpha Racing) | 8th |
| 8.4.1990 | 480 km Suzuka | 39 | #151 | Nakaya / Weidler | Swiss Team Salamin (Form A Racing) | 10th |
| 22.4.1990 | 3 h West Palm Beach | 16 | #148?? | Weaver / Haywood | Dyson Racing | 16th |
| 22.4.1990 | 3 h West Palm Beach | 17 | #141 | Wollek / Acheson | Dauer Racing | 14th |
| 22.4.1990 | 3 h West Palm Beach | 30 | #001GS | Moretti | Gebhardt | 24th |
| 29.4.1990 | 480 km Monza | 6 | #129 | Pescarolo / Ricci | Joest Racing | 14th |
| 29.4.1990 | 480 km Monza | 7 | #149=>012 | Wollek / Jelinski | Joest Porsche Racing | 5th |
| 29.4.1990 | 480 km Monza | 8 | #156=>014 | Palmer / Needell | Joest Porsche Racing | 8th |
| 29.4.1990 | 480 km Monza | 9 | #145 | Dickens / "Winter" | Joest Porsche Racing | DNF |
| 29.4.1990 | 480 km Monza | 10 | #CK6/06-2 | van der Merwe / Schneider | Porsche Kremer Racing | 9th |
| 29.4.1990 | 480 km Monza | 11 | #CK6/02 | Olofsson / Reid | Porsche Kremer Racing (Convector) | 10th |
| 29.4.1990 | 480 km Monza | 14 | #RLR 201 | Reuter / Weaver | Richard Lloyd Racing | 17th |
| 29.4.1990 | 480 km Monza | 15 | #007BM | Larrauri / Huysman | Brun Motorsport | DNF |
| 29.4.1990 | 480 km Monza | 16 | #150 | Pareja / Brun | Brun Motorsport | DNF |
| 29.4.1990 | 480 km Monza | 17 | #003BM | Sigala / Elgh | Brun Motorsport | 12th |
| 29.4.1990 | 480 km Monza | 19 | #138.001 | Giacomelli / Ballabio | Team Davey | DNS |
| 29.4.1990 | 480 km Monza | 20 | #143 | Giacomelli / Toledano / Ballabio | Team Davey | DQ |
| 29.4.1990 | 480 km Monza | 26 | #901 | Oppermann / Grohs | Obermaier Racing | 15th |
| 29.4.1990 | 480 km Monza | 27 | #902 | Altenbach / Lässig | Obermaier Racing | DNF |
| 29.4.1990 | 480 km Monza | 32 | #CK6/04=>001K | Konrad / Coppelli | Konrad Motorsport | DNF |
| 29.4.1990 | 480 km Monza | 33 | #144 | Raul Boesel | Konrad Motorsport (Dauer Racing) | DNF |
| 29.4.1990 | 480 km Monza | 34 | #EAF/1 | Alméras / Alméras | Equipe Alméras Frères | DNQ |
| 29.4.1990 | 480 km Monza | 39 | #157 | Salamin / Taverna | Swiss Team Salamin | 16th |
| 4.5.1990 | Interserie Hungaroring | 1 | #152 | Walter Lechner | Walter Lechner Racing School | 9th |
| 4.5.1990 | Interserie Hungaroring | 2 | #CK6/04=>001K | Franz Konrad | Franz Konrad Motorsport | 10th |
| 4.5.1990 | Interserie Hungaroring | 4 | #007BM | Walter Brun | Brun Motorsport | 11th |
| 4.5.1990 | Interserie Hungaroring | 6 | | Giovanni Lavaggi | Porsche Kremer Racing | 2nd |
| 4.5.1990 | Interserie Hungaroring | 7 | #144 | Henri Pescarolo | Jochen Daurer Racing | 6th |
| 4.5.1990 | Interserie Hungaroring | 10 | | Bernd Schneider | Porsche Kremer Racing | 1st |
| 4.5.1990 | Interserie Hungaroring | 14 | #006BM | Willy König | Konig Specials Tuning | DNF |
| 4.5.1990 | Interserie Hungaroring | 26 | #902? | Jürgen Oppermann | Obermaier Primagaz | DNF |
| 4.5.1990 | Interserie Hungaroring | 27 | #130? | Otto Altenbach | Obermaier Primagaz | 5th |
| 4.5.1990 | Interserie Hungaroring | 28 | #901 | Harald Grohs | Obermaier Primagaz | 4th |
| 4.5.1990 | Interserie Hungaroring | 30 | | Günter Gebhardt | Gebhardt Racing | DNF |
| 6.5.1990 | 300 km Topeka | 2 | #C06 | Herzog / Haywood | Alucraft | 9th |
| 6.5.1990 | 300 km Topeka | 16 | #148?? | Dyson / Weaver / Haywood | Dyson Racing | DNA |
| 6.5.1990 | 300 km Topeka | 17 | | Bob Wollek | BFGoodrich | DNA |
| 6.5.1990 | 300 km Topeka | 30 | | Moretti / Bell | Momo-Gebhardt Racing | DNA |
| 20.5.1990 | 480 km Silverstone | 9 | #145 | Dickens / "Winter" | Joest Porsche Racing | DNF |
| 20.5.1990 | 480 km Silverstone | 10 | #CK6/06-2 | Schneider / Andskar | Porsche Kremer Racing | 5th |
| 20.5.1990 | 480 km Silverstone | 15 | #007BM | Larrauri / Huysman | Brun Motorsport | 6th |
| 20.5.1990 | 480 km Silverstone | 16 | #150 | Brun / Pareja | Brun Motorsport | 7th |
| 20.5.1990 | 480 km Silverstone | 17 | #008BM | Sigala / Santal | Brun Motorsport | 8th |
| 20.5.1990 | 480 km Silverstone | 19 | #138.001 | Lavaggi / Lee-Davey | Team Davey | 13th |
| 20.5.1990 | 480 km Silverstone | 20 | #143 | Stott / Toledano | Team Davey | NC |