| 8.5.1988 | 1000 km Silverstone | 7 | #129 | Wollek / Streiff / Hobbs | Blaupunkt-Joest Racing GmbH | 4th |
| 8.5.1988 | 1000 km Silverstone | 8 | #116 | Jelinski / Dickens / "Winter" | Joest Racing GmbH | 5th |
| 8.5.1988 | 1000 km Silverstone | 40 | #131 | Salamin / Mundas / Cohen-Olivar | Swiss Team Salamin | 7th |
| 29.5.1988 | Supercup Hockenheim | 6 | #001BM | Walter Brun | Jägermeister-Brun-Motorsport | 5th |
| 29.5.1988 | Supercup Hockenheim | 8 | #115 | Uwe Schäfer | Jägermeister-Brun-Motorsport | 3rd |
| 29.5.1988 | Supercup Hockenheim | 10 | #133 | Jochen Dauer | Victor-Dauer-Racing | 6th |
| 29.5.1988 | Supercup Hockenheim | 20? | #131 | Antoine Salamin | Swiss Team Salamin | 9th |
| 29.5.1988 | Supercup Hockenheim | | #129 | Bob Wollek | Blaupunkt-Joest Racing | 2nd |
| 29.5.1988 | Supercup Hockenheim | | #137=>009 | Hans-Joachim Stuck | Porsche AG | 11th |
| 29.5.1988 | Supercup Hockenheim | | #116 | "John Winter" | Blaupunkt-Joest Racing | 4th |
| 29.5.1988 | Supercup Hockenheim | | #118CK=>WLM02 | Walter Lechner | Walter Lechner Racing School | 7th |
| 12.6.1988 | 24 h Le Mans | 4 | #117 | Lechner / Hunkeler / Reuter | Camel Brun Motorsport | DNF |
| 12.6.1988 | 24 h Le Mans | 5 | #115 | Pareja / Sigala / Schäfer | Repsol Brun Motorsport | 7th |
| 12.6.1988 | 24 h Le Mans | 7 | #004=>104C | Hobbs / Theys / Konrad | Blaupunkt-Joest Racing | 5th |
| 12.6.1988 | 24 h Le Mans | 8 | #116 | Dickens / "Winter" / Jelinski | Blaupunkt-Joest Racing | 3rd |
| 12.6.1988 | 24 h Le Mans | 11 | #118CK-3 | Nissen / Grohs / Fouché | Leyton House Kremer | 8th |
| 12.6.1988 | 24 h Le Mans | 17 | #140=>010 | Stuck / Ludwig / Bell | Porsche AG | 2nd |
| 12.6.1988 | 24 h Le Mans | 17T | #006 | Michael Andretti | Porsche AG | T-car |
| 12.6.1988 | 24 h Le Mans | 18 | #135=>007 | Wollek / Schuppan / van der Merwe | Porsche AG | DNF |
| 12.6.1988 | 24 h Le Mans | 19 | #136=>008 | Andretti / Andretti / Andretti | Porsche AG | 6th |
| 12.6.1988 | 24 h Le Mans | 33 | #123 | Redman / Jarier / Elgh | Takefuji Schuppan Racing Team | 10th |
| 12.6.1988 | 24 h Le Mans | 35 | #118CK=>WLM02 | Lechner / Franzmaier / Hessert | Walter Lechner Racing SChool | DNA |
| 12.6.1988 | 24 h Le Mans | 40 | #131 | Calderari / Salamin / Cohen-Olivar | Swiss Team Salamin | DNA |
| 12.6.1988 | 24 h Le Mans | 72 | #130 | Yver / Wood / Lässig | Primagaz Compétition | 11th |
| 26.6.1988 | Supercup Norisring | 1 | #137=>009 | Hans-Joachim Stuck | Porsche AG | T-car |
| 26.6.1988 | Supercup Norisring | 1T | #140=>010 | Hans-Joachim Stuck | Porsche AG | 2nd |
| 26.6.1988 | Supercup Norisring | 2 | #129 | Bob Wollek | Blaupunkt-Joest Racing | DNF |
| 26.6.1988 | Supercup Norisring | 3 | #004=>104C | "John Winter" | Blaupunkt-Joest Racing | 6th |
| 26.6.1988 | Supercup Norisring | 4 | | Philippe Streiff | Joest Racing GmbH | DNA |
| 26.6.1988 | Supercup Norisring | 6 | #001BM | Walter Brun | Jägermeister-Brun-Motorsport | DNF |
| 26.6.1988 | Supercup Norisring | 7 | #117 | Manuel Reuter | Jägermeister-Brun-Motorsport | 3rd |
| 26.6.1988 | Supercup Norisring | 8 | #002BM | Uwe Schäfer | Jägermeister-Brun-Motorsport | 4th |
| 26.6.1988 | Supercup Norisring | 9 | #112a | Chip Robinson | Victor-Dauer-Racing | 5th |
| 26.6.1988 | Supercup Norisring | 10 | #133 | Jochen Dauer | Victor-Dauer-Racing | DNF |
| 26.6.1988 | Supercup Norisring | 11 | | Bruno Giacomelli | Porsche Kremer Racing | DNA |
| 26.6.1988 | Supercup Norisring | 12 | #118 | Kris Nissen | Porsche Kremer Racing | DNS |
| 26.6.1988 | Supercup Norisring | 18 | #118CK=>WLM02 | Walter Lechner | Walter Lechner Racing School | DNF |
| 26.6.1988 | Supercup Norisring | 20 | #131 | Antoine Salamin | Swiss Team Salamin | 8th |
| 26.6.1988 | Supercup Norisring | 35 | #112=>009/88D | Heinz-Jörgen Dahmen | Heinz-Jörgen Dahmen | raced |
| 10.7.1988 | 360 km Brno | 7 | #129 | Wollek / "Winter" | Blaupunkt Joest Racing | 5th |
| 10.7.1988 | 360 km Brno | 8 | #116 | Konrad / Barth | Blaupunkt Joest Racing | 6th |
| 10.7.1988 | 360 km Brno | 10 | #118 | Kris Nissen | Porsche Kremer Racing | DNA |
| 10.7.1988 | 360 km Brno | 40 | #131 | Salamin / Taverna | Swiss Team Salamin | 9th |
| 17.7.1988 | Interserie Wunstorf | 1 | #118CK=>WLM02 | Walter Lechner | Walter Lechner Racing School | 2nd |
| 17.7.1988 | Interserie Wunstorf | 2 | #116 | "John Winter" | Joest-Racing | 3rd |
| 17.7.1988 | Interserie Wunstorf | 7 | #112=>009/88D | Heinz-Jörgen Dahmen | Heinz-Jörgen Dahmen | DNS |
| 17.7.1988 | Interserie Wunstorf | 9 | #133 | Jochen Dauer | Victor Dauer Racing | DNF |
| 17.7.1988 | Interserie Wunstorf | 10 | #CK6/88 | Kris Nissen | Porsche Kremer Racing | 1st |
| 17.7.1988 | Interserie Wunstorf | 14 | #131 | Antoine Salamin | Swiss Team Salamin | DNA |
| 24.7.1988 | 500 mile Fuji | 1 | #126 | Takahashi / Mogi | Advan Alpha Nova | DNF |
| 24.7.1988 | 1000 km Brands Hatch | 7 | #129 | Ludwig / Wollek | Blaupunkt-Joest Racing | 2nd |
| 24.7.1988 | 1000 km Brands Hatch | 8 | #116 | Jelinski / "Winter" | Blaupunkt-Joest Racing | DNF |
| 24.7.1988 | 500 mile Fuji | 16T | #114 | Nagasaka / Hoshino / Kageyama | Leyton House Racing Team | 7th |
| 24.7.1988 | 500 mile Fuji | 25 | #123/HR6 | Elgh / Sandro Sala | Rothmans Porsche Team Schuppan | DNF |
| 24.7.1988 | 500 mile Fuji | 27 | #132 | Okada / Dickens | From A Racing | 1st |
| 24.7.1988 | 1000 km Brands Hatch | 40 | #131 | Salamin / Lavaggi / Delétraz | Swiss Team Salamin | 7th |
| 24.7.1988 | 500 mile Fuji | 55 | #123 | Acheson / Cobb | Omron Racing Team | 2nd |
| 31.7.1988 | Interserie Zeltweg | 2 | #116 | "John Winter" | Joest Racing | 2nd |
| 31.7.1988 | Interserie Zeltweg | 3 | #001BM | Walter Brun | Brun Motorsport | 1st |
| 31.7.1988 | Interserie Zeltweg | 9 | #133 | Jochen Dauer | Dauer Racing | 11th |
| 31.7.1988 | Interserie Zeltweg | 14? | #131 | Antoine Salamin | Swiss Team Salamin | 3rd |
| 31.7.1988 | Interserie Zeltweg | | #118CK=>WLM02 | Walter Lechner | Walter Lechner Racing School | DNS |
| 7.8.1988 | Supercup Diepholz | 1 | #137=>009 | Hans-Joachim Stuck | Porsche AG | DNF |
| 7.8.1988 | Supercup Diepholz | 2 | #129 | Bob Wollek | Blaupunkt-Joest Racing | 3rd |
| 7.8.1988 | Supercup Diepholz | 3 | #116 | "John Winter" | Blaupunkt-Joest Racing | 8th |
| 7.8.1988 | Supercup Diepholz | 5 | #004=>104C | Franz Konrad | Joest Racing | 6th |
| 7.8.1988 | Supercup Diepholz | 6 | #001BM | Walter Brun | Jägermeister-Brun Motorsport | 7th |
| 7.8.1988 | Supercup Diepholz | 8 | #002BM | Uwe Schäfer | Jägermeister-Brun Motorsport | 9th |
| 7.8.1988 | Supercup Diepholz | 9 | #112a | | Victor-Dauer-Racing | DNA |
| 7.8.1988 | Supercup Diepholz | 10 | #133 | Jochen Dauer | Victor-Dauer-Racing | 4th |
| 7.8.1988 | Supercup Diepholz | 12 | #118 | | Porsche Kremer Racing Team | DNA |
| 7.8.1988 | Supercup Diepholz | 20 | #131 | Antoine Salamin | Swiss Team Salamin | 10th |
| 7.8.1988 | Supercup Diepholz | 25 | #112=>009/88D | Heinz-Jörgen Dahmen | Heinz-Jörgen Dahmen | 11th |
| 7.8.1988 | Supercup Diepholz | 26 | #140=>010 | Klaus Ludwig | Porsche AG | 5th |
| 14.8.1988 | Interserie Most | 2 | #116 | "John Winter" | Blaupunkt-Joest-Racing | 2nd |
| 14.8.1988 | Interserie Most | 7 | #112=>009/88D | Heinz-Jörgen Dahmen | Heinz-Jörgen Dahmen | DNS |
| 14.8.1988 | Interserie Most | 9 | #112a | Jochen Dauer | Victor Dauer Racing | 1st |
| 14.8.1988 | Interserie Most | 14 | #131 | Antoine Salamin | Swiss Team Salamin | 3rd |
| 14.8.1988 | Interserie Most | | #CK6/88 | Kris Nissen | Porsche Kremer Racing | DNA |
| 14.8.1988 | Interserie Most | | #118CK=>WLM02 | Walter Lechner | Walter Lechner Racing School | DNA |
| 14.8.1988 | Interserie Most | | #001BM | Walter Brun | Brun-Porsche-Team | DNA |
| 28.8.1988 | 1000 km Suzuka | 1 | #126 | Takahashi / Mogi | Advan Alpha Nova | 2nd |
| 28.8.1988 | 1000 km Suzuka | 15 | #114 | Hoshino / Kageyama | Leyton House Racing Team | 6th |
| 28.8.1988 | 1000 km Suzuka | 25 | #123/HR6 | Elgh / Sandro Sala | Rothmans Porsche Team Schuppan | 7th |
| 28.8.1988 | 1000 km Suzuka | 27 | #132 | Okada / Dickens | From A Racing | 1st |
| 28.8.1988 | 1000 km Suzuka | 55 | #123 | Acheson / Cobb | Omron Racing Team | DNF |
| 4.9.1988 | 1000 km Nürburgring | 4 | #001BM | Huysman / Brun | Brun Motorsport | 6th |
| 4.9.1988 | 1000 km Nürburgring | 5 | #002BM | Schäfer / Larrauri | Brun Motorsport | 11th |
| 4.9.1988 | 1000 km Nürburgring | 6 | #117 | Reuter / Pareja | Brun Motorsport | 5th |
| 4.9.1988 | 1000 km Nürburgring | 7 | #135=>007 | Wollek / Barilla | Blaupunkt-Joest Racing | 3rd |
| 4.9.1988 | 1000 km Nürburgring | 8 | #129 | Jelinski / "Winter" | Blaupunkt-Joest Racing | 4th |
| 4.9.1988 | 1000 km Nürburgring | 10T | | Giacomelli / Weidler | Porsche Kremer Racing | T-car |
| 4.9.1988 | 1000 km Nürburgring | 16 | #133 | Dauer / Konrad | Victor Dauer Racing | DNF |
| 4.9.1988 | 1000 km Nürburgring | 20 | #138 | Lee-Davey / Dodd-Noble / Oberndorfer | Tim Lee-Davey | DNF |
| 4.9.1988 | 1000 km Nürburgring | 35 | #118CK=>WLM02 | Walter Lechner | Watler Lechner Racing School | DNA |
| 4.9.1988 | 1000 km Nürburgring | 40 | #131 | Salamin / Lavaggi | Swiss Team Salamin | 9th |
| 18.9.1988 | 1000 km Spa | 4 | #001BM | Brun / Larrauri / Reuter | Brun Motorsport | DNF |
| 18.9.1988 | 1000 km Spa | 7 | #135=>007 | Wollek / Barilla | Blaupunkt Joest Racing | DNF |
| 18.9.1988 | 1000 km Spa | 8 | #129 | "Winter" / Jelinski | Joest Racing GmbH | DNF |
| 18.9.1988 | 1000 km Spa | 35 | #WLM01 | Lechner / Franzmaier / Dauer | Walter Lechner Racing School | DNF |