PORSCHE RACING HISTORYReinhold Jöst (D)
1975 : Dijon 800 Km - 2nd overall : Interserie Hockenheim Jim Clark - 3rd in class : Monza 1000 Km - 2nd overall : Spa 1000 Km - 3rd in class : Coppa Florio - 3rd overall : Zeltweg 1000 km - 3rd overall : Interserie Hockenheim Südwestpokal - 2nd overall : Interserie Kassel-Calden - 3rd in class : Interserie Zandvoort - 2nd in class
23 March 1975 - Mugello 1000 Km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 908/03 Turbo | 908/03-008 | S3.0 | Reinhold Jöst (D)/Mario Casoni (I) | Scuderia Nettuno Ovoro (D) | DNF | 5th | 38 laps - Turbocharger |
6 April 1975 - Dijon 800 Km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 10 | Porsche 908/03 Turbo | 908/03-008 | S3.0 | Reinhold Jöst (D)/Mario Casoni (I) | Joest Racing (D) | 2nd | 2nd | 5th | 238 laps |
13 April 1975 - Interserie Hockenheim Jim Clark - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 42 | Porsche 908/03 Turbo | 908/03-008 | Div. II | Reinhold Jöst (D) | Jöst Racing (D) | 4th | 3rd | 19 laps |
20 April 1975 - Monza 1000 Km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 908/03 Turbo | 908/03-008 | S3.0 | Reinhold Jöst (D)/Mario Casoni (I) | Scuderia Nettuno Ovoro (D) | 2nd | 2nd | 8th | 171 laps |
4 May 1975 - Spa 1000 Km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 908/03 | 908/03-012 | S3.0 | Jürgen Barth (D)/Mario Casoni (I)/Reinhold Jöst (D) | Porsche A.G. (D) | 7th | 3rd | 11th | 48 laps |
4 May 1975 - Spa 1000 Km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 908/03 Turbo | 908/03-008 | S3.0 | Reinhold Jöst (D)/Mario Casoni (I) | Porsche A.G. (D) | DNF | 4th | 3 laps - Valves |
18 May 1975 - Coppa Florio - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 4 | Porsche 908/03 Turbo | 908/03-008 | S3.0 | Reinhold Jöst (D)/Mario Casoni (I) | Scuderia Nettuno Ovoro (D) | 3rd | 3rd | 3rd | 184 laps |
1 June 1975 - Nürburgring 1000 Km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 908/03 Turbo | 908/03-008 | S3.0 | Reinhold Jöst (D)/Mario Casoni (I) | Joest-Racing (D) | DNF | 2 laps - Turbocharger |
15 June 1975 - Le Mans 24 Hours - Non Championship Race
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 908/03 | 908/03-012 | S3.0 | Reinhold Jöst (D)/Mario Casoni (I)/Jürgen Barth (D) | Joest Racing (D) | 4th | 4th | 4th | 325 laps |
29 June 1975 - Zeltweg 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 908/03 Turbo | 908/03-008 | S3.0 | Reinhold Jöst (D)/Mario Casoni (I) | Scuderia Nettuno Ovoro (D) | 3rd | 3rd | 4th | 102 laps |
20 July 1975 - Interserie Hockenheim Südwestpokal - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 426 | Porsche 908/03 Turbo | 908/03-008 | Div.II | Reinhold Jöst (D) | Jöst Racing Team (D) | 2nd | 2nd | 15 laps |
17 August 1975 - Interserie Kassel-Calden - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| Porsche 908/03 Turbo | 908/03-008 | Div.II | Reinhold Jöst (D) | Joest-Racing (D) | 4th | 3rd | 39 laps |
24 August 1975 - Interserie Zandvoort - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 42 | Porsche 908/03 Turbo | 908/03-008 | Div.II | Reinhold Jöst (D) | Reinhold Jöst (D) | 5th | 2nd | 30 laps |
7 September 1975 - Interserie Nürburgring Supersprint - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 5 | Porsche 908/03 Turbo | 908/03-008 | Div.II | Reinhold Jöst (D) | Jöst-Racing (D) | DNF | 5th |
28 September 1975 - Interserie Hockenheim Preis von Baden-Württemberg - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 42 | Porsche 908/03 Turbo | 908/03-008 | Div.I | Reinhold Jöst (D) | Jöst Racing (D) | 10th |