PORSCHE RACING HISTORYReinhold Jöst (D)
1979 : Dijon 6 Hours - 1st overall : Interserie Nürburgring 1000 km - 1st overall : Brands Hatch 6 Hours - 1st overall : Interserie Hockenheim - 1st overall
4 February 1979 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 4 | Porsche 935/77A | 930 890 0014 | GTX | Reinhold Jöst (D)/Rolf Stommelen (D)/Volkert Merl (D) | LM Joest Porsche (D) | 46th | 11th | 4th | 162 laps - Engine |
22 April 1979 - Dijon 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 31 | Porsche 908/03 | 908/03-008 | S+2.0 | Reinhold Jöst (D)/Volkert Merl (D)/Mario Ketterer (D) | LM Joest Racing (D) | 1st | 1st | 1st | 255 laps |
3 June 1979 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 101 | Porsche 908/03 Turbo | 908/03-008 | S+2.0 | Rolf Stommelen (D)/Reinhold Jöst (D) | Liqui Moly Joest Racing (D) | DNF | 1st | Holed Fuel Tank |
3 June 1979 - Interserie Nürburgring 1000 km - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 101 | Porsche 908/03 Turbo | 908/03-008 | Div.I | Rolf Stommelen (D)/Reinhold Jöst (D) | Liqui Moly Joest Racing (D) | 1st | 1st | 7 laps |
5 August 1979 - Brands Hatch 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 908/03 Turbo | 908/03-008 | S+2.0 | Reinhold Jöst (D)/Volkert Merl (D) | Joest Racing (D) | 1st | 1st | 1st | 231 laps |
2 September 1979 - Interserie Hockenheim - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| Porsche 908/03 Turbo | 908/03-008 | Div.I | Reinhold Jöst (D) | Liqui Moly Equipe (D) | 1st | 1st | 50 laps |