PORSCHE RACING HISTORYJan Lundgardh (S)
1980
16 March 1980 - Brands Hatch 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 18 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S)/Kurt Simonsen (S)/Preben Kristoffersen (DK) | Tuff-Kote Dinol Racing (S) | NC | 25th | 129 laps |
25 May 1980 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 24 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S)/Kennerth Persson (S) | Tuff-Kote Dinol Racing (S) | DNF | 24th | 2 laps - DNF |
24 August 1980 - DRM Zolder Westfalen-Pokal - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 64 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S) | Tuff-Kote Dinol Racing (S) | 7th | 7th | 11th | 22 laps |
7 September 1980 - Vallelunga 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 28 | Porsche 935 L1 | 935 L1 | Gr.5 | Jan Lundgardh (S)/Eberhard Braun (D) | Tuff-Kote Dinol Racing (S) | 13th | 5th | 30th | 225 laps |
28 September 1980 - Dijon 1000 Kilometres - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 935 L1 | 935 L1 | Gr.5 2.0 | Jan Lundgardh (S)/Eberhard Braun (D)/"James Bald" (A) | Lundgardh/Dinitrol Center (S) | DNF | 22nd | 54 laps - DNF |