PORSCHE RACING HISTORYSerge Bolomey (CH)
1973
27 May 1973 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 48 | Porsche 911 Carrera RSR | 911 360 0960 | GT+1.6 | Peter Zbinden (CH)/Serge Bolomey (CH)/Klaus Fritzinger (D) | Porsche Club Romand (CH) | DNF | 34th | Engine |
8 July 1973 - European GT Championship Estoril - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 911 Carrera RS | GT3.0 | Serge Bolomey (CH) | 11th | 10th | 12th | 70 laps |
7 October 1973 - DRM Sauerland Hill Climb - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| Porsche 911 Carrera RSR | Div.I | Serge Bolomey (CH) | 21st | 11th | 114th | 4:22.660 |