PORSCHE RACING HISTORYTim Schenken (AUS)
1975 : European GT Championship Norisring - 3rd : DRM Kassel-Calden - 3rd overall : Interserie Zandvoort - 1st overall : Interserie Nürburgring Supersprint - 1st overall : Interserie Hockenheim Preis von Baden-Württemberg - 1st overall
4 May 1975 - Spa 1000 Km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 45 | Porsche 911 Carrera RSR | 911 460 9077 | GT | Toine Hezemans (NL)/Tim Schenken (AUS)/John Fitzpatrick (GB) | Gelo Racing (D) | 9th | 5th | 20th | 47 laps |
4 May 1975 - Spa 1000 Km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 44 | Porsche 911 Carrera RSR | 911 460 9040 | GT | John Fitzpatrick (GB)/Manfred Schurti (FL)/Tim Schenken (AUS) | Gelo Racing (D) | 11th | 6th | 17th | 45 laps |
15 June 1975 - Le Mans 24 Hours - Non Championship Race
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 911 Carrera RSR | 911 460 9077 | GTS | Tim Schenken (AUS)/Howden Ganley (NZ) | Gelo Racing Team (D) | DNF | 26th | 106 laps - Gearbox |
29 June 1975 - European GT Championship Norisring - European Championship for Grand Touring Cars
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 3 | Porsche 911 Carrera RSR | 911 460 9077 | GT3.0 | Tim Schenken (AUS) | Gelo Racing Team Georg Loos (D) | 3rd | 66 laps |
17 August 1975 - DRM Kassel-Calden - DRM - Deutsche Rennsport Meisterschaft
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 911 Carrera RSR | 911 460 9077 | Div.1 | Tim Schenken (AUS) | Gelo Racing Team Georg Loos (D) | 3rd | 3rd | 6th | 40 laps |
24 August 1975 - Interserie Zandvoort - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/10 | Div.I | Tim Schenken (AUS) | Gelo-Racing Loos (D) | 1st | 1st | 2nd | 30 laps |
7 September 1975 - Interserie Nürburgring Supersprint - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 917/10 | Div.I | Tim Schenken (AUS) | GELO-Racing-Team (D) | 1st | 1st | 3rd | 50 laps |
28 September 1975 - Interserie Hockenheim Preis von Baden-Württemberg - Interserie
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/10 | Div.I | Tim Schenken (AUS) | Gelo Racing Team, Georg Loos (D) | 1st | 1st | 20 laps |