Hello,

Could anyone tell me at what pressure the later, non-adjustable valve should open? I originally thought that it was around 5 bar, but someone is telling me between 10-12 bar. This seems extremely high to me, but I'm certainly no expert. Thanks.

I have no direct knowledge of RSR motors, but 5 bar (72.5 psi) seems a little low for a 911 relief valve so by default I would guess the units are 10 bar.

Don't have spec for RSR handy but here are several 911 oil pressure specs and nothing close to 10 bar.

1983 911 SC 4.0 bar @ 90 deg C @ 5000rpm
1991 911 Carrera 6.5 bar @ 90 deg C @ 5000rpm
1995 911 Carrera above 5 bar @ 80-90 deg C @ 5000rpm
2001 911 Carrera 5 bar @ 90 deg C @ 5000rpm
2001 911 GT3 6.3 bar @ 90 deg C @ 5000rpm
2008 911 Carrera S 5 bar @ 90 deg C @ 5000rpm


Jim

Perhaps, it means nothing but the GT oil pressure gauge only goes to 10 bar.

I thought that i'd post a couple of pictures from Armando's site of the valve I'm talking about. The p/n is 901.107.017.00.

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I've come across these two Behr oil coolers on Armando's site. The first is a 1970 914/6 GT and the second is a 1973 RSR. Both are only rated at 10 bar, so I have to think that the pressure relief valves should pop-off below 10 bar, not above. At least for this period. I haven't been able to confirm what the pressure rating was on the 1974 RSR oil coolers which had an in-built pressure relief valve.

Behr 1970 914/6 GT Oil Cooler
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Behr 1973 RSR Oil Cooler
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Just checking following the holidays if anyone has any additional information?