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girtp
 Post subject: Idle Oil Pressure
PostPosted: Mon May 24, 2010 11:14 am 
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Just curious what oil pressure at idle should roughly be ? The engine is a mild 1275 webber and cam and done around 5000klms.....

Thanks

PG

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simon k
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PostPosted: Mon May 24, 2010 12:12 pm 
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when hot... 50 is good, 25 isn't good, 0 is bad
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AEG163job
 Post subject:
PostPosted: Mon May 24, 2010 12:14 pm 
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Preferably not zero :P

With my limited knowledge I would guess not < 25psi with oil in good condition and at normal operating temp. Obviously there are factors like viscosity and how hard the engine has been working, existence of oil cooler etc.
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GT mowog
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PostPosted: Mon May 24, 2010 12:29 pm 
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Depends a bit on oil viscosity and what the engine was built for, but at idle (~900 rpm) anything over 15 psi is OK.

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girtp
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PostPosted: Mon May 24, 2010 1:00 pm 
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Location: Melbourne, Edithvale
New 25w50 Castrol Edge...

It appears my guage is very sensitive compaired to my race cars engine and guage......

Its moving around alot with engine revs, as expected but I didnt think it would move as it does...

Thanks

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1964 Grp Nb Cooper S
1976 911 3.6 Circuit Car
1969 911T Grp Sb Historic Racer
2009 LC200 V8 TDI.... 660nm..
2011 Golf VI, TSI
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simon k
 Post subject:
PostPosted: Mon May 24, 2010 1:06 pm 
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yopu could take the relief valve out and have a look - might be some gunk in it, or badly scored
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girtp
 Post subject:
PostPosted: Mon May 24, 2010 1:17 pm 
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I actually replaced it and the spring I "thought" I had an oil pressure issue so replaced it as a matter of caution....

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1976 911 3.6 Circuit Car
1969 911T Grp Sb Historic Racer
2009 LC200 V8 TDI.... 660nm..
2011 Golf VI, TSI
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GT mowog
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PostPosted: Mon May 24, 2010 1:42 pm 
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What oil pressure are you getting i) at idle and ii) when running?

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girtp
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PostPosted: Mon May 24, 2010 2:02 pm 
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Idle around 20-30, then running at say 100 kph 80psi.... obviously depends on engine rpm.....
So it appears to be OK....

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1976 911 3.6 Circuit Car
1969 911T Grp Sb Historic Racer
2009 LC200 V8 TDI.... 660nm..
2011 Golf VI, TSI
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GT mowog
 Post subject:
PostPosted: Mon May 24, 2010 2:24 pm 
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girtp wrote:
Idle around 20-30, then running at say 100 kph 80psi.... obviously depends on engine rpm.....
So it appears to be OK....


Sounds fine to me, perhaps a little on the high end when running though, leads to high oil temps.

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phillb
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PostPosted: Mon May 24, 2010 4:43 pm 
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Could be worth checking the filter at the back of the gauge on both cars. See my post...

http://www.ausmini.com/forums/viewtopic ... gage+guage

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