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Join Date: Nov 2001
Location: Jamestown,NC USA
Posts: 1,291
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Oil pressure at WOT
What are acceptable oil pressure numbers at full throttle?
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05-27-2007, 10:03 AM
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Join Date: Oct 2003
Location: Michigan
Posts: 14,093
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You would like to see around 10PSI for every 1000 RPM. Although not everyone will agree, I think is pretty much the standard for most HP engines.
5000RPM=50PSI
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1981 911SC ROW SOLD - JULY 2015 Pacific Blue Wayne |
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05-27-2007, 10:22 AM
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Thats what i have always heard, 10psi-1 bar for every 1000rpm. Is it linear up to redline?
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05-27-2007, 11:18 AM
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Slumlord
Join Date: May 2001
Location: Canada
Posts: 4,983
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Should be linear, 1 bar / 1000 rpm.
Is yours non-linear?
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05-27-2007, 11:27 AM
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Many cars are not linear. Later 911 (964,993) cars seem to have higher oil pressure at idle and low RPM than earlier cars. Porsche has a spec for each car. The guidance of 10 PSI to 1 bar per 1000 RPM is a good guide for early cars. Throttle position should have no effect on oil pressure except to influence the RPM the engine is at.
-Andy
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05-27-2007, 04:10 PM
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Location: Back in B'ham, AL
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If you imply WOT = max rpms then the oil pressure should be @ 5bars (maxed out).
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05-27-2007, 04:11 PM
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I should probably have added that the motor is a twin plug 3.5 making about 270rwhp. I have pretty aggresive cams, so my idle is about 1300 with 40psi oil pressure. Oil temp is generally around 150-180 unless it is really hot or i am stop and go. Normal driving and midrange acceleration pressure stays between 60 and 100, but if i really romp on it it will spike up above 100 and drop back down in betwen shifts.
After doing some research with the search button, i am not as concerned as i was, but i'm still going to check the sender and pressure with a mechanical gauge. Paul
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My ignition is retarded. |
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05-28-2007, 08:54 AM
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