<VV> Oil Pressure

[Paul Fox]

Ken, The stock oil pump has a large capacity.It is more than enough for most applications including racing with a remote cooler at 7000 rpm plus. If you put even a small spacer in the regulator it will make up for much wear in an engine. However it is much better to do a rebuild any way.
                Paul Fox--- On Thu, 8/20/09, kenpepke at juno.com <kenpepke at juno.com> wrote:


From: kenpepke at juno.com <kenpepke at juno.com>
Subject: Re: <VV> Oil Pressure
To: virtualvairs at corvair.org
Date: Thursday, August 20, 2009, 6:30 AM



First, it is important to verify the actual pressure with a known gauge.  Under racing conditions 10 psi per thousand RPM is sufficient.  Under street operating conditions your 25 to 27 psi [if actual] should provide years of satisfactory service.  

The oil pressure relief spring does not come into play until the oil pressure in the system exceeds its pressure value.  One might put a higher value spring in an engine to supply enough pressure for racing RPMs but not for street use.   Should the engine be worn to the point of not reaching that value, changing the spring would have little effect.  Increasing pressure on a severely worn engine would require a higher volume oil pump.  The drawback with increasing either volume / or pressure is an increase in oil temperature ... Not a desired condition especially in air cooled engines.
Ken P 

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dpross1342 at aol.com wrote:

I have a 1967 110HP with  oil pressure & oil temperature gauges, both  
VDO electric. The pressure sender has an auxiliary ground.
When running, and the oil temp is about 180 degrees, the pressure runs  
between 25-27 PSI, and stays there, even if the oil temperature rises  
to over 200+ degrees. Since the factory spec is 35 PSI, is the lower  
oil pressure at risk of damaging my engine?
I also would like to know if anyone has had experience with the higher  
pressure relief springs sold by Clarks? Is there
a greater chance of oil leaks, particularly around that complex  
casting where the oil filter is attached?
Thanks for any feedback.
Don Rossbach
dpross1342 at aol.com


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