<VV> Oil Pressure Question

[Bob Gilbert]

Hi Bob,

I always check with a mechanial gauge teed into the same port as your
electrical gauge. I have been told I am a "bit" cautious.   (-;

Bob


----- Original Message ----- 
From: "Bob Gilbert" <bgilbert at gilberts-bc.ca>
To: <BobHelt at aol.com>; <virtualvairs at corvair.org>
Sent: Monday, May 07, 2012 10:55 AM
Subject: Re: <VV> Oil Pressure Question


> Hi Bob,
>
>
>
> Good advice - thanks.
>
>
>
> My next step is to check the end plate clearance, if only to reassure
> myself
> that I did it properly. Right now, assuming the gauge is accurate, hot
> idle
> is just under 15 PSI so I'm not too concerned about any serious internal
> engine problems. Later I'll check the hot pressure at 4,000 RPM.
>
>
>
> Regards,
>
> Bob
>
>
>
>
>
> From: BobHelt at aol.com [mailto:BobHelt at aol.com]
> Sent: May-07-12 9:20 AM
> To: bgilbert at gilberts-bc.ca; virtualvairs at corvair.org
> Subject: Re: <VV> Oil Pressure Question
>
>
>
> Hello Bob,
>
> May I suggest that you are delving into the black unknown here with your
> inquiry?
>
> There are no specs for pressures made via end plate clearances, and highly
> unlikely that there is any VALID experimental data either. Set it to the
> specs and forget it.
>
>
>
> In addition there is no pressure spec for 2500 rpm.  So I suggest you
> stick
> with the known specs and data, The important data point is what pressure
> do
> you get at a normal idle speed with a HOT engine and spec'd oil grade?
> More
> too...If I remember correctly, the original spec was for a minimum of 4
> PSI.
> but the oil light is controlled by the snap switch and there are several
> types in use with different pressure activation points. So the best thing
> is
> to install an accurate pressure gauge and measure the pressure at a hot
> idle. That is your basic criterion. it should be about 10-15 PSI min.
>
>
>
> Then if you are interested, measure the hot pressure at 4000 rpm and see
> what you get. The spec varies slightly from engine to engine (em vs late
> basically). But 40 PSI is about max. If the idle pressure is around 10-15
> psi, then you can stretch the pressure relief spring slightly to increase
> the max pressure. The max pressure is NOT critical though as long as it is
> in the 40 PSI ballpark.
>
>
>
> IF and I say IF, your pressures are low, look first to the camshaft
> bearing
> clearances. Then to the endplate clearance.
>
>
>
> Good luck,
>
> Regards,
>
> Bob Helt
>
>
>