<VV> Oil Pressure and High Volume Pumps

[Dave Keillor]

Yes, 60 psi regulator.

Dave Keillor
________________________________________
From: jvhroberts at aol.com [mailto:jvhroberts at aol.com] 
Sent: Tuesday, August 31, 2010 1:32 PM
To: Dave Keillor; virtualvairs at corvair.org
Subject: Re: <VV> Oil Pressure and High Volume Pumps

Yep. And with more pressure and flow, you can do things like add oil
reliefs to the rods and throw more oil at the base of the pistons, etc. 

However, something to keep in mind, a bigger pump won't flow more oil to
the bearings without more pressure. In fact, all a bigger pump will do,
most of the time, is put more oil flow through the regulator, although
it should raise idle pressure. 
So, yeah, big fan of a bigger pump, but only if there's a higher
pressure regulator to go with it. 

John Roberts


-----Original Message-----
From: Dave Keillor <dkeillor at tconcepts.com>
To: virtualvairs at corvair.org
Sent: Tue, Aug 31, 2010 1:44 pm
Subject: Re: <VV> Oil Pressure and High Volume Pumps
The person who built my engine used a high volume oil pump and a high


pressure spring.  Here's what he replied when I asked him about it:





"The crank was done with a special relief of the rod & main bearing


radius at the journals and all oil holes were fluted. As far as the high


volume oil pump on a built up street engine, I prefer it for the


increased oil flow and cooling affect it has on the bearings. The lead


babbit and copper interface on the bearing has a reduced risk of


becoming "unclad " and reduce smearing of the material and helps keep


the bearing tolerances on the compression stroke reducing premature


bearing wear."





Dave Keillor





-----Original Message-----


From: virtualvairs-bounces at corvair.org


[mailto:virtualvairs-bounces at corvair.org] On Behalf Of


jvhroberts at aol.com


Sent: Tuesday, August 31, 2010 12:26 PM


To: ricknorris at suddenlink.net; kenpepke at juno.com;


virtualvairs at corvair.org


Subject: Re: <VV> Oil Pressure








 IMHO, higher oil pressure carries with it very few sins. The amount of


HP it takes to drive the pump is really pretty small, so, no biggie


there.





However, higher pressure does get you higher oil flow, and that's good


for a lot of reasons. It allows the oil to carry away more heat, since


the flow is greater. The higher flow that comes with higher pressure


also makes oil coolers work better, although, you will see a rise in oil


temperature simply because the higher oil flow also carries away more


heat from the engine. 





Obviously, getting to the point where you're blowing gaskets, oil


filters, stripping the drive gears, etc., is a bad thing, but that's


probably well north of 100 PSI. 





I don't get the foaming thing, since most of that is caused by windage,


etc. But that's just me!





 





John Roberts


 


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