<VV> Oil Pressure and High Volume Pumps

[jvhroberts at aol.com]

 Oh, I've cleaned the overlay off of many a rod bearing in my turbo, no doubt due to detonation...

 

John Roberts
 

 

-----Original Message-----
From: Ron <ronh at owt.com>
To: Dave Keillor <dkeillor at tconcepts.com>; virtualvairs at corvair.org
Sent: Tue, Aug 31, 2010 3:57 pm
Subject: Re: <VV> Oil Pressure and High Volume Pumps


"premature bearing wear."



What premature bearing wear?  Corvair bearings last a long time with the 

stock oil pump so what do you call "premature wear"?

RonH





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

From: "Dave Keillor" <dkeillor at tconcepts.com>

To: <virtualvairs at corvair.org>

Sent: Tuesday, August 31, 2010 10:44 AM

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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