Hi,
This is, indeed , a very interesting thread..When I was racing in the
SCCA club races in the mid 60's, we had to really watch the pressure and
volume going to the rod and main berings..The 1622ccMG series A engine in our
Elva Courrier had problems with too much pressure..We experienced situations
where the pressure would actually scour the bering material out of the bering
shells..actually scoop out the babbit material or at least peel the outter
layer of it off. We found tha careful radius work around the oil entry holes
to the berings, along with the correct volume and pressure of oil, when at
operating temps, would allow us to lubricate the engine without ripping the
bering shells apart..Has anyone run into this problem?
zym
The Blues is the only music Original to the United States of America.
--- On Wed, 1/13/10, Jerry & Maureen (Mo) <JCMC2006@suddenlink.net> wrote:
From: Jerry & Maureen (Mo) <JCMC2006@suddenlink.net>
Subject: Re: [Tigers] Tigers Digest, Vol 4, Issue 11 (oil pump)
To: "'Thomas Witt'" <atwittsend@verizon.net>, tigers@autox.team.net
Date: Wednesday, January 13, 2010, 6:48 PM
Well, of course you are absolutely right, if you increase pressure the
volume will increase. I guess the bottom line is that you always need to
have more pressure and volume than can leak out of all the bearings,
lifters, etc. at all RPMs and temperatures.
Jerry Christopherson
9473187
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of Thomas Witt
Sent: Wednesday, January 13, 2010 2:50 PM
To: tigers@autox.team.net
Subject: Re: [Tigers] Tigers Digest, Vol 4, Issue 11 (oil pump)
Interesting discussion. Wouldn't volume increases be limited to the
passage diameters? And then by the amount of leakage at bearings, lifters
rockers etc.. Or is it that the leakage points exceed the capacity of the
oil passage? Frankly I don't know.
It seems if you have any oil pressure at all the oil passages must be full
and then only pressure would increase volume. What I'm trying to get at is
it seems volume and pressure have to go hand in hand and ultimately aren't
independent of each other. But, I guess (excluding the relief valve
setting) a higher volume pump would ultimately have more potential pressure
capability also.
My mental reasoning is starting to seem like the gears in the oil pump.
Regardless of rotation they keep meet up at the same point.
Tom
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