| Re: [GMCnet] High volume oil pumps [message #246357 is a reply to message #246348] |
Fri, 04 April 2014 07:35   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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OK, now it's somebody else's turn to rattle Bob's chain just a tad -- We
always get such great information when we wake him up!
Ken H.
On Fri, Apr 4, 2014 at 2:25 AM, Bob Dunahugh <yenko108@hotmail.com> wrote:
> The main, and rod bearings will pass the same amount of oil at 700 RPM as
> at 3000 RPM. As the bearing clearance remain constant as long as the oil
> pressure remains the same. The output of the oil pump goes up as the RPM's
> increases. At idle. The relief valve is generally closed. ( Except at start
> up with a cold engine. ) This can be observed on the oil pressure gauge.
> You can also observe when the relief valve opens as the RPMs increase..
> The oil pressure gauge will also increase. There will be a point that the
> gauge will stop climbing. Even though the RPMs continue to increase. That
> is the point that the relief valve starts to send the excess oil back to
> the pan. With the OEM pump in place. And if you pay attention to what your
> dash gauge is doing. You can get indications of the condition of your
> bearings, and pump. If you have a high volume pump. The relief valve is
> bypassing oil most of the time.This will decrease the movement of the
> dash guage. Some guys get upset bec
> ause of the gauge moves to much. When it moves. It's telling you a store
> on the health of your engine. A static gauge due to a high volume pump is
> saying nothing . And can mask issues that are building up internally.
> Personally. I like it that my dash gauge is communicating to me. As rorthe splash oiling systems. Yes. Way back in time. A splash system worked in
> car, and truck engines. But that wasn't the kind of splash that we have
> been discussing. There was more to that system then oil just flying
> around the crank case. And that oiling system worked well until
> compression ratios got above 5.2 to 1. As for the Briggs. Low compression
> with very little weight in the reciprocating mass. That's what made that
> work. Anyway. That's my input.Bob Dunahugh
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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