On Mon, 29 Sep 1997 23:00:58, -0500 GDWF22A(at)prodigy.com (MR RICHARD T
TRENK SR) writes:
>The 50 psi is obtained because the oil pump is making MORE volume than
>the
>bearing clearences can let pass, hence the high reading in the
>gallery.
snip....
>Race engine builders understand that engines need lots of cool oil
>through
>bearings to suck away damaging heat. To assure this, we make the
>bearing
snip....
>So I say onto you........if your engine is in pretty sound condition,
>fear
>not the lower psi oil readings you may be seeing. DO NOT install real
>thick oils to bring up the psi. This defeats the purpose of getting
>high
>volume through bearings. Continue with the NORMAL weights of oil
>according
>to your seasonal temp.
snip....
I agree with what Dick T. said for the most part, but would like to add
my own
angle on it.
With an oppropriately sized pump, reasonable bearing clearances, and
a functioning oil pressure relief valve, the bearings are both lubricated
as well as cooled by the oil that makes its way around the bearing
clearances. [Definition of massive oil theorem]
By increasing the relief pressure, the increased gallery pressure
will push even more oil around the bearing clearances, which cools
the bearings more yet. [Defintion of bearingus coolingus]
Also, when oil "or any other liquid" is pumped and compressed, the
work that was done, is stored in the oils pressure. The pumping of the
oil
creates heat, and dumping off the excess pressure has the effect of
dumping the heated oil, for no good reason back to the sump.
This is work done, for which there is no payback, nor reward.
[Definition of heata da oilipus nogetta nada backipus]
Most high performance engines like to have their pressures set
to 60 PSI idle or cruising. These engines typically have a
substancially larger volume oil pump to pump the larger volume
at the higher pressures. The added pressure and hence volume
correlates to increased bearing cooling, and less bearing wear.
[First correlary of race engine fluid seepage]
The Rootes Alpines cars had 40 PSI relief valves installed until 1968,
when
many of these valves began to stick open, and cause engine failures.
The quick fix was to re-design the oil filter base and relief valve, and
also this new valve had a higher relief pressure to make better
advantage of the higher capacity 5 main oil pump.
The "Hunter" type base and relief valve makes 55 to 60 PSI
oil pressure, and is far less likely to stick open.
[Definition of lowoilipressure meana kissa your MOTORa byebya]
Jarrid Gross
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