...sounds about normal for a Spit (20 at idle hot)
20/50wt oil will keep it up a bit but at low rpms oil
press IS very minimal.
Both my 75 Spit and my 73 GT6 drop top 20-25 psi at idle
Paul Tegler
wizardz@toad.net
www.teglerizer.com
----- Original Message -----
From: <jdgar0649@aol.com>
To: <spitfire_enthusiast@yahoogroups.com>; <spitfires@autox.team.net>
Cc: <nass@yahoogroups.com>
Sent: Sunday, March 09, 2003 11:46 PM
Subject: >>NASS Oil Pressure Question?
> Hello to all!
> I am hoping that someone can help me solve a mystery.
>
> I am running a '72 bigcrank 1300 right now, and have no idea of its
> history other than what I have done (nothing internal-as I am planing to
> rebuild my small crank).
> Anyway, I have plenty of oil pressure right when I start up the car
> and for ten minutes or so, but as I drive - or sit and run up the rpm in
the
> driveway- the oil pressure starts to drop off. It starts out at about 80
psi
> at 3500 and warm, (that is the best I can tell on the Smith's gauge) and
over
> time drops to about 40psi at 3500 and 20? at idle. Is this typical of bad
> bearings or is it something else? Could it be a problem with too much
> crankcase pressure? Hopefully I will have the problem solved in a few
weeks
> when I can get the other engine in place, but I would like to keep this
one
> as a spare.
>
> Thanks
> Joe Garrison
> Edmond, OK
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