I am making 60 pounds hot at speed, 100 if I rev it cold and 20 hot at
800RPM. The reason I am getting such high pressures is because I am using
the metric oil pump and that is the weakest spring that it comes with. I am
planning to trim it to lower the pressure but I wanted to know the
ramifications until that time.
James Nazarian
71 MGB Tourer
71 MGBGT V8
85 Dodge Ram
----- Original Message -----
From: "Telewest (PH)" <paul.hunt1@blueyonder.co.uk>
To: "James Nazarian" <jhn3@uakron.edu>; "v8" <mgb-v8@autox.team.net>
Sent: Monday, June 23, 2003 11:41 AM
Subject: Re: Hydraulic lifters
> Usually excessive revs is said to pump up the lifters (although looking at
> the design of the lifter I can't see how unless one is getting valve
> bounce). The engine pump presents oil to a cavity that the lifter draws
its
> supply from or rejects as required in order to take up the clearances,
> unused oil leaks out from between the lifter and the crankcase and drops
> back into the sump. Presumably the lifters 'leak' at a small rate which
> allows the reducing clearances on a warming engine to also be compensated
> for. I *suppose* if one got the pressure high enough one could defeat
these
> leakages, but it would have to be pretty humongous. What are you getting?
> Why isn't the pressure relief valve controlling it?
>
> ----- Original Message -----
> From: "James Nazarian" <jhn3@uakron.edu>
> To: "v8" <mgb-v8@autox.team.net>
> Sent: Thursday, June 12, 2003 7:26 AM
> Subject: Hydraulic lifters
>
>
> > Here is a problem I would love to have on my stock B...I can't get the
oil
> > pressure on my V8 low enough. I'm wondering, thought, does too high an
> oil
> > pressure pump up the lifters and effect valve function?
///
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