Actually, 8-10# at idle at operating temp would be quite acceptable. Rovers,
SD1
and later(Ihave no recent experience with pre-SD1 stuff) will not make 30# at
idle
unless there is something unusual in the oiling system. A 3.5L TR8 engine that
I
recently sold would make 25# at cold idle, stock 70k engine, but at normal
temp it
was down to 10 as expected. Be cautious about using high viscosity oils. The
gear
drive has known limits and attempts to make the system produce high pressures
can
lead to failure. The system is designed to move volume, not make pressure. My
experience with bottom ends for the race car carefully assembled with components
properly machined, flow restrictors in the heads, relieved passages in the
block,
and a pressure regulator on the relief valve resulted in some very high cold
idle
pressures, which dropped below 20# at temp. John
Larry Hoy wrote:
> Lets see if I can sort this out. This gets confusing so hang on.
>
> Glen Wilson writes:
>
> >Larry,
> >
> >Pardon me if I'm jumping into this thread in the middle and have missed
> something, but 8-10 psi oil pressure at idle doesn't sound normal to me.
>
> Glen wrote the above because I posted the following question.
>
> >John, your reply was regarding the 8-10 pound oil pressure at idle, what
>would
> be the typical pressure at driving speeds (2000-3000 rpm)?
>
> I asked the question because John had posted the following answer and I
>thought
> he was responding to the idle oil pressure:
>
> >Your pressure is about what is to be expected. The Rover motor does not
>make
> high pressures.
>
> John was replying because David Brown stated:
>
> >I recently installed an oil gauge and discovered that my NEW (well, 17K miles
> now) 4.6 block is only getting 8-10 psi at idle.
>
> And he further stated:
>
> >my cruise pressure is around 35-40 psi, so not too bad.
> >
> >What can I do to beef up the 3.5L oil pump?
>
> Whew, did you figure that out? I did my research and found the *1961 Buick*
> engine should be running about 33 lbs. at 2500 rpm (thanks to others who
> responded and gave me similar numbers). But I did not find out any info on
>idle
> pressure. However the brief time my engine was running it ran around the 30
> mark at idle. Seems to me that 8-10 lbs at idle is low.
>
> Larry Hoy
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