>From the earlier post today we can assume oil pressure on a 260 / 289 should
be between @ 30 - 60 lbs. from the factory.
The remote filter shouldn't reduce the pressure unless there's a leak. (He
said, not really knowing...)
So... the obvious question: have you checked your gauge? You implied the
shop used their gauge and a transducer.
Tom
On Mon, Aug 2, 2010 at 12:20 PM, Dave Munroe <dave@munroe.ca> wrote:
> Ok guys, the mystery continues.
>
> I have sought advice here about oil pressure and we have discussed this
> before. But now more intelligence has been gathered.
>
> My engine was built by a well meaning but as it turns out, inexperienced
> Brit mechanic in 2005. Amongst more serious problems,
> my engine's oil pressure also was below what I have come to believe is
> "normal" pressure for a fresh, quality re-build.(50 to 55 psi cold, 40 to 50
> psi hot with 10-30W oil). I was tired of, and concerned with, the O.P. gauge
> showing the needle far to far to the left of center.
>
> I had my engine removed and "blue-printed" by a knowledgeable and highly
> regarded local shop. They found and corrected the other, more serious
> problems, and when reassembled, put it on their shop dyno. During the
> rebuild they installed a new, standard oil pump on the recommendation of
> many on this list who responded to my earlier inquiries, to replace the high
> volume pump that I had installed in the first re-build.They also installed a
> large filter directly on the block for the several pulls the engine went
> through on the dyno. They had hooked-up a mechanical oil pressure guage and
> a transducer that fed into their diagnostic computer. My engine was showing
> 70 psi at 1500 rpm, and it rose to 75 at 5500 rpm (redline).
>
> Back in the car with the remote oil filter set-up, with new, large diameter
> hoses fitted, it shows 45 psi cold, and 25-30 hot at 3,000 to 4,000 rpm. I
> am at a loss to understand how the remote filter set-up could possibly cause
> this drop in indicated pressure. The only other variable is my pressure
> gauge, which is nothing if not consistent.
>
> I will appreciate any wisdom or suggestions as to what is going on and how
> to correct this low pressure problem.
>
> Thanks for your help,
>
> Dave _______________________________________________
> Tigers@autox.team.net
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/tigers/tkparker1941@gmail.com
_______________________________________________
Tigers@autox.team.net
Donate: http://www.team.net/donate.html
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
|