The adjustable relief valve mechanism that I got from APT uses a spring about
the same length as the normal relief valve spring. Also as with the normal
relief valve it uses a cup to seal the seat. No ball bearing. All that is
being done is to vary the pressure of the cup on the seat.
Mike
--- On Wed, 8/10/11, Hal Faulkner <frog.aye@gmail.com> wrote:
From: Hal Faulkner <frog.aye@gmail.com>
Subject: Re: [Spridgets] High Oil Pressure, The Saga Continues
To: "Michael MacLean" <rrengineer.mike@att.net>
Cc: spridgets@autox.team.net, "Guy R Day" <grday@btinternet.com>
Date: Wednesday, August 10, 2011, 10:40 AM
Michael,
It is my understanding that the adjustable oil pressure relief valve moves the
outer end of the spring in, thereby necessitating shortening of the spring to
keep the o.p at a normal level. Also, if you have replaced the relief
"piston" with a steel ball it is effectively longer than the piston
compounding the problem. I believe that Vizard mentions this.
Hal
On Wed, Aug 10, 2011 at 2:22 AM, Michael MacLean <rrengineer.mike@att.net>
wrote:
Well, maybe I was too loose with that word "calibrated". It is a new test
gauge. I trust the figures from it more than what I read off the Smiths
gauge
in the car.
Mike
--- On Wed, 8/10/11, Guy R Day <grday@btinternet.com> wrote:
From: Guy R Day <grday@btinternet.com>
Subject: Re: [Spridgets] High Oil Pressure, The Saga Continues
To: "Michael MacLean" <rrengineer.mike@att.net>, spridgets@autox.team.net
Date: Wednesday, August 10, 2011, 8:11 AM
If it is a calibrated test gauge and the calibration is within certification
dates then surely the figures should be accepted as being about right?
Guy R Day
----- Original Message ----- From: "Michael MacLean"
<rrengineer.mike@att.net>
To: <spridgets@autox.team.net>
Sent: Wednesday, August 10, 2011 7:43 AM
Subject: [Spridgets] High Oil Pressure, The Saga Continues
> I finally got a calibrated oil pressure test gauge and hooked it up
> tonight to my Bugeye. If you remember, I was getting 120 PSi at speed and
no
> less than 90 PSI at idle. I took the car for a drive tonight. The
ambient
> temp outside is less than 70 degrees and the car did not warm up after
driving
> it for a half hour more than 170 degrees. The idle was about 37 PSI and
at
> speed it would go to 70 to 75 PSI. I'm not sure how accurate this gauge
is,
> but I like these numbers a lot better. Incidently I re-installed the
normal
> oil pressure relief valve for the test. Tomorrow I am going to re-install
the
> adjustable relief valve and see if I can get it down to a more ideal
> pressure. After that I am going to do an oil and filter change and see
what
> those results are like.
> Mike MacLean
> 60 Sprite
> 56 BN2
> 02 Heritage Springer
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