Date:         Fri, 17 Aug 2001 16:32:40 -0400
Reply-To:     Michael Townsend <townsend@RTP.ERICSSON.SE>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Michael Townsend <townsend@RTP.ERICSSON.SE>
Subject:      Re: fuel pressure regulator and manifold vacuum experiment
Comments: To: Matthew Pollard <poll7356@UIDAHO.EDU>
Content-Type: text/plain; charset=ISO-8859-1

OK,

No, it was measured with only one guage.  One guage that is not calibrated
every year to NIST standards.  That is my dilemna . . . is 10% (+/- unknown
guage calibration) enough to worry about spending $75 for a new regulator?
Should I spend $90 and get an adjustable regulator like Robert did and set
it with his guage?  Could 10% too high pressure contribute to my low
around-town gas mileage, along with my dribbly injectors?  In terms I am
used to, 20 * log (32 / 29) means I am only 0.9 dB over spec!

Maybe I should buy my own guage ($35) and compare it to Robert's to at
least get a reading from two instruments.  Then, I can buy the adjustable
FPR ($90) and have my own guage to set it.  My new remanufactured fuel
injectors ($193) will enjoy it.  After spending about $600 (Thanks George
Jr.) on my AC system, my walletectomy is about complete -- the patient is
dead.

Does it ever end?  :-|

Michael
Durham NC
90 Carat Moneypit

----------
> From: Matthew Pollard <poll7356@UIDAHO.EDU>
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: fuel pressure regulator and manifold vacuum experiment
> Date: Friday, August 17, 2001 4:03 PM
>
> > I have one of these vacuum guages and I have borrowed Robert Lilley's
fuel
> > pressure guage, so I will give your test a try next week.  I measured
it
> > last weekend at 32 psi unconnected and 39 psi connected -- slightly too
> > high but not enough to worry about, I hope.  I forgot to plug the
manifold
> > vacuum hose, though, so I need to repeat this measurement.  (What does
the
> > g stand for in psig?)
> >
>
> Wait!  Slightly too high? Like how much? 3psi is about 10%... follow that
> through and it means 10% more gas in the injectors.... It should be dead
> one spec.  A bit high (on two independent gauges) is not acceptable. I've
> been down this long road before....