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Re: [Tigers] Fuel Pump Pressures

To: "'Stu Brennan'" <stubrennan@comcast.net>, "'Tiger Net'" <Tigers@autox.team.net>
Subject: Re: [Tigers] Fuel Pump Pressures
From: " Ron Fraser" <rfraser@bluefrog.com>
Date: Thu, 12 Apr 2012 23:45:10 -0400
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Thread-index: Ac0ZGve/SHOQdwWsRJaD622FBy1cOQAC0Trg engine=2.50.10432:5.6.7498,1.0.260,0.0.0000 definitions=2012-04-12_05:2012-04-12,2012-04-12,1970-01-01 signatures=0 spamscore=0 ipscore=0 suspectscore=2 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=6.0.2-1203120001 definitions=main-1204120379
Stu
        If the Facet fuel pump you have is working just fine, why are you
replacing it or are you just looking for a spare?
I have a Puralator cube fuel pump, made by Facet I believe, in my Tiger
right now, works just fine.

15 GPH will support around 200 HP so you need at least 15 GPH.  Yes, the
stock SU pump worked around 2 psi max.

I have one reference that indicates a stock Ford Fuel pump should deliver
3.5 - 6.5 psi.   I believe the stock Autolite 2 bbl carb will work just fine
with 2 - 4 psi fuel pressure.

Ron Fraser

-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of Stu Brennan
Sent: Thursday, April 12, 2012 10:02 PM
To: Tiger Net
Subject: [Tigers] Fuel Pump Pressures


I was thinking of replacing the ancient Facet fuel pump Ibve had longer
than my Tiger (and thatbs a  long timeb&).  This Facet had no part number
on it, or spec.  It doesnbt flood the carb, and doesnbt fall behind when
driving. Thatbs all I know.

The spec for a stock fuel pump for my Tiger is 15 GPH, 48 inch head max.
What does that mean, pressure wise?  I googled for a conversion method and
found an equation.  Depending on the density of the fluid you are basing the
pressure on, this calculated to about 1.2PSI for gas, or 1.7PSI for water.

So our pumps deliver 15 GPH at somewhere between 1 and 2 PSI?  Is this
correct?

Looking through the catalogs, I found a variety of Facets at Pegasus.  All
kinds of pressures and delivery volumes.

The one closest seems to be Facet 40104:  15 GPH, 1 PSI typical ,  max 28
GPH, max pressure 2.5 b 4.5 PSI

This is for street use on a stock 2 barrel 260.  I donbt want to go to
higher pressures and have to add a regulator before the carb.

Does any of this make sense?  How high a pressure can a stock carb stand
without problems?

Stu
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