| [GMCnet] Fuel filter question [message #216015] |
Sun, 28 July 2013 17:52  |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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Senior Member |
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From my positive experience with a front mounted fuel filter/water separator I think the greatest benefit is fuel cooling. Certainly it is good to have an additional really large fuel filter as well, but with only one very brief vapor lock issue in 3400 really hot miles from sea level to nearly 5,000 feet something helped. Mine is mounted just outboard of the brake cylinder on the foot well. Fuel is pumped (or pushed) from the tank selector valve to this large filter and from there to the mechanical fuel pump and up to the carburetor. Rubber lines going to the filter and from the filter to the fuel pump. Steel line (insulated) from the fuel pump to the carb.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com
541-499-1027
541-592-5360
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Message: 3
Date: Sun, 28 Jul 2013 07:28:33 -0700 (PDT)
From: Jp Benson <chocomo99@yahoo.com>
Subject: Re: [GMCnet] Fuel filter question
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Message-ID:
<1375021713.1166.YahooMailNeo@web124504.mail.ne1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Emery,
It can be frustrating trying to get technical info when you can't order by year, make and model.? Good point about the ethanol/water absorption.? I bought a NAPA 4770 filter adapter to use the extra ports for a fuel temp sensor.? They couldn't answer the fuel compatibility question and finally wrote me up as a "problem incident".? Finding the right filter that fits on the adapter and in the allotted space has been tougher than I thought.
Thanks for your help,
JP
> ________________________________
> From: Emery Stora <emerystora@mac.com>
> To: gmclist@temp.gmcnet.org
> Sent: Saturday, July 27, 2013 4:49 PM
> Subject: Re: [GMCnet] Fuel filter question
>
>
> Why?? Sure they would work but with the amount of ethyl alcohol in today's gasoline it will absorb all water so you don't need a water seperator.
> I would think it would be a waste of your money.
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] Fuel filter question [message #216246 is a reply to message #216015] |
Tue, 30 July 2013 09:42  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Jerry,
You noted:
"Fuel is pumped (or pushed) from the tank selector valve to this large filter and from there to the mechanical fuel pump and up to
the carburetor."
Did JimB install a little square Facet fuel pump between the selector valve and the tank that comes on when you switch to AUX?
This would explain why you didn't have any vapor lock problems to speak of. He installed one on Double Trouble and the only problem
I had was going up Eisenhower pass with low fuel in the AUX tank last summer. If I filled up in the mornings and hit the mountains
with a nearly full tank it worked great.
Regards,
Rob M.
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Work Jerry
Sent: Sunday, July 28, 2013 5:52 PM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Fuel filter question
From my positive experience with a front mounted fuel filter/water separator I think the greatest benefit is fuel cooling.
Certainly it is good to have an additional really large fuel filter as well, but with only one very brief vapor lock issue in 3400
really hot miles from sea level to nearly 5,000 feet something helped. Mine is mounted just outboard of the brake cylinder on the
foot well. Fuel is pumped (or pushed) from the tank selector valve to this large filter and from there to the mechanical fuel pump
and up to the carburetor. Rubber lines going to the filter and from the filter to the fuel pump. Steel line (insulated) from the
fuel pump to the carb.
Jerry
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Fuel filter question [message #216249 is a reply to message #216015] |
Tue, 30 July 2013 10:09 |
George B.
Messages: 213
Registered: February 2012
Karma: 1
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Senior Member |
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Jerry, would love to see some pics of your filter setup and part numbers - thanks
George Butts
Las Vegas Nevada
73 "Custom 26' Q" & 76 23' Birchaven
71 Honda 600 Coupe & 01 Tracker Toads
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| Re: [GMCnet] Fuel filter question [message #216289 is a reply to message #216015] |
Tue, 30 July 2013 14:10 |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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Senior Member |
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Jerry,
It seems that your experience with the large front mounted fuel filter is answering my question back in mid June about the effectiveness of a FUEL COOLER in solving the GMC vapor lock problem.
Several netters had THEORIES explaining why the cooler wouldn't help; but no one had actual experience with a cooler installed on the GMC.
I would think that an actual cooler in the airstream would be even more effective than your filter.
Thanks for documenting your experience.
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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| Re: [GMCnet] Fuel filter question [message #216296 is a reply to message #216015] |
Tue, 30 July 2013 15:09 |
Jim Galbavy
Messages: 1443
Registered: August 2007
Karma: 7
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Senior Member |
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Jerry, I've been running a fuel filter/water separator for about 9 years like what you describe and have said many times that it seems to cool the fuel. Mine is a Parker Hanifin.
jim galbavy
'73 x-CL ANNIE
Lake Mary, FL
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