| [GMCnet] Vapor lock cured (long) [message #181692] |
Sat, 25 August 2012 09:56  |
Gerald Work
Messages: 102
Registered: June 2010
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I tried a Toro mech fuel pump with the return line some time ago and found it did not stop the vapor lock as it was supposed to do. An electric fuel pump just forward of the selector valve that I turn on only when needed does stop it. This three thousand plus mile trip is a good example. While in Canada where we could run on no ethanol gas I never experienced vapor lock even pulling the 13% grades or the 11% 20km grades when it was hot. Got back to the states on premium crap gas and experienced vapor lock on long hills when hot. Flip on the electric fuel pump and the vapor lock instantly stops. Flip it off at the top of the hills and continue on. Works for me.
Jerry Work
The Dovetail Joint
Fine furniture designed & hand crafted
in the 1907 former Masonic Temple building
in historic Kerby, OR
Http://jerrywork.com
..............
Message: 5
Date: Sat, 25 Aug 2012 08:32:48 -0400
From: Ken Henderson <hend4800@bellsouth.net>
Subject: Re: [GMCnet] Vapor lock cured! I think? (Long)
To: gmclist@temp.gmcnet.org
Message-ID:
<CANsh1i1ScxPUeKqLYh7Yq7eqr5aseMutj0Qq2sSd7nettxm0Tw@mail.gmail.com>
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Wouldn't it have been simpler to use the Toro pump with the return already
built in? Very little likelihood of vapor lock from the mechanical pump up
to the carb.
Ken H.
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| Re: [GMCnet] Vapor lock cured (long) [message #181714 is a reply to message #181692] |
Sat, 25 August 2012 12:57  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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I suspect your results would have been the same with the more complex bleed
from the carb input filter; perhaps worse since it does not utilize a
calibrated orifice, as I suspect the Olds pump does, to ensure that not too
much pressure is lost. Ain't no substitute for pressure to keep gasohol
from boiling. :-)
Ken H.
On Sat, Aug 25, 2012 at 10:56 AM, Gerald Work wrote:
> I tried a Toro mech fuel pump with the return line some time ago and found
> it did not stop the vapor lock as it was supposed to do. An electric fuel
> pump just forward of the selector valve that I turn on only when needed
> does stop it.
...
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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