Home » Public Forums » GMCnet » Vaporlock baseline temperatures
| Re: [GMCnet] Vaporlock baseline temperatures [message #211732 is a reply to message #211731] |
Thu, 20 June 2013 19:00   |
Ronald Pottol
Messages: 505
Registered: September 2012
Location: Redwood City, California
Karma:
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Senior Member |
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What about running the return line through a radiator or some such, and
then back to the tank?
On Jun 20, 2013 4:58 PM, "George Beckman" <gbeckman@pggp.com> wrote:
>
>
> Michael Morton wrote on Thu, 20 June 2013 14:36
> > Guys, I just can't believe that everyone keeps trying to over engineer
> this vapor lock problem). All that is required is a simple fuel return
> line. Just tap and install a fitting in the top of the fuel filter housing
> at the carb, install another one in the fuel filler neck, located in the
> engine compartment under the drivers seat and connect the two with a 1/4
> inch line. I did this 2 years ago and haven't have a hint of vapor lock
> problem since.
> >
> > Mike Morton
> > 1975 Eleganza (Sloopy)
>
>
> I agree with Mike in the KISS method. A number of us have fuel injection
> and the throttle body EFIs all have a fuel return. I personally have not
> had vaporlock, but I believe some EFI users have had vapor lock problems.
>
> It is this that leads me to believe that _if_ you can get the pump to
> pump, all will probably be well. It is the _if_ that is the problem. Pumps
> have higher pressure after they pump but the real problem is the lower
> pressure before the pump. Lower pressure equals lower boiling temp. (of
> course the release of pressure in the carb bowl could also be a problem)
>
> I am going to start taking tank temps with my laser thermometer. One day I
> was stopped fiddling with something and happened to put my hand on the
> front tank. It was surprisingly cool to the touch. It was not a hot day but
> not winter either but the tank was cool. I am getting curious. ( my tanks
> are not painted or anything. They are the color of 40 years under a coach.
> ) I have front mufflers which can't help. I do have heat shields next to
> the exhaust.
> --
> '74 Eleganza, SE, Howell + EBL
> Best Wishes,
> George
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1973 26' GM outfitted
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