return line to gas tank

[mrvette]

Nah, I can attest with my'72 vette that the reutren line on a full tank of gas
tends to heat up the gas, and expand the tank, forcing a leak conditon....when
the tank is somewhat enptied,  the fumes disappear....
believe me I have monitored this condition VERY carefully over the 3 years this
mod with DPFI has been in effect, and tried all sorts of thigs....it's not
really a leak, just escaping fumes...a real pain in the ass....you know the cold
gas goes through the warming of the FI rails on the engine, and goes back heated
to the tank,  gradually it all heats up, and forces gasses to escape,,.....the
old type of evap canister, allthough operationg correctly is not up to the job, 
hence the late model FI cars have a bunch of capillary tubes in the system...
a real weird piece of engineering, of which I have no knowledge....
anyone out there who knows of these things....?     

GENE

Dave Balfour wrote:
> 
> I was under the impression that the return line is there to insure
> that.there is movement of fuel to help lubricate and cool the in_tank
> pump. dave balfour
> -----Original Message-----
> From: mrvette <mrvette at bellsouth.net>
> To: diy_efi at efi332.eng.ohio-state.edu
> <diy_efi at efi332.eng.ohio-state.edu>
> Date: Monday, October 19, 1998 3:47 PM
> Subject: Re: return line to gas tank
> 
> >As a matter of fact   DO   aim it toward the fuel pick up, and if you
> can easily
> >put some sort of a 'trap' in the pick up point to hold the fuel as
> you corner on
> >a lo-empty tank,   these recirculating systems  'use' much more fuel
> than a
> >straight carb feed setup,  so any slosh problems are greatly
> >magnified....frankly it's a pain in the ass even for auto
> companies.....GENE
> >
> >Stowe, Ted-SEA wrote:
> >>
> >> hi.
> >>
> >> I'm just about to go out and find a shop to do some light brazing
> or
> >> welding, to add a fuel return line to my mgb gas tank. I bought a
> used
> >> sender/fuel line unit, so I could take the fuel line off that and
> add it to
> >> the existing one in my car. before I do this, are there any rules
> about fuel
> >> return lines ? other than don't point it at where the float would
> be sitting
> >> ?
> >> I am trying to minimize the surprises/features.
> >>
> >> thanks, Ted Stowe
> >
> >--
> >
> >
> >                                ____________
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-- 


                                ____________
Fun under the sun in          //~~~~~~~~~~~~\\
Jacksonville, Fl.  :-)))     //______________\\
                       /~~~---~   |      |   ~---~~~\
                      /|    /______\____/______\    |\
                    (( | /      |          |      \ | ))   
     Mako 'Vettes    | \============================/ |   
 Shift better with   |\ \\[  ]    |mrvette|   [  ]// /|
     Automatics      | \/+========================+\/ |
                     |~==============================~|
                     |_____|                    |_____|
-------------------------------------------------------------------