[Diy_efi] GM Fuel Pump / Tank Options

[Clair Davis]

Hmm... interesting.  I hadn't really thought about bending the plastic pipe,
just using it for the straight runs with formed
rubber/silicone/neoprene/whatever hose bits to make the turns.  That might
give me some options on how to handle things, though.

With regard to the brass or polyethylene fittings, should I tap threads in
to the tank before installing, or will the fittings cut their own threads
and seal better that way?  I can see how the brass MIGHT cut it's own
threads, but I'm guessing the poly fittings need threads to even start.  I'm
guessing the pipe thread will be sufficient in sealing itself, correct?
Would it be possible, or even necessary, to do a bit of plastic welding on
the poly fitting to make it that much of a tighter fit?

Thanks for the ideas, folks...

Clair


----- Original Message ----- 
From: "Ernest Buckler" <ebuckler at icehouse.net>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, August 28, 2007 12:17 AM
Subject: Re: [Diy_efi] GM Fuel Pump / Tank Options


> Gotta plug the ends real solidly to keep sand from shifting - on steel
> y'weld caps on.  And, major caution if yer gonna use heat - sand has to be
> DRY DRY DRY, otherwise you got yerself a steam bomb, plenty
> shrapnel-capable.
>
> Ernie B.
>
>
>
>
>
> ----- Original Message ----- 
> From: "sc7500" <sc7500 at sonic.net>
> To: <diy_efi at diy-efi.org>
> Sent: Monday, August 27, 2007 10:09 PM
> Subject: Re: [Diy_efi] GM Fuel Pump / Tank Options
>
>
> > Anyone have a resource for various DIA's and bends of fuel filler hose?
> >>
> >> You can buy polyethylene tubes from McMaster
> >> (what the gas tank is made from) It's a thermo plastic
> >> so you should be able to heat it to bend it but it
> >> might be hard to keep it from closing off on a tight
> >> bend.
> >>
> > An old timey trick that has never failed me is to fill plastic tubing
with
> > clean sand BEFORE heating and bending ~ it doesn't collapse.
> >
> > BTW, this also works for making thin wall exhaust tubing bends with
those
> > cheap Harbor Freight "pipe benders"...
> >
> > SC
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