[Diy_efi] Fuel Tank Modifications

[clair.davis at charter.net]

That little VW surge tank is pretty slick.  I really don't want a big supply
of fuel outside the actual tank, but that would probably be a decent
alternative.  I'm also still considering the possibility of buying a new
tank and installing some sort of baffle in it, something similar to what
maybe a 1LE Camaro Z28 or maybe Corvette has.  I just need to see if I can
find a detail of what that looks like.  To do that, (and keeping with the
DIY theme) I was looking at an adhesive like the ultra-light aircraft guys
use:
http://www.actechaero.com/index32.htm
Here it is in action:
http://home.hiwaay.net/~sbuc/journal/tanks2.html
Looks like it might work pretty well, even if you had to rivet the baffles
to the bottom of the tank, then glue/seal it down.  I suspect that you could
even use some sort of stock baffle assembly, I think Ford Escorts or
Topaz/Tempos have some sort of labyrinth thing that sits in the bottom of
the tank that the return line feeds in to that could be used.
Still, from a plumbing standpoint, the little surge tank might be the
simplest, especially if the regulator bypass was plumbed in to keep it full.
That just wouldn't be the best from keeping a cool fuel supply going to the
engine.  I'd like to eliminate the stock mechanical pump and not have a
low-pressure in-tank for simplicity, but that may not be avoidable.
Clair


----- Original Message ----- 
From: "Garrett P. Beauregard" <gpbeau at cox.net>
To: "A list for Do-It-Yourself EFI" <diy_efi at diy-efi.org>
Sent: Monday, December 29, 2003 7:40 PM
Subject: RE: [Diy_efi] Fuel Tank Modifications


> You'll definitely need either the surge tank or a baffled tank. I have a
> setup similar to what Clair describes and suffer fuel starvation under
heavy
> acceleration at 1/4 tank or less. It will be even worse with autocrossing.
> Does anyone have a lead on someone who reworks stock tanks with baffles
for
> EFI? One list member mentioned Tanks Inc. but don't know if they only do
> custom tanks or rework stock tanks. I, for one, would like to keep the
stock
> tank and not have to rig up a custom cell or tank.
>
> THANKS
>
> Garrett
>
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
> Behalf Of bill
> Sent: Monday, December 29, 2003 9:10 AM
> To: A list for Do-It-Yourself EFI
> Subject: Re: [Diy_efi] Fuel Tank Modifications
>
>
>
> ----- Original Message -----
> From: <clair.davis at charter.net>
> To: "diy_efi" <diy_efi at diy-efi.org>
> Sent: Monday, December 29, 2003 12:07 AM
> Subject: [Diy_efi] Fuel Tank Modifications
>
>
> > Sort of a simple question, but what modifications will I need to make to
> my
> > fuel tank prior to installing my EFI kit?  The car in question is a 69
> > Plymouth Valiant, and in particular, I'm wondering if I'll really need
any
> > sort of baffles in the tank to keep fuel around the pump pickup?  The
pump
> > will be external, using the stock pickup and sending unit.  The return
> line
> > will be plumbed in to the pickup mounting flange.  Where can I find some
> > guidance on how/where to install these baffles, and whether or not
they're
> > really necessary?  I will be autocrossing this car, so high lateral g's
> will
> > be experienced from time to time.  For the races, I plan to keep the
tank
> > full, but I can safely say there will be times in "real life" where I
take
> a
> > corner and the tank isn't going to be full.  Any advice or links
> > appreciated.
> > Clair
> > 69 Valiant with 7730/MPI pending
> > Fort Worth, TX
> >
> > _______________________________________________
> > diy_efi mailing list
> > diy_efi at diy-efi.org
> > http://lists.diy-efi.org/mailman/listinfo/diy_efi
> you will probably need to build a surge tank and plumb the electric fuel
> pump from that (a fuel cell available from most speed shops) will work ok,
a
> bonus is you can use the factory fuel pump to keep the surge tank full .
> Another way would be a custom fuel tank from a company like tanks inc.
(look
> in hot rodding magazines for their address, I don't think the are on the
web
> yet) with a intank fuel pump great for the "sleeper" look
>
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