Conversion to EFI : Fuel system

[andy quaas]

I had this heating problem with my truck.  If would run the tank down
to 5 gallons and stop at the gas station.  Now i had an open vent to
the atmosphere right in the top of the tank.  I filled up the tank (i
didn't even top it off), and when i came back from paying for it there
was all sorts of gas on the ground!  It came through the vent!  And a
lot of it!  I'd bet at least 1/2 gallon would spew out.

Moving your fuel lines to the outside of the frame would help cooling
while driving greatly.  Also insulating the fuel rails or fuel line by
then engine will help.  

Andy


---Ward Spoonemore <spoonie at deltanet.com> wrote:
>
> You guys do know there are a lot of cars out there that do not have
fuel
> return lines, Chrysler, and Ford for example use pressure regulators
that
> are in the tank.
> 
> You may be overlooking the fact that the fuel in the tank will reach
> something near underhood temperatures aft a relatively short time.
Probably
> about 150 Deg F. Common. (but wrong) thinking is that cold fuel will
be
> coming from the tank, Maybe in the Arctic. Obviously if you
circulate a lot
> of fuel through a hot environment the heat will transfer.
> 
> New car makers have a major probable with Carbon Can systems loading
with
> hot vapor from the tank. The ECM/PCM will enable can purge when it
thinks it
> can get away with a period of rich fuel, If you look at the Short
term fuel
> correction value you can see the engine going very rich until the
purge is
> done or disabled. using a late Camaro as an example the pressure in
the fuel
> tank will get high enough to blow the fuel cap out of your hand when
> removing the fuel tank cap !
> 
> So anything you can do to reduce fuel heating will make the emission
problem
> more manageable,
> 
> Ward
> 
> 
> 
> > -----Original Message-----
> > From: owner-diy_efi at efi332.eng.ohio-state.edu
> > [mailto:owner-diy_efi at efi332.eng.ohio-state.edu]On Behalf Of
> > Guenther,Max
> > Sent: Friday, March 19, 1999 7:11 AM
> > To: 'diy_efi at efi332.eng.ohio-state.edu'
> > Subject: RE: Conversion to EFI : Fuel system
> >
> >
> > What are you planning on using for the reserve tank? Thats my next
and
> > hopefully final hurdle.  Some guys here had suggested using part
of a
> > holley float bowl.
> > Max
> >
> > >----------
> > >From: 	Mitch[SMTP:ozyman at employees.org]
> > >Reply To: 	diy_efi at efi332.eng.ohio-state.edu
> > >Sent: 	Friday, March 19, 1999 9:16 AM
> > >To: 	diy_efi at efi332.eng.ohio-state.edu;
diy_efi at efi332.eng.ohio-state.edu
> > >Subject: 	Re: Conversion to EFI : Fuel system
> > >
> > >At 09:39 PM 3/18/99 -0500, Shannen Durphey wrote:
> > >>First off, I haven't read any of these books, but Bruce gives
> > >>practical advice, good for following.
> > >
> > >Yes.  I like Bruce's advice.  In addition to Knell's way, I am
> > also talking
> > >to a local friend of mine who has done this slightly differently.
 So I
> > >want to understand all angles.
> > >
> > >>Why not find an EFI factory tank that will fit under the Elky?
> > >
> > >I might be able to do this for the Malibu (not the El Camino,
it's not
> > >getting the TBI), for considerable cost.  But if I'm going to
> > put a V8 into
> > >a 240Z I'm going to have to solve this eventually.  That's why I
call the
> > >Malibu an EFI mule; I intend to experiment on it.
> > >
> > >>'Sides, the stock 66 tank doesn't have the charcoal canister
> > >>connections or return line, AFAIK.
> > >
> > >Doesn't have any of the necessary lines.  So you remove the
> > sender assembly
> > >and machine new holes.
> > >
> > >>  And if you have safety inspections
> > >>where you live, seeing non stock fuel system might make inspectors
> > >>nervous.
> > >
> > >Luckily, the State of California cares nothing about safety
(unless you
> > >want to light up a smoke in a bar).  All they care about are
> > emissions and
> > >the Malibu is exempt.
> > >
> > >Thanks for the replies.
> > >
> > >Mitch
> > >
> > >
> >
> 
> 

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