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[Greg Hermann]

>Thanks Greg!  I think you have put your finger on a problem that I have
>been having.  Please elaborate on the float vent; on what junk cars can I
>remove one and where do I look for it on the car?

I dunno of any cars that have used one!!! :-)

Basically all it is is like the float bowl of a carb working in
reverse--the float chamber would be connected to the high point of the fuel
rails--when the float chamber is full of liquid fuel, the float rises, and
closes a needle valve. The outlet side of the needle valve is connected to
your vent line back to the tank. If enough vapor collects for the float to
drop, the needle valve opens, and the vapor goes bye bye into the vent
system.

There are lots of float vents out there for various industrial piping
systems, but most weigh about 20 pounds, min.

There are tiny little ones out there, made out of sheet metal, for domestic
hot water heating systems, which would not take the fuel pressure--general
environmental/vibration conditions under the hood at all.

I have found one, made by Honeywell, which is rated 150psi, 250 degrees F,
which is OK as to  bulk/weight, and they rate it as OK for
water/glycol/petroleum based heat transfer fluids, so I think it MIGHT be
OK for use in an automotive fuel system. Have not tried it out yet--and I
would be pretty sure that Honeywell would have a whole litter of kittens if
they found out their product was being used that way, so I am a little
reluctant to state the part # of it. But that should not stop anybody from
getting hold of a Honeywell "Tradeline" catalogue at a local HVAC /controls
wholesaler and figuring out which part it is!!

Been thinking about asking somebody that makes quality fuel system
stuff--mebbe Barry Grant-- if they would be interested in making them
specifically for our intended use. Prolly would have to go through a bunch
of BS to show them why it's a needed part--and that would be a real PITA.

Regards, Greg
>
>At 02:01 PM 1/29/99 -0700, Greg wrote:
>(snip)
>>But
>>if you are doing variable pumping alone, for $#% sakes, use a float vent on
>>the rails, so as to get the #$#% bubbles back to the tank!!!
>>
>>Regards, Greg