Although I agree with the reasoning, I disagree with the open container
theory as you are comparing to 100% immediatte usage(simply falling out of
the container), which is well beyond(i would imgine for most engines) that of
the actual requirement of a running engine. I have less then .100" hole with
a 1/8" line om it for a vent, and have never seen a lean reading at high rpm
(8000) in upper gears. Quite the opposite actually(via WB lambda readings)...
although all I have is a very slow 61 cubic inch gravity fed vehicle in
relation. Bench testing versus mathmatical consumption is simple enough to do
to ease your worries though(which is what a dedar friend made me do to ease
mine). I do agree that an excessive hole and line(to some extent), would not
be much of a disadvantage though.
Todd
> > Let's assume that a 1/2" fuel line will be maxed out, flowing as much
> > fuel as it can. What size hole/tube is needed for an air vent on the
> > tank so that the flow of fuel will not be slowed by pulling a vacuum?
> I dunno if I'd settle for that, Dick. When I pour fuel from my
> 5-gallon jug into the Oshkosh -- the spout on the jug is 1/2 - 5/8
> or so, and the air hole is about 1/8 -- and there's an obvious
> restriction, the fuel flows slowly-er than it would if the air hole
> were bigger.
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