On 11/28/2012 8:42 PM, marty sukey wrote:
> On the subject of vents. We autocross the spitfire some also and the hard
> jolts back and forth would tend to slosh gas out the vent tube even when we
> ran it up and looped it a couple of times. Since it exited the trunk floor
> near the exhaust it was not a good combination.
This would seem to be a perfect application for a vacuum break check
valve. There are fuel-proof check valves of this type available, and in
operation, they are normally closed until there is a differential
between atmosphere and the tank interior, then open just long enough to
equalize pressures. One of those installed before the loop in the vent
tube would effectively end the problem of fuel sloshing out.
Maybe something like this:
http://www.mcmaster.com/#spring-check-valves/=kda0b8
A differential of a third of a psi to open would probably be negligible
as far as fuel delivery goes, and it's doubtful sloshed fuel in a
vertical pipe would cause it to open. The oil- and diesel-proof valve
might not last quite as long when used with gasoline, but, they're
pretty cheap compared to the cost of the fuel cell--or the cost of
hauling to an event and then getting black-flagged for leaking fuel.
Cheers.
--
Michael Porter
Roswell, NM
Never let anyone drive you crazy when you know it's within walking distance....
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/fot/mharc@autox.team.net
|