I would add a vent; preferably the same size as the feeds from the fuel
pump. You can't get the fuel out if you can't get air in to replace it..
Easy enough to do if it has one of those large caps. Remember to cross the
vent line to prevent spillage in case of a rollover...Good Luck.
----- Original Message -----
> I'm upgrading my fuel system to a 140 gph pump and a new fuel cell. The
> pump uses two 1/2" (AN8 ?) pickups, a 1/2" main supply line (with
> regulator), and a 3/8" (AN6 ?) return line. Most of the fuel cells seem
> to have two AN8 outlets, and an AN6 on the top. I assume the AN6 would be
> used for my return line. Does the tiny vent in the filler cap allow
> enough air to flow into the tank with the pump I'm using, or should there
> be a second AN6 installed on the top of the tank for another vent?
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