It sure is nice not to deal with bladders unless you really see no better solution.
They have many faults, but one of the worst is they can't ramp up fuel delivery based on demand like crankcase pressure [or tuned pipe pressure] can.
A really neat device to "tame" bladders is a diaphram actuated check valve that operates off of crankcase pulses. It's almost like having timed fuel injection. It broadens the needle like you wouldn't believe. A local flyer / machinist used to make them for .36 Combat engines. They tuck right inside the recessed rear cover of the engine. Fuel can't pass through them unless the prop is turning, so they also cure accidental flooding.
Last edited by combatpigg; 06-30-2014 at 11:24 PM.