Help on fixing a vapor lock!!!
Agree, otherwise it would suck.
I got the pun! Thanks for the solid info. Piecing it all together, having the return filter behind the pump won't actually do much of anything since fuel under most conditions won't be heated enough (even under a mild suction) to cause much in the way of evaporation, at least not nearly as much as fuel after the pump (at 5-7 psi), picking up heat from the pump mechanism and absorbing heat from the engine.
I'm looking to install the return filter because my charcoal can is long gone and I have the return line wide open and gas fumes are stinking up my garage. My existing fuel filter is on the suction side of the pump. At some point soon I'm going to replumb my fuel lines.
I did notice yesterday that the stock 1/4" hard return line appears to have an orifice in it already where it would connect to the charcoal canister. The hard line steps up to a larger OD to accept 5/16" ID tubing, but appears to have a much smaller ID/orifice. I didn't measure but it looks awfully close to the orifice size I see when I peer down the fuel filter.
