I've had no experience with Aerocarbs. I suspect it might given they are reputedly a calibrated "fuel leak" but I don't know. Guess it depends on the diameter of the vent and thus the amount of pressurisation. Someone else might chime in or you should contact the manufacturer for the definitive opinion. A simple vent in a cap will leak if upside in a prang. Use an aircraft designed one. I think these have some kind of a rubber flap arrangement that prevents this. Check out Aircraft Spruce.
John I will be running a areocarb on a corvair engine and was wondering if running ram pressure into the vent of the header tank will cause a problem with this carb. Should I be using just a vented cap instead. Steven Bedford Kr2s builder
