I don't think most people understand why a double pumper could perform better than a velocity control carb when throttle bore and venturii are the same. if a double pumper and a velocity control (same cfm/venturii/throttle bore) are wide open at max power then there won't be any power difference. a double pumper MAY produce more mid-range but that's just an indicator of the engine wanting more air quicker and the carb isn't big enough to begin with. this is why I like multi-carb. have your cake and eat it too. get's you out of the single 4bbl cfm b.s.