Hmmm....My take? The whole magnet thing intended to help "pressure build" for the "ram air feature". Now let us just think and reason for a few moments ...... How much pressure is actually needed and at what speed to gain any # of performance? Is there a BIGGER benefit of more fresh air at any given time or during specific throttle openings? The flapper being held closed until X pressure (REGARDLESS OF SPEED or PRESSURE) may be irreverent/non-existent BUT the amount of cooler or volume of air at the same given speed may be a bigger benefit. Yes? No?