Originally Posted by dadsr4
Intake vs outflow air is determined by the area of the openings, not air pressure, which is equal at both openings. How does one "pre-set it" by elevation? Wouldn't one setting work for all elevations?
It's not about air pressure, it's about combustion. There is less oxygen at higher elevations, thus less combustion. Thus you need more intake at a higher elevation to get the same amount of oxygen (combustion) that you'd have at a lower elevation.