ProComp/Speedmaster aluminum heads

I mean, I'm willing to change my thinking, but somebody is going to have to offer some science. Nobody is arguing tire or balloon deflation with cooler temps = less pressure. Only explanation I'm seeing being offered is the process happens so fast that the drop in temp doesn't lose pressure???? Yet, heat crossovers are blocked and air gaps are used and the air moves MUCH faster through the intake which is feeding 8 cylinders than the air moves through a single cylinder on a 4 stroke.