Quote: 2. High pressure (above 28") is very sensitive to small changes, to the point of being "nervous" and showing flow changes for mods too small to actually affect power. 3. 28" showed the closest relationship between a change in flow to a change in power - as close to linear as he could get.
Would this tell us more about what we could expect from a head with ports far too small for the application? Like a 906 head going on a 540 inch engine?
IMO, that's a simple case of the head not having sufficient cross-section area for the cubic inches it's expected to feed ==> CHOKED
