well sort of
lets say a Z32 maxes at 1000CFM of air
and you run a big single GT 80 billion and it uses up 1400CFM of air
from 1000CFM onwards the AFM shows 5.1v so it maxes
so your load axis on your 20x20 map this may be say row 15 (near the bottom)
so from that point onwards it wont move up or down, becuase it cant show any more load
so you are left to 1 dimensional tuning - that is, the cell on the map will only move as RPM increases
so you can still tune, it wont magically lean out, you just have "less" load points to fine tune and adjust
the car wont go back, it wont melt rods etc, you just have less load points
now
lets say a 3bar map sensor that maxes at 58psi
and you run a big single GT 80 billion and it uses up 1400CFM of air and peaks at 18psi
from 18psi onwards the MAP shows 3.1v and never inceases
so your load axis on your 20x20 map this may be say row 15 (near the bottom)
so from that point onwards it wont move up or down, becuase it cant show any more load
so you are left to 1 dimensional tuning - that is, the cell on the map will only move as RPM increases
so you can still tune, it wont magically lean out, you just have "less" load points to fine tune and adjust
the car wont go back, it wont melt rods etc, you just have less load points
do you get it ?