twisted minis
+1y
You have to think about the leverage. That Mazda had a 2.5:1 lift ratio. The bag still moves the same amount, 8 inches. However, at the end of the bar, the pivot is moving farther than that because it is farther away from the bag.
My truck is set up with a 1.5:1 ratio, gets around 10-11 inches of lift at like 40 PSI and rides awesome at pretty much any height.