AFM in STU

[Greg Amy]

Seems to me that the formula classes car by displacement to weight, which is an assumed HP basis.

Actually, while you're inferentially correct ("displacement to weight, with assumed HP") I think you're off the mark in that while you are assuming it's based off of stock output/displacement, the category is actually assuming relatively-equal modified (resulting) output/displacement. Removing non-standard restrictions such as varying AFMs would tend to equalize that.

Get past that IT mindset and it "kinda" makes more sense...ain't sayin' you'll agree, just sayin'... - GA

On edit: Actually, in re-reading your response, I think you're saying the same thing. Were one to take that concept further, then the category could remove other reasonable non-standard restrictions, such as intake manifolds and equalizing throttle bodies...in the end, you'll never make different engines with equal output no matter how hard you try, but the variables are minimized.