a few things out of my mind

isnt the difference of AP1/AP2 gearing mainly (1st~4th) and only sencodary reduction 29/25 vs 29/24?

when you use 4.56*(29/25) vs 4.1*(29/24), it would be 5.2896 vs 4.9542

or are you trying to compare 2 engines at a point where both fuel cuts at same speed kind of gearing?

to truly compare which engine has more advantage, i would suggest using same secondary reduction n final drive (in both stock and tuned fuel cut)


btw J's 70RR fits 06+? i thought 06+ would hit exhaust tunnel?