Quote:
Originally Posted by Re_Invention
Yeah, that's absolutely it.
I briefly looked into a final drive gear for S2K as-is. Wasn't convinced enough to go with a 4.77 final drive, 4.56 sounded like the right bump up but I decided to wait and leave the s/c door open if I ever grew a pair to go down that route then reassess what needs addressing. So many parts, so little money. Do you have a preference for a particular final drive?
Reading back what I posted... I want to emphasis that as you compare the Twins to the higher-weight class cars they punch at, you get into quality-reverberation. What I mean by that; at high(er) metrics and mechanical demands - those small(er) tangibles and intangibles begin to compound, stripping a car to its base where quality matters considerably. That the twins punch above their weight is the best compliment I can think of. That they need greater compensation than the higher weight class to travel similar speeds is logical and not a slight to their achievement whatsoever. Again, for me its a feeling and I don't expect to feel as good because it's saving serious $ getting similar results, either price or details suffer. One thing I've learned modding the S2000 - keeping quality up is a direct function of money. Creating automotive harmony is pretty damn extensive and exponentially expensive.
Nothing but praise for both cars! 
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The 4.56/4.57 take 1st-4th to exactly AP2 gearing. Your 5th and 6th will be shorter than a AP2, but relative gearing is still taller. It's the best of both worlds, IMO.
Unless you have a specific circuit you want to run the car on, I don't really have a specific preference. a 4.3 takes your relative gearing to be identical to the FRS/BRZ for 1st-5th.
Funny how those numbers work out, isn't it?
With FI, you may find yourself wanting a 3.9 or 3.7 FD.