I am a bit confused over the gearing too. I fit the most expensive gear box to my Evo VIII, but it claimed to drop my acceleration loads, anyway I proceeded hehe.
With a little bit of tweaking, the benchmark now shows it quicker 0-60 and 0-100 than the previous box, although the stats still claim the previous one was quicker :S
Anyway I have just made my gears quite long, like 0-45, 45-75, 75-110, something like that anyway, and although doing this makes my 0-60 worse than when it was just snapping through the first 4 gears, it now performs great on the track.
I think a bit thing is making sure 1st and 2nd are long enough so you don't sit there bouncing off the limiter
.....as for the rest of the tuning, it's hard work to get anywhere at the moment
