Well, since I want a tranny which is giving me more top speed, but also a usable short ratio for AutoX and a decent ratio for DRAG racing I chosed this one:

modified jdm ITR 98+ spec tranny:

1st: 3.23
2nd: 2.105
3rd: 1.458
4th: 1.107
5th: 0.787
fd: 4.400

I chosed the shorter 4th gear over my 1.034, cause with the 4th gear I will drive thru the finish line on 1/4 mile events.

I feel not realy a difference on the large 5th now, it pulls very hard up to 260kmh (not tested top speed at this time, should be close to 300kmh) equal to the 4.785fd. I need 1 liter/100km less on highway driving, a benefit from the longer 5th.

Hope to get better 1/4 mile numbers with that gear ratio, since launching should be easier and traction a bit better

 

similar to my tranny.

gsr tranny with jdm itr 4.78 FD and a quaife. The higher FD will help to keep my turbo spooled. 3rd and 4th gear are especially strong.