Quote Originally Posted by Turn In Concepts View Post
All 06+ 5MT cars are 3.7 FD and quite a bit stronger than the earlier 5MT.
Tony
Indeed. Here is a chart some various transmission options.



If you look at this and use the torque/hp curve from my EZ30R as a reference



Where torque comes on is based a lot in what turbo you are using. If you put a 30R on, you will be at peak torque by 3600 rpm, while with a .82 35R you are look at 4500rpm. It is ideal to have the shift point such that you land close to the beginning of the peak torque area, and can carry that gear as far as possible.

With my EZ30R setup, The PPG gears will work pretty well. The 1st to 2nd is a little bit bigger jump (down to 4150rpm), but manageable. The 2nd, 3rd, and 4th gear shifts are well places to keep things in the torque island.

The 06-07 WRX with the 3.7 FD does give you good range per gear. If you took an 08 5-speed and put the 3.7 ring gear (easy to do for our 818s), you probably have the best setup.

Jeff