Also have the automatic with the Westers tune, huge diference in performance after the tune, much quicker response but no where near the improvement on the manual. This is from 6 of us, two autos and 4 manuals all with same westers tune dynoing our cars on the same day with the same dyno. About 40 to 50 hp diference to the rear wheels.
I wrote to lyndon wester and he is aware of the situation and will be working on it. Problem he says is with the torque converter.
The tune is still worth it as the improvement is dramatic but I hate that the manuals with the tune can kick my butt.
Will be going to the track for 1/4 mile test against manual with same tune and same other mods. Stay tuned for the results.
Chuck