A Buddy of mine tuned my 12 Evo X GSR last week and can definitely feel a huge difference. Only problem we were having was that while making some pulls, the Throttle sensor was originally showing it was only opening at 70. I read in another post that for the formula the max it will open is at 87 but one can adjust formula to show max at 100. After we were done with everything we were only able to get the Throttle sensor to open at 80 and could not get it to go any higher. With the mods, the car definitely came alive after it was tuned. Definitely impressed with the results now just have to get on a dyno for some numbers which should be around the 340awhp mark from what I'm seeing.

Does anyone have any ideas one why this may be happening?

Mods:
Injen Intake
Injen UICP
Tomei Expreme Ti Catback
Tomei Widemouth Downpipe
Speed Circuit Test Pipe
Grimmspeed 3 port (Tuned at 22psi)
Stock Turbo
Stock FMIC