Originally Posted by Masheen

They conveniently only have the Engine HP graph on their website because anyone looking to do this tune as a one stop shop for more power most likely doesn't know the difference between bHP and wHP and Torque. AMS should show an actual dyno graph and not the figurative numbers that Mitsu says the Evo X is rated or what AMS claims to make over stock.



This is the type of power that the Stx300 makes. My '13 MR dyno'd stock @ 240wHP/ 270wTQ on a dynojet. 283/296 is still an improvement over stock dyno numbers, but no where close to the 379/383 numbers that AMS has on their "Engine Tuning" graph. Even if you take that 379 "Engine Power" and take away 20% to account for power loss through the tranny, you get 75.8(Driver train loss). 379(bHP)-75.8(DTL)=303.2wHP is what you should stand to make This package for $925 gets you a Cobb AP v3 and a custom calibrated tune (by AMS). The Cobb AP v3 costs $500 from Cobb's website that leaves the tune to be $425. A reasonable amount for a tune, the question is how reliable is it.

I assume that AMS has perfected this tune for stock Evo X's. This tune is meant to be done to a stock car, so having any aftermarket parts may corrupt their flash. Now, we know that all Evo X's are not created equal, from the get, right out the factory, two brand new same year makes put down different numbers. Having a tuner manually take the time to match their map to your car's unique ECU imo is better than a one and done flash from AMS.

That being said, AMS is a great company and I would go to Chicago to be tuned by them in person, but the Stx300 is far from an E-Tune, you don't have someone like Baka sending you revisions of maps and taking the time to fine tune and tweak it to fit your car.