B4 you buy an SCT tuner, talk to TurboTom here.
He offers a package deal of SCT Tuner & lifetime custom tuning.
I'd suggest looking at the "tuning" section here for more info. to get "up to speed" on what's involved, including useful Hdwe. for best results (Wideband O2 is VERY helpful, almost required for more than basic mods. You're in this category)
"Rubber Side Down"
Focus Takeover #003 / Tarbo Fan #003