Ok, SR20's have high impedance injectors. A high impedance injector driver inside a ecu will not not last long driving low impedance injectors,(MSD 96lb-hr, 2ohm).Since the Power FC is a plug and play, it has a high impedance injector driver. I've heard that you can wire in a resistor of some sort to run low impedance injectors, but I would personally just buy a set of larger high impedance injectors. Also, since the Power FC is a plug and play, you will need to retain the maf.
If you want to be a baller and get every last hp, MoTec M400.
http://www.motec.com.au/m400/m400overview/