If you go to bigger injectors, you only really need one of the following: MAF, Apexi, chip. More is better, but just having the S-AFC is enough to adjust properly. Having a MAF (or chip) for the injectors would certainly make it easier (baseline is already taken care of) but it's nothing the S-AFC can't handle by itself.
If you don't have any of those three, you will set a perma-CEL and run too rich when you go bigger.
