13.5 is rather lean in boost. it's not a stock turbo, and i assume youre probably running a soch maf, which contrary to popular belief, has a different transfer function than the actual sr maf. which t28 turbo are you running(s14 t28, s15 t28, s15 t28r, gt28rs)? also what is base fuel pressure set at? I believe stock is 43-45 without vaccum. jump your fuel pump relay and check it. that fpr you have looks rather chincy. I'd investigate it further. i still think the lower injector bosses you have could be leaking (ive seen it happen on every sr we've tuned/worked on without them being welded in). crank fuel pressure up to 48-50psi base and see what afr's are? the emance tune is a decent one. the few cars ive worked with, with the emance mail order tunes have been pretty close, the timing maps are rather conservative though. I would check everything over (boost leaks, FP, etc) and see where you are from there.