I know that this is an old post but i thought i would still add my bit to prove to you guys that safc can support power. i have an r33 with 80000kms, standard ecu, standard coils, t66 turbo, 3.5" exhaust, standard injectors, safc 1, standard afm and a 2:1 fpr. i made 345rwhp on 16psi and 408rwhp on 20psi. air fuels at 11.3 and base timing at 15 deg. ignition timing going to 16deg. ( all safe) car has been going for 6 months now. so if someone wants to muck around with safc's i say go for it. however i only went this way to see what power i could get with standard ecu. i am now going in the direction of ditching afm and running a microtech or autronic in search for more power. anyway thats all i wanted to say. hope it helps someone.