safc 2 only controls the air flow and throttle points & reads teh sensors like Knock,correction etc etc.
if you alter the air flow the stock ECU has to try and adjust the timing of the ignition & fueling, which its just not upto the job.
it will only solve half the problems as for now your skyline will be running rich on fuel, and you wont be getting a very good MPG even with a bigger fuel pump and FPR installed the ECU will still tryand fight it and correct it.
your coils will be on there way out (due to having to try and give more power to the plugs due to more cold air coming in) its more the fact you need a proper Remap!
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