If you are having issues with boost dying off up top theoratically u would need to loosen the wg rod (unless its already extremely loose). AKA make it longer. i believe tightening the rod = quicker spooling but possible boost fade up top.
could the rev jumping be your SRM and FI not playing well together? have u tried turning that off? only other thing i could think of would be the tune you are running having something to do with it. dyno time may be your best friend here
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09 370Z ST 6MT//Injen CAI//Greddy CBE//TP//TSW's//Swifts//Stillen lip//Whiteline sways
326whp/268tq
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