I've got a jdm B16a with STR fuel rail, adjustable FPR, short ram intake, aebs intake manifold, test pipe with magnaflow catback. Where should my fuel pressure be with these mods? I'm running a Phearable chipped ecu with a pretty stock base map. At low rpm's I get a slight ping. My distributor is right in the middle. Running 40psi fuel right now. Do I need to raise the fuel pressure to eliminate the pinging? Any info appreciated.