Can anyone chime in and answer a few questions? I've ran the modified map from Perrin and my Fine KNock learning and Feedback Knock is 0 through out the rpm band. The Cyl knock sum Ive been reading is just noise or something because Cyl 2 and 4 are closer to the sensor then you see noise from that and that I shouldn't be worrying about those really. But I'm still only hitting like 16psi when this map is targeting 17.5psi! Should I take some logs again and send them to Perrin asking what the situation can I get another map or my map fixed??