Hurley, thought I'd check in. My afc is still gutted. I noticed a kink in the boost reference line. I fixed that and removed the plate. The pre boost screw was all the way out, so I turned it in just a bit as well. I removed the isolator from my fuel pressure gauge set up, and I now show a constant 38-40 psi. In fourth gear from a roll I can now hit ~50 pounds of boost at 2800 rpm, 13-1400 degree egt, and man it seems as fast going from 60-90 mph as my old 66mm/650cc pump/5x.020's set up did. I'm pretty impressed. I'm used to quite a bit of lag, so this smaller charger's response already has me impressed. I don't even think I'd like it much "snappier." Just thought I'd respond with more good 63mm charger results. Once again, it is a BW, Manning Motorsports built, 63/68/.91 T4 HX 40 flange, billet 10 blade compressor wheel, 6 pad thrust. Thanks for your help and patience with me