Keep the AFC at 0 and let the computer do its job. Basically all the AFC is doing is lying to the computer about how much air flow is entering the engine. Hense the name... Air Flow Converter. The ECUs fuel maps are already set for 450's, so by adding on the AFC you are just lowering the amount of air you can flow because the AFC is telling the ECU that you are flowing more air than you really are to give it more fuel making it a lot easier for your fuel maps to max out and for you to get fuel cut. By subtracting on the AFC you start to run lean. Probably not at what you are running but I wouldnt be pushy with much over 10psi on the 50 trim.
Get injectors ASAP! Also throw in a Datalogger to your "Things to get" list.
