Can zero knock retard ever be achieved? I know everyone says zero is the goal but I have a stock pulley with all supporting mods, 3" downpipe, front and rear logs, stat, plugs, zzp tune and I still get upwards of 7 degrees. I just acquired hptuners so I want to attempt to tweak this myself, is there something I'm missing? Is 7 normal? Does anyone have an HP file they can upload that I can compare to?