well i dont know, there are other areas that have high FP and have a bit of a spike, but just like my logs, FP fluctuates, on my bench setup I 0,d the FP injector compensation and it clearly stopped at 4000rpm. But now you got me wanting a fast WB like yours.... i know its PLX but what model, or are they all the same? mine is NGK and looks so slow... wonder if its causing tuning problems