I am having issues getting up to surfing speed. 2019 Supra SL 450 with ACME 15x11, 2937 prop running at 5000 ft elevation. Full stock ballast with 500 lbs in each rear locker, 200 lbs of lead mid ship with 6 adults in the boat. zero off set at 11.3 mph and can't get to speed. Funny thing is that it won't go over 3600 rpms and I know the boat can rev higher than that. It doesn't matter if I have autowake on or off. Any suggestions?