24', 454 mag, trim tabs, 22p enertia. Boat planes well and the hole shot is decent however as I hit a top speed run I start porpoising. I still have a click or two left in the throttle but can never go all the way because of the porpoising problem. Best so far is 60 on gps, I think iave a couple more mph's if i can control the porpoising. Someone said I should put spacers in my outdrive but it seems to me that it would make my problem worse. Any help is greatly appreciated.