I am still having a problem with porpising. I have a Cole 20' SS. 454 stock, 12Jg, place diverter , fresh pump . Weight is about 2400 Lb. Boat is mainly a family boat. In order to not porpise I must keep my diverter at a 4:00 position. If I move it to a 3:00 postion it will porpise. I did put a ski type loader on. I did gain 5 mph . My boat does 55 mph. When I am in the 4:00 position it rides great , but I can tell that it is holding the boat back. As I move the diverter to the 3:00 position the boat picks up speed , but also wants to porpise. Giving it a quick bit of gas will help , but it still wants to go back to porpising. I don't have enough Hp to blast thru it. Also I am having problem when I pull my kids on a tube. Even with the diverter all the way down , on plane , the water from my jet seems to want to shoot down into the water and come back up as a small rooster tail ? It sounds weird . I have never had a boat do this. It shoots back up about 12' from the back of the boat. Enough that I can't see the kids. When I turn the boat the small tail goes away. Can anyone help ? I like the boat . I want to get proper set up before I start adding preformance up grades. Where would you start? Thank You.