The V 20 hits 50mph tops, but any faster ?

[RidgeRunner]

First trip to the water was a success. I had a few problems. Trim pump won't trim the motor under full throttle acceleration. Wires look suspect to me. But it is probably a check valve issue in the pump. Second problem was the paint job on the gearcase. All the paint was stripped off while underway. No signs of primer.
250 EFI motor ran great. The additional weight did not go without notice. I prefer the lighter 200 and the way the boat would sit without the extra weight. The boat will porpoise now with higher trim angles but seems to go away with a little tuck, used the trim tabs for the first time.
The boat planes at 3000 rpm without trim tabs and runs 24 mph, 34mph @ 4000 rpm , 44 mph @ 5000 rpm and I saw a brief max speed of 54.1 mph @ 6100 rpm. Only four hours run time with new rings I didn't want to push my luck.
Boat handled great, no noticable difference on plane and no problems with the extra speed. Obviously not enough prop but I have a good feel for what it is capable of now. 60mph ain't gonna happen.
I was turning a 14.25" x 19 pitch Quicksilver prop.
The bow isn't flying. I am going to try a prop with more cup and rake. Any suggestions?