I have my 22C running pretty fast now, just nudging 90. The boat has a Merc Sportmaster XR drive, an Imco 2" shorty, 29p Max5.
with the 5-blade Max5 prop it comes up on plane easily and the higher I trim it up, the faster it goes. It can get a little squirrely sometimes going for those last few mph though and I was wondering if some K-Planes might add stability at speed, or would they just create more drag and slow it down. It has the small Bennet trim tabs on it now, and I frankly never really need or use them.