have a 16ft jet with a berkelley 12jc AA. Pump was just rebuild. Motor is a 468 stock with hyper 10 to 1 pistons, 540 max lift cam with a lobe center of 108. dual plane intake with a holly 750 dual feed vac sec. took it out for the first time and it is only turning 4600 RPM's. Is there anything worng or not. How can i get the boat to turn more RPM's.