2 X 496 (420hp) and 63knots thats was last summer. Today 2 x 496 with superchargers and around 500-550hp each.
The problem is that the boat have problem to come on plane. After ventilation in the beginning the boat will start "spinn" and falling down. Ordinary boats will "spinn" a time and then come in to plane.
Today when you come to plane the boat will make 53 knots at 3500rpm, before 45 knots at the same rpm.
We know that this is a prop problem, i have to check with the owner what props he have today.
Anyone here have simular setup?