Joecool12
New Member
- Sep 10, 2017
- 12
- Boat Info
- 1986 410ac
1983 340 sedan bridge
1987 Sea Ray sorento
- Engines
- Twin 340 mercruiser
I purchased a used 410AC a few years ago. i moved up from a 34 foot fly-bridge model. I had repowered my old Sea Ray with modified 454 pushing around 420 to 440 HP each. The boat did 36 to 38 knots at 5500rpm. 1.5-1 reduction (i think). So i want to Put something like that or more in my new 410AC. I know I wont get the same performance I got out of the old boat but this new boat only does 19k at wide open throttle. Reduction is 2.91-1 and the hull dead rise is almost the same as old boat. Anyone know where I can get answers on why the 3 to 1 reduction, and if this hull will do 30k also what is the point of diminishing returns with HP
