Sound advice, I will go that route. Thanks again!
That’s the plan for next year. Motors come out going Vortec with Seara iron heads Vortec intake holly sniper fuel injection. Lunati cam to finish it off. She is a rare boat as it spent most of its life in a heated shop Shrink wrapped. Stringers are mint in it. I’ve gotten many compliments on how good of shape it’s in. Everything in it works like it’s almost brand new. That’s why I’ll justify putting the money in it. Don’t want to make it a race boat just faster at mid throttle for those long trips across Lake Ontario. It doesn’t hurt to be a little more fuel efficient too. Thanks for the advice, I appreciate it
buy the heads from GM and save a whole bunch of money.
Yep, I suspected that... But here's your dilemma. As you increase top end horsepower, you usually trade that off with a loss of low end torque. Without forced induction, that's just a fact of engines. So, because you have more power at the top end, you need to run a taller (more pitch) prop to keep the revs in check. That taller prop puts more load on at all speeds, not just the top end, and because the engine isn't making as much power low down AND you propped it up, the engine will struggle to make enough power to even get you on the plane... Marine engine suppliers spec a particular cam for a very good reason. To get as flat a torque curve as possible, to reduce that 'stuck in a hole' feeling of a high HP engine with a tall prop not making enough power to get off the starting line.... I know of so many guys who tried to do exactly what you're attempting, and not one was happy with the result. Mess with power and torque specs, that Merc engineers spend years perfecting, at your own peril.
