That all makes sense. I know all of Volvo's and Mercruiser engines have been Vortec since '99 in boats, I guess to take advantage of the increased HP. The one I am using is a Volvo 280 HP 5.7, and came out of a boat we repowered for a customer. I think the cam profile will be ok (it's a roller cam engine) and I hope by adding an aluminum intake it will bump up to maybe 300 HP.

Thanks for the good info.


Don