I'd prefer not to have a turbo charger on an engine. The extra heat and higher compression shorten the life of the engine, and make it more expensive to fix. Check out the Endurance, the electric pickup truck from Lordstown Motors. The hub motors would be a great way to repower a ski boat. Four of them would easily fit under an existing engine cover. 600 HP with four of them. but two or three of them would do the job.