I wanted to put one or two in a boat also.
The Ford Super Duty 534 twin-turbo V-8 engines in our Hatteras are another good example of the very high output you can get by supercharging a heavy-duty engine that was originally naturally aspirated. These were about 270HP and 450 ft-lbs in stock form....450HP and 670 Ft-lbs when trimmed like the ones we have....below..