Might depend on how fast you want to go and how heavy you load the boat. Going 20-21 knots, mine will carry a very heavy load with the vacuum down around 8, as low as I want to go. Lighten up and it runs over 26 with the same vac. If you want to run faster, a big block might be a reasonable idea, lot less load on the engine, but a lot more fuel. I'm not sure how the higher hp, more modern fuel injection 5.7s run. On horse power, they look like a better deal, 280 or so,but I've not seen what they look like on the vacuum guage. Torque is the real issue.
Definitely a duoprop for this hull. That is by far the best way to apply torque to the water.
Connor
Last edited by cdavisdb; 07-15-2013 at 12:46 PM.
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