The Manta 44 which is quite a bit bigger boat (21 ft. wide) 27,000 lbs with the same engines will top out at 22 knots. But the fuel burn Maine Cat is quoting dosent jive with the numbers we got at the same rpm. The Manta saw 10 gals per hour at 15 knots. Hard to believe the Maine Cat is half that. Engines at a given rpm should burn close to the same despite, displacement and hull fineness difference. We have found the Volvo flow meters to be pretty inaccurate.