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Old 10-03-2010, 12:48 AM
SharkFM SharkFM is offline
 
Join Date: Oct 2010
Rep: 10 Posts: 4
Location: Canada
GT40 Ski Nautique with Carbon Fiber Mods

I have a 97 Ski Nautique with the 310 HP GT40. I stripped it and replaced the platform, floor panel(s), motor box and seats with Carbon fiber, reducing weight to about 2000 lbs (stock is 2400 lbs). The boat is smokin' fast.

Got a new CNC ACME 422 4 blade on it, and for 34 MPH I rev at 3330 rpm.
WOT i rev at 5100 rpm speed over 76 km/h ~47 mph.

422 12.50 15.50 .105 cup 4 1" RH

Should I have gone with this one???
668 12.50 15.50 .150 cup 4 1" RH

I think i need to see the torque curve of the motor.
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  #2  
Old 10-03-2010, 07:30 AM
powerabout powerabout is offline
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Join Date: Nov 2007
Rep: 484 Posts: 1,431
Location: Melbourne/Singapore/Italy
you want to make a mid mount ski boat go fast???
take the engine out and put it into something else
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Boat builders are not necessarily Boat designers who are not necessarily Engineers who are not builders who are not designers.....
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  #3  
Old 10-03-2010, 09:39 AM
SharkFM SharkFM is offline
 
Join Date: Oct 2010
Rep: 10 Posts: 4
Location: Canada
Reduce the wake for slalom and increase efficiency
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