copperhead Posted April 17, 2004 Report Share Posted April 17, 2004 So, yesterday at work I was bored, and started thinking of ways to make fun of rotary nazis. I then came up with an idea that actually made some sense to me. Why not put a rotary into a boat? Has it been done before? The upsides that I came up with is: Less weight than a piston motor in the rear. The boat should level out faster, and ride higher in the water. Higher rev's. The boat that I grew up using had one forward gear, and I assume that most are the same. Being able to rev higher = more top end. Power output. The boat my father had was a 140 horse 4 cylinder chevy, and after a tuneup it would do around 50 MPH. An NA rotary could easily do that. Something that I hear is a problem with a rotary that, I think, would be solved in a boat application is cooling. Boat's suck in fresh water to cool the engine, so I would think that the engine would stay at a good temperature. What does anyone else think about this idea? Quote Link to comment Share on other sites More sharing options...
Total Sign Posted April 17, 2004 Report Share Posted April 17, 2004 You need TORQUE in a boat. It has been done, but in small and light weigh boats before, will try to find a like to a place that sells one... 13B supercharged, marinized, I believe 240hp. Quote Link to comment Share on other sites More sharing options...
copperhead Posted April 17, 2004 Author Report Share Posted April 17, 2004 Wouldnt you only need low end torque, to get started? Once your moving, I wouldn't think that it would take very much torque to keep the prop spinning. Quote Link to comment Share on other sites More sharing options...
Total Sign Posted April 17, 2004 Report Share Posted April 17, 2004 Take much torque? Boats are comparable to driving with your foot on the brake. Quote Link to comment Share on other sites More sharing options...
Guest Super J Posted April 17, 2004 Report Share Posted April 17, 2004 Originally posted by HIgh Risk: Take much torque? Boats are comparable to driving with your foot on the brake. Tru story, water gives alot more resistance then air...ever wonder why boats don't have brakes? Quote Link to comment Share on other sites More sharing options...
The Man of Steele Posted April 17, 2004 Report Share Posted April 17, 2004 We had a built 350 in our boat, it hauled ass Inboard > outboard Quote Link to comment Share on other sites More sharing options...
Guest nevarmore Posted April 17, 2004 Report Share Posted April 17, 2004 It has been done. There is a 13B diesel marine engine out there. Its targeted at things like inflatables and semi-rigids IIRC. I'm scrounging for a link now. Quote Link to comment Share on other sites More sharing options...
Guest stevil Posted April 17, 2004 Report Share Posted April 17, 2004 Should be fine if it's NA. But yeah, something with more TQ might be better. Quote Link to comment Share on other sites More sharing options...
Guest nevarmore Posted April 17, 2004 Report Share Posted April 17, 2004 Ok well the link I found via a search for the thread at RX-7 Club came up as a 404. It was from boatingnews.com and a search there turned up jack squat. BUT AutoZone has a listing from a 1976 Mazda Cosmo as having a 13B diesel injected engine. Quote Link to comment Share on other sites More sharing options...
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