24' with twin small blocks
#15
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Joined: Feb 2011
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What kind of speed are you guys seeing with your 265's with the twin 350 mag's? I have always liked the idea of a twin small block setup on a boat. Gies you a little more room to work between the engines, and parts are cheaper than for twin big blocks. A pair of good running 383's with Bravos to back them up would be golden, IMO.
When I was boat shopping 12 or so years ago, I am pretty sure that I saw someone in the northeast selling an '87 Force 235 with twin small blocks. I wonder if it would have the same handling issues as the 240?
When I was boat shopping 12 or so years ago, I am pretty sure that I saw someone in the northeast selling an '87 Force 235 with twin small blocks. I wonder if it would have the same handling issues as the 240?
#16
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Joined: Dec 2005
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From: Fairborn, Ohio
When the boat was new, it came with 23 degree props.
I got it with a set of 20 degrees. I've kept it this way because we do a lot of tubing.
Tha being said, I've turned these engines at 5400 rpm on occasion, hitting 70 on the wishometer. Running next to a buddy's boat, his speedo had us at 63.
Last year, with 4 adults, 4 kids, full tank, the wife's cell phone gps had us at 56.
The engines are stamped max wot rpm as 4200-4600. I would like to turn them at about 4800 if I ever set it up for speed, so it's a guess what the boat would do with the 23s.
Mid - upper 60's?
I might have to see if I could borrow a couple of right hand 23s and find out once and for all.
#19
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For the record, Ken, the prop pitch is measured in inches, not degrees. If it had theoretically zero slip, a 23" prop would propel the boat forward 23 inches with each rotation. Doesn't really have anything to do with the angle of the blades. To further confuse thing, some props have more "cup" in the blades, which actually contributes to bow lift and makes them act somewhat like a bigger prop.
#20
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Joined: Dec 2005
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From: Fairborn, Ohio
For the record, Ken, the prop pitch is measured in inches, not degrees. If it had theoretically zero slip, a 23" prop would propel the boat forward 23 inches with each rotation. Doesn't really have anything to do with the angle of the blades. To further confuse thing, some props have more "cup" in the blades, which actually contributes to bow lift and makes them act somewhat like a bigger prop.



