bad performance Wellcraft 233
06-02-2011, 03:15 PM
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bad performance Wellcraft 233
Hi,
I have a Wellcraft 233 Eclipse (yes I know not a typically offshorer :-) ) with Merc 502 Efi engine, modified heads, lightning exhaust manifolds, Wiseco 9.5:1 pistons. Bravo drive and Bravo 24p 4 blade prop. I rebuild everything over winter, and hoped to pass the 63mph border but boat still only runs 58mph, it seems not enough for this engine. What is your thought, where could be the problem or is the hull as bad that more speed is not realistic
Thanks for your replies
Daniel
I have a Wellcraft 233 Eclipse (yes I know not a typically offshorer :-) ) with Merc 502 Efi engine, modified heads, lightning exhaust manifolds, Wiseco 9.5:1 pistons. Bravo drive and Bravo 24p 4 blade prop. I rebuild everything over winter, and hoped to pass the 63mph border but boat still only runs 58mph, it seems not enough for this engine. What is your thought, where could be the problem or is the hull as bad that more speed is not realistic
Thanks for your replies
Daniel
06-02-2011, 03:53 PM
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One issue that's probably hurting you is a very conservative drive height. I'm willing to bet that your drive is buried and thus causing lots of drag. Generally speaking, that doesn't hurt until you're running above 70 MPH or so, but with your hull, it could be big.
Another thing I'd check is straightness of the bottom. If you've got any hook - common to recreational boats - that will kill you. Even something as simple as how sharp the lifting strakes, chines and transom are will make a difference.
One thing you've got to keep in mind though is that your hull was designed as a recreational hull. It just wasn't designed to go fast. Attempting to make it go faster than it was designed to go can get really ugly - and really expensive.
Another thing I'd check is straightness of the bottom. If you've got any hook - common to recreational boats - that will kill you. Even something as simple as how sharp the lifting strakes, chines and transom are will make a difference.
One thing you've got to keep in mind though is that your hull was designed as a recreational hull. It just wasn't designed to go fast. Attempting to make it go faster than it was designed to go can get really ugly - and really expensive.
06-03-2011, 11:03 AM
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Boy do I hear you there. We had a guy up here take a upper-twenty foot Baja Islander and go hog wild with a pair of big blocks in it. The thing got totally stupid (even stupider than the driver) at speed and hooked on him one day. A passeger ended up with a compound fracture of one leg and a trip in a USGC helicopter.
06-03-2011, 12:10 PM
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One issue that's probably hurting you is a very conservative drive height. I'm willing to bet that your drive is buried and thus causing lots of drag. Generally speaking, that doesn't hurt until you're running above 70 MPH or so, but with your hull, it could be big.
Another thing I'd check is straightness of the bottom. If you've got any hook - common to recreational boats - that will kill you. Even something as simple as how sharp the lifting strakes, chines and transom are will make a difference.
One thing you've got to keep in mind though is that your hull was designed as a recreational hull. It just wasn't designed to go fast. Attempting to make it go faster than it was designed to go can get really ugly - and really expensive.
Another thing I'd check is straightness of the bottom. If you've got any hook - common to recreational boats - that will kill you. Even something as simple as how sharp the lifting strakes, chines and transom are will make a difference.
One thing you've got to keep in mind though is that your hull was designed as a recreational hull. It just wasn't designed to go fast. Attempting to make it go faster than it was designed to go can get really ugly - and really expensive.
06-03-2011, 01:03 PM
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I think thats the same boat as my buddys,Around 1989 with a 330hp ran best low 50's He had water in the front v birth,I think its filled with spray foam,and soaked up a bunch of water!!! I think you can not get to the area because its covered by wood/glass.He had to cut it open and dug all the foam and soaked wood out.I also heard they have a pretty good hook in the bottom trying to keep the nose down some because of the seat height having to look over the windsheild.
http://www.chooseyouritem.com/boats/...500/294631.jpg
http://www.chooseyouritem.com/boats/...500/294631.jpg
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06-03-2011, 01:24 PM
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How many rpm's are you running?What camshaft are you running?What heads are you using?Did you run it on a dyno?Lots of variables here,not just the hull itself.
Last edited by BURNSMAZZ; 06-03-2011 at 01:35 PM.
