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good choice for a diesel conversion? what do you think

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Old 03-24-2014, 09:59 PM
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Default good choice for a diesel conversion? what do you think

http://www.offshoreonly.com/classifi...o55827-en.html

i like the chain boxes so the drives are close together in a side by side set up.

the boat looks really crusty tho, like it hasn't been maintained worth a crap... and its been fro sale for a while
the dash isnt a turn of for me cuz i would end up redoing the dash with all the gauge for the diesels... what do you guys think?

anyone know the history of this boat??? thx, rm

after hearing you need to go through a pair of 6s so often, im a big arneson fan now. lol

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Old 03-25-2014, 03:08 AM
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Would like to hear which diesels and gearboxes you would go for?
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Old 03-25-2014, 06:07 AM
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To make it run right you will need some 550 hp cummins or 600 hp FPT, plus ZF 2-speed gearboxes, each engine and trans will be worth more than that boat. Some 480 Yanmars might work also.
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Old 03-25-2014, 07:09 AM
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A pair of MDS VGT500'S (marinized Duramax) would be a bolt in. they can be installed on the same centerlines as the Mercs.

http://www.performancediesel.com/wp-...GT500-MACC.pdf

If you want to learn more, they are distributed through Performance Diesel in Texas. Fantastic company to deal with, fantastic powerplant. http://www.performancediesel.com/ -Ask for Troy, tell him Kurt from Maine sent you.

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Old 03-25-2014, 07:17 AM
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Just throw 20 of those SA sloots on the back. You'd have more than enough ass in the water to get you anywhere you want to go
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Old 03-25-2014, 06:46 PM
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Get a pair of used Cummins 300B's or higher if you want to put that much money in an old Wellcraft?

You can play with the Arenson gears and it will run 60mph or so, cruise all day 50mph and burn almost no fuel. With a little pump recal you can make 330-350 hp and be fine. Get a pair of modified 72C transmissions (the boat has them I'm sure already) , go to someone like OSCO http://www.oscomotors.com/catalog/catalog60.asp and get yourself SAE to 72C adapter plates, B's will only have SAE 2 or SAE 3 housings. Then get drive adapters, solid hubs if you can if not these will hold them http://www.oscomotors.com/catalog/catalog61.asp you may have to re-drill some flywheel holes but put the flywheel on a rotary table and you can do it on a drill press if you had to.

What more do you need, it's an old Wellcraft not an LS, to put big power in it is a waste, it won't go that much faster, 500+ HP engines and they might not even fit!

If you could go for it, this is the one time I would try those Duramax referenced above, the only problem I see is where you are try and get someone to work on them or get parts. Cummins B are all over Central & South America in some form or brand.

If this was me, what I described is exactly what I would do

I think it was said best earlier - do you want to put that kind of money into an old boat?
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Old 03-26-2014, 11:18 AM
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Originally Posted by Biggus
A pair of MDS VGT500'S (marinized Duramax) would be a bolt in. they can be installed on the same centerlines as the Mercs.

http://www.performancediesel.com/wp-...GT500-MACC.pdf

If you want to learn more, they are distributed through Performance Diesel in Texas. Fantastic company to deal with, fantastic powerplant. http://www.performancediesel.com/ -Ask for Troy, tell him Kurt from Maine sent you.
what do they get for those engines, they dont have prices on their site? what transmission would you run with them? thx, rm
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Old 03-26-2014, 11:22 AM
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Originally Posted by HabanaJoe
Get a pair of used Cummins 300B's or higher if you want to put that much money in an old Wellcraft?

You can play with the Arenson gears and it will run 60mph or so, cruise all day 50mph and burn almost no fuel. With a little pump recal you can make 330-350 hp and be fine. Get a pair of modified 72C transmissions (the boat has them I'm sure already) , go to someone like OSCO http://www.oscomotors.com/catalog/catalog60.asp and get yourself SAE to 72C adapter plates, B's will only have SAE 2 or SAE 3 housings. Then get drive adapters, solid hubs if you can if not these will hold them http://www.oscomotors.com/catalog/catalog61.asp you may have to re-drill some flywheel holes but put the flywheel on a rotary table and you can do it on a drill press if you had to.

What more do you need, it's an old Wellcraft not an LS, to put big power in it is a waste, it won't go that much faster, 500+ HP engines and they might not even fit!

If you could go for it, this is the one time I would try those Duramax referenced above, the only problem I see is where you are try and get someone to work on them or get parts. Cummins B are all over Central & South America in some form or brand.

If this was me, what I described is exactly what I would do

I think it was said best earlier - do you want to put that kind of money into an old boat?
i want to do it on a reasonable budget to move people to and from my island hotel project. after seeing 6s need to be rebuilt so often, i only want a boat with arenesons. i will put 75+ hours a month on it, maybe even a 100 hours

i have never seen an apache 41 with arnesons... if i can find a deal on a used set of arnesons, then i would look at doing an apache 41...
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Old 03-26-2014, 11:28 AM
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Originally Posted by ratman
what do they get for those engines, they dont have prices on their site? what transmission would you run with them? thx, rm
We've done many of these MDS Duramax packages all over the globe. They have been very reliable. We've been using upgraded Velvet Drive 72's on repowers and the new Velvet Drive L-H on new builds. Call for pricing
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