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Tractor Pulling Discussion Forum

using no sleeves

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supermpullr

11-28-2005 18:05:53




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what bore size of pistsons would a super m block with no sleeves be?how long would a enngine last with no sleeves? would it overheat bad?and does it ruin the block to where you can never rebuild it again?what kind of rings do you use?




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b barenie

11-30-2005 17:14:26




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 Re: using no sleeves in reply to supermpullr, 11-28-2005 18:05:53  
got e-mail give me a day to reply !



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B barenie

11-29-2005 15:13:01




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 Re: using no sleeves in reply to supermpullr, 11-28-2005 18:05:53  
If your tractor pulling, I would leave the sleeves out. Bore with sleeve out in a 264 block are going to be rite at 4.25, you can bore to 4.31, 4.34 or all the way out to 4.375.
4.375 is a push, you will have to have the block tested as flogger said, hard block or an epoxy fill would be much advised. If you went to a 4.34 bore, there would still be room to freshen it up 10 years from now ! There are individuals out there who can make the top ring for you, or a qualified machine shop can fill that recess, during the boring operation.
I know of an individual who is running this type of set up in an (m) motor, no air cleaner, and he has pulled it over three years, tractor was changed over long before that !

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Flogger

11-29-2005 14:23:13




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 Re: using no sleeves in reply to supermpullr, 11-28-2005 18:05:53  
264/281 blocks should go 4.375 safely. You'd have to pull it forever before you ever had to worry about reboring it. You should have it sonic tested to make sure though. Overheating wouldn't be a problem if the rest of the cooling system is good... Might as well add an inch or so to the crank while you're in there....



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ChadS

11-30-2005 10:30:04




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 Re: using no sleeves in reply to Flogger, 11-29-2005 14:23:13  
I agree, you would have to abuse it pretty bad to wear it out anytime soon. Aint much different than a car engine with no sleeves, if you take care of it, would run for years and years, and oh yes, you could add an inch with the right pistons. Chad



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supermpullr

11-30-2005 13:40:09




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 Re: using no sleeves in reply to ChadS, 11-30-2005 10:30:04  
how does it work using no sleeves? how do the rings stay compressed? and what keeps the pistons from going everwhere since they have no sleeve to keep them in track. how much HP can you get from doing this if you dont hhve the block bored?



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Flogger

11-30-2005 14:11:44




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 Re: using no sleeves in reply to supermpullr, 11-30-2005 13:40:09  
The M-450 blocks use a dry sleeve from the factory. When you remove the sleeve you still have a cyl bore all the way down. An M block is around 4.125 without the sleeve, and a SM-450 block will be around 4.25. Either block should stand a 0.125 overbore, but again sonic testing is a good idea.



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