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Old 02-04-2003, 10:43 PM
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Post Blown Chevy 350

I'm in the process of building a blown 350. I have a friend who has a 4 bolt main block that he wants to give me for my project. The only thing that concerns me is that one of the cylinders has
a sleeve installed in it. I'm not sure if it would
be a good idea to use this block or not. One of my main concerns is that there might be a temperature difference in that cylinder with the sleeve that could create a problem. Anyone got any thoughts about this?

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Old 02-05-2003, 05:25 AM
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I have seen 4bolts blocks in our area for 100-150.00. I think I would not take the chance!
:Slanty
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Old 02-05-2003, 05:30 AM
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I have some re-sleeved cylinders on my 2 stroke motor bikes, but we are only talking 60hp (per cylinder) and 8000 rpms. Still works fine in that situation
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Old 02-05-2003, 12:31 PM
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As long as you know who the machinist is and how his work is your probably OK.I have seen plenty of motors that have been sleeved running 450hp and never have a problem.But it all depends on how the guy set it up and how his craftmanship is.
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Old 02-05-2003, 01:42 PM
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sleeves are no big thing...relax..look at all the aluminum blocks, they have every cylinder sleeved.
Its a running joke with a buddy of mine..he has had to sleeve (over time) three cylinders in his 327(he really...I mean really loves that block)lol
grandprix has a point about the craftsmanship thing.
What I dont get, is why are you saving a few buck getting a block that you are not comfortable with?
as for the temp thing..the sleeve is made of the same material as the block...so there won't be a problem there...have fun!
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Old 02-05-2003, 01:43 PM
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If you are not sure about that block you need to take it to a good machine shop and get it checked! Sometimes a sleeved block is ok but you really need to be sure.You dont want to go to all that expense and hassle of building and installing a new engine only to wind right back where you started!
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Old 02-05-2003, 04:17 PM
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Just a thought. Why was it sleeved ? Why is it being given to you? Sleeves are ok If properly installed. Usually stronger than factory castings. By density readings. It should of had .002 to .oo3 crush when installed. Then bored and honed for roundness. With a blower I would want it torque plated. If it threw a rod or a crank; even a piston. Chech the line bore for straitness. Plus scratch your finger on the deck surface if you fill a ridge it needs square decked. Thats just some of the things I would check.
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Old 02-05-2003, 05:20 PM
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FOR THE PEACE OF MIND I THINK I WOULD FIND ANOTHER BLOCK TO KNOW YOU HAVE A SOLID FOUNDATION FOR THE PRESSURES A BLOWER PUTS ON A ENGINE
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Old 02-05-2003, 11:52 PM
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I'd have a good machine shop look at it.One thing on a 350 block look for a block that has the good nickel content.If this sleeved block is not a good nickel block I would think about getting another.
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