What's the limit on boring a McCulloch 101?

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Danny Morris
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What's the limit on boring a McCulloch 101?

Post by Danny Morris » Tue Jul 20, 2010 11:50 pm

How much past .030 can you bore a 101 cylinder before the block is no good? Has anyone ever tried to sleeve one?

Thanks...
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Scott Kneisel
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Re: What's the limit on boring a McCulloch 101?

Post by Scott Kneisel » Wed Jul 21, 2010 4:23 pm

I have heard of guys boring 0.050 over but haven't done it myself.

Anybody else have experience with bigger than the usual 0.030" over??
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Re: What's the limit on boring a McCulloch 101?

Post by mcbob » Wed Jul 21, 2010 5:52 pm

Since i seem to get the badly worn barrels i have collected quite a few .060 pistons ..... McBob
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Rick Chapman
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Re: What's the limit on boring a McCulloch 101?

Post by Rick Chapman » Wed Jul 21, 2010 9:26 pm

What is the largest 101AA piston the Terry Ives carries??
We tried to sleeve a 91 series engine years ago.
We found that there is not enough aluminum casting to support the new sleeve.
It would leak and the engine would suck air, it would distort the casting and because there was not enough casting it would not hold the sleeve.
Didn't Wiseco use to have a +.080 over piston back in the day??
Rick
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Rob Voska
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Re: What's the limit on boring a McCulloch 101?

Post by Rob Voska » Wed Jul 21, 2010 10:40 pm

Depends on the thickness of the liner that was factory installed & how straight it was cast into the cylinder. Replacement sleeves don't transfre heat like a cast in cylinder. I have a .100 over piston from Wiseco.
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Danny Morris
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Re: What's the limit on boring a McCulloch 101?

Post by Danny Morris » Wed Jul 21, 2010 11:33 pm

Thanks everyone..that really helps me determine a value on a 101 that's .030 over. It sounds like it should have enough life left in it, especially for just a few vintage events per year.
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Jacob Jay
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Re: What's the limit on boring a McCulloch 101?

Post by Jacob Jay » Fri Jul 23, 2010 2:03 am

Years ago I had a dykes-ring ART 101 piston that was .095" over. I've only seen one other like it and both went to the same guy who built a matching pair from two extremely worn blocks he had in his collection for years.
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