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Registered
Join Date: Oct 2001
Location: Westford, MA USA
Posts: 8,861
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I've seen that the Byral (an iron sleeve cast into aluminum fins) cylinders can be bored out 1 mm to 85 mm without any issues, especially for street use. More then that and I've been told that the iron liner gets too thin and the cylinders are more likely to distort.
If you can go 1 mm over on Byral cylinders, I can't see why you can't go 1 mm over on cylinders which are completely iron. I'm planning on boring out the iron 2.4TK cylinders that I have to 85 mm.
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John
'69 911E
"It's a poor craftsman who blames their tools" -- Unknown
"Any suspension -- no matter how poorly designed -- can be made to work reasonably well if you just stop it from moving." -- Colin Chapman
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