Will depend on the block. At the power level your looking at it should be fine with most blocks at .060", but personally I would never ream one out that far just because, if I could use a smaller overbore then I would.
30 replies to this topic
#27
warrenm
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Posted 17 June 2015 - 12:01 AM
Use the smallest oversize that you can get away with, should something happen later on, you can bore another size up. If you go straight to .060"(like most engine reco company's did) & damage the bore at some stage, you have nothing left to bore.
#28
N/A-PWR
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CABIN ENGINE CONTROLS GALORE
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Posted 17 June 2015 - 12:09 AM
seen any .080" pistons around Warren?
Was the case in the 80's.
But, youse are right,
old slugs are too heavy,
unless there are the US equivalent's. 
#29
warrenm
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Posted 17 June 2015 - 06:45 AM
They're probably still available, but they don't leave much wall thickness on a 35/40 year old block. Unless you go to the trouble & expense of sleeving a block, more than .060" is junk.
#30
_ljxu1torana_
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Posted 17 June 2015 - 04:19 PM
seen any .080" pistons around Warren?
Was the case in the 80's.
But, youse are right,
old slugs are too heavy,
unless there are the US equivalent's.
dave 80 over pistons were available a few years ago with std written on top of the piston but have to put in a order for them.
#31
Dave6179
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Posted 20 June 2015 - 07:59 AM
If it doesn't need that much overbore don't bother. You won't feel the difference whether it's .020 or .060... and also relies on piston availability/prices. I was going to fit new slugs to a freshly honed bore, the machinist said the bores were too far different so I went to a .040 bore, with Mahle pistons to suit.
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