its all about the math when file fitting rings you must allow clearance in tight part of the cylinder wall . this is so that if ring heats up and expands it does not stick in the bore . minimum clearance is about.0045" per inch of bore or about .020 on a 4" bore . now if the cylinders have .010 taper to them your ring end gap will be about .050" at the top of the bore where the most leakage will occur if the bore is wore .015" the ring gap will be about .070" .kinda hard to keep the air on the top side of the piston .
If one uses gapless or two rings instead of one you might get by longer but that ring is going to act like a piece of wire that got bent one too many times eventually.Paul
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Today's Featured Article - A Brief History of Tractors in Australia - by Bob Kavanagh. After Captain Cook's exploration of the east coast in 1770 the British Government decided to establish a penal colony in Australia. The first fleet arrived in 1788 and consisted mainly of convicts who were poorly equipped and new little of farming techniques. The colony remained far from self-supporting and it was not until the early 1800's that things started to improve. Free settlers started to arrive, they followed the explorers across the mountains and where land was suitable set up farms. T
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