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I use the blue lanthanated rods for everything, AC or DC, and they're fine. They don't melt as fast as the green pure ones and they aren't radioactive like the red ones. Your description of welding cast aluminum as like cooking a marshmallow with a propane torch is spot on, though. It just sucks a lot and all you can really do is build it up huge and file it back down and hope you didn't get too much porosity.
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Jan 23, 2021 20:03
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lmao
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Apr 18, 2021 19:14
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Yeah. There are a lot of different parameters that matter for a cylinder bore (diameter, roundness, concentricity, smoothness) but all of those numbers are measured to the ten-thousandth of an inch. Except smoothness, which is measured in millionths of an inch. I'm not sure how critical the bore centerline is in this particular engine, as that depends on the design of the crankshaft and connecting rods and such. But being off by half a millimeter, .020", in any dimension is literally two orders of magnitude worse than you'd expect a good engine shop to be able to hold.
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Apr 18, 2021 22:31
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