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I have a question regarding crankshaft terminology and I'd
like to hear your opinions. As we all know, originally there were cast & forged crankshafts available from the factory. Cast cranks are obviously just that - cast. Forged crankshafts start life as a rough casting, then go through the forging process to compress the steel and make it inherently stronger. So, is it correct to refer to forged crankshafts as a casting ( eg. this crankshafts casting number is '7115 ), or should that '7115 be the forging number? For those that know, are the part numbers on the forged cranks ( eg. 6223, or 7115, or 7118 ) originally cast in to the rough castings, or added during the forging process? I often hear people refer to casting numbers when they refer to forged crankshafts. I just want to know if this is correct. Obviously, neither of these variants take into account billet crankshafts. But they are another topic altogether. Steve
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