Then the 4th throw is at 6 o'clock.opposite number 1 throw. The 3rd throw is directly opposite which puts it at 9 o'clock. With the first crank throw at the twelve o'clock position, the second throw is at 3 o'clock. Looking at both crankshafts from what would be the front of the engine, they both are indexed the same. ![]() It seems logical that manufacturers index their crank throws to create the best balance condition. Now I understand that different manufacturers number their cylinders differently and that affects what the stated firing order will be. I don't have one of those cranks available to compare. Hey, it's all I had handy Anyway the Cad has a 15634278 firing order while the Chevy has a 18736542 firing order. One is a Cadillac and the other is an unmentionable on the Hamb Chevy. I looked at two different crankshafts I have. ![]() Had a thought buzzing around in my head and thought maybe some of you guys might pull some old cranks off the shelf and answer my question.
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