Quote:
Originally Posted by Flieger
There isn't as much possible error in boxer motor cranks. You don't even need counterweights, as witnessed by the 911T. So you are only talking about a few grams rather than needing to re-grind counterweights after installing lighter rods and pistons as you would need to do on an inline engine, assuming it was balanced at the factory.
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The boxer crank has inherently good first and second order harmonics characteristics. That does not mean you don't need to dynamically balance it.
On the other hand, if a few grams difference from one journal to another, spinning at 6500 rpm don't bother you, then that's entirely your dollar.
All I say is, if i don't know the history of the crank, I will ask to have it balanced, and preferably, I will watch and ask questions. Just my opinion and my dollar.