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      12-15-2012, 07:35 AM   #15
jhbodle
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Drives: F90 M5
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Quote:
Originally Posted by ovekvam View Post
Why is that bad for the engine?
Not sure myself, but ask the question on any car forum and you'll get the same answer. My best guess is that when revving hard in neutral, all that kinetic energy that is normally spent driving the wheels has to be soaked up by the engine.

Imagine throwing punches hard at a punching bag then doing the same without the punching bag there. It's gonna mash your arm.
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