Quote:
Originally Posted by bradleyland
This presumes that exceeding a specific RPM threshold will damage the engine somehow. The operating constraints of a high-output engine differ from a standard engine. As you begin to push the envelope, you edge closer to the limits of the materials. This requires special consideration. It's entirely possible that it's perfectly safe to rev the N55 in the M235i to redline a shortly after starting it up.
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Obviously no one will convince anyone of anything here. I recommend you write to BMW engineering and ask them. Don't believe us.