Quote:
Originally Posted by EricSilver
While revving the engine in idle this morning, it became rough just after 4000rpm.
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I just noticed this. A little OT, but you should know that revving an unsprung engine to high RPMs can cause damage. RPMs of 4K, 5K, 6K, etc. should only be reached while the engine is under load. Again, sorry if off-topic.