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Originally Posted by DanoFA20
thanks soo much! would 8000 be harmful? or is that still safe id like a tad more rev unless its useless to rev it that high?
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You begin to lose power at around 7K. It really depends on the application and your goal. I wouldn't recommend it because you're not going to increase performance and are only putting additional stress on the engine system.
EDIT - To expand on application, for instance if you're running a more aggressive timing or cam profile, fuel, or port/bore the engine...obviously that changes the powerband and likely power could be gained above 7k rpms, it just really depends.