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Reply to "RPM limiting on a Performance Rebuild..."

intake valve float is not destructive, it is the natural limit of an engine assembled well. Exhaust valve float is TROUBLE.

Lifter collapse is the reason why hydraulic cams are not expected to rev beyond 6500 rpm, and one of the reasons why yours truly prefers to extend the rpm range with lightweight intake valves rather than heavier springs.

(the other reason is heavier springs equate to accelerated wear too)
Last edited by George P
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