Quote:
Originally Posted by DieselEater
Gearing will get you there also, but may slow you down at the same time...LOL
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Gearing will not "change" operating RPM of a motor.
Operating RPM is typically a function of cam timing. There are other things that can hold RPM back like intake manifolds and headers that are not appropriate for a given combo. But in all reality it is a combo, and needs to be thought of that way.
Generally speaking and cam with a later intake valve closing point and more overlap will spin more rpm.
To Marv's point, piston speed can wear on bottom end parts very quickly. The heavier the components the lower you want to keep piston speed.