Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 8500 rpm vs 6500 rpm
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Old 03-05-2007, 12:59 PM
mrl mrl is offline
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8500 rpm vs 6500 rpm

I suppose this may sound like a vague question, but what makes one engine capable of 8500 rpm vs one that is limited to 6500 rpm? Is it strictly a matter of better internal moving parts being used? What about shorter stroke vs longer stroke? Is there a limit for a bore/stroke ratio? The following is fairly obvious: proper carb size and fuel supply, single plane intake, higher flowing heads, high perf valvetrain(proper cam, pushrods, retainers, locks, springs, valves, etc...), forged pistons, great rods. Does it come down to "what is the application, race or cruise" and build accordingly? If both are built properly, will an engine designed and built to peak at a higher rpm make more power than the same engine (type, displacement) which peaks at a lower rpm?
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