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| − | ==STOP RIGHT HERE, THIS IS INCORRECT==
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| − | What size stroke is in these engines that these figures above are suppose to represent. You can't believe that an engine with a 3.000" stroke is going to have the same RPM range as an engine with a 4.500" stroke, using the same duration cam? It won't and all of these generalizations are ridiculous. The duration of a camshaft is determined by the Mean Port Velocity and the Mean Piston Velocity, which is determined by the Stroke and RPM. You're trying to fill the cylinder at a given RPM, and in order to due that you need to control the Mean Port Velocity during the induction process. Controlled Induction! Compression does not have anything to do with determining the correct cam duration for your engine and desired Peak HP RPM?
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| − | ((Mean Piston Velocity FPM / Mean Port Velocity FPM) * PI), and 2 more calculations give you the valve seat duration. You can find it in Controlled Induction.
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| | ==Additional reading/engine theory== | | ==Additional reading/engine theory== |
| | {{Note1}} | | {{Note1}} |
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