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Classic Goldwing Technical Forums
Engine & Fuel System Modifications
740 carb 24mm bore CFM
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<blockquote data-quote="IBAJIM" data-source="post: 139458" data-attributes="member: 3676"><p>An engine is an air pump, plain & simple. By using the CFM calculator ( or a pencil and/or a calculator ) you can determine the MAXIMUM CFM required of a carb, assuming 100% volumetric efficiency. The MAXIMUM CFM has nothing to do with the cam, heads, or other specs of the engine. OF course, the CFM requirement is less than the MAXIMUM because the volumetric efficiency of a normally aspirated engine has to be less than 100 %. But the calculation is useful because you will know if the carb is too big for the job. Bigger ( too big ) isn't better when it comes to the carb, for sure.</p></blockquote><p></p>
[QUOTE="IBAJIM, post: 139458, member: 3676"] An engine is an air pump, plain & simple. By using the CFM calculator ( or a pencil and/or a calculator ) you can determine the MAXIMUM CFM required of a carb, assuming 100% volumetric efficiency. The MAXIMUM CFM has nothing to do with the cam, heads, or other specs of the engine. OF course, the CFM requirement is less than the MAXIMUM because the volumetric efficiency of a normally aspirated engine has to be less than 100 %. But the calculation is useful because you will know if the carb is too big for the job. Bigger ( too big ) isn't better when it comes to the carb, for sure. [/QUOTE]
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Classic Goldwing Technical Forums
Engine & Fuel System Modifications
740 carb 24mm bore CFM
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