09-02-2013, 08:50 AM
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Join Date: Apr 2011
Posts: 1,092
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Quote:
Originally Posted by *13*
600 is not too small, if you don't plan spinning higher RPMs. In fact, a 600 cfm carb will have a snappier response.
RPM range is really the key. If you are trying to pull large amounts of air through the carb(higher rpm) you will need larger cfm. If you have a larger cfm, lower volumes of air have a more difficult time pulling fuel out of the Venturis(poor response).
So, the carburetor needs to be selected for its use, not max RPM
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Good advice, it's the throttle response vs. peak HP trade and what RPM band you will do most of your driving. Seems the cam also plays a role, I know my builder got with comp cams to discuss and agreed that a 650 willy's was the ticket for my 427w. |
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