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Originally Posted by chickenwing
Could someone explain what those #'s mean? I know cfm means cubic feet/minute.T he 28" means inches of water? And why only 6 sets of #'s? I was expecting 16.
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The first numbers are valve lift, the next numbers are the cfm it flows at that lift. The 28" is inches of water, most heads are flowed at 28". All those numbers are from one intake port and one exhaust port.