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#1
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The SB2 SBC head that NASCAR uses flows 40 cfm and they put them on 350 chevy's.
Those 672 plus BBC's have 520/540 cfm heads. |
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#2
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Quote:
40 CFM ? My Briggs 5HP go-kart block intake port flathead flows more than that... you must mean 400 cfm ??
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