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Anybody know what the CFM is on a Rochester 4 bl that came factory on a 250hp 327? (not a quadrajet, WCFB i think)
 

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Somewhere in the area of 350 cfm, at least that what the Carter WCFB's were.
 

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Anybody know what the CFM is on a Rochester 4 bl that came factory on a 250hp 327? (not a quadrajet, WCFB i think)
If it's a WCFB, it's a Carter not a Rochester.

Might be a 4G/4GC.

Yeah, it'll be small...
 

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There were 2 kinds the bigger cars used one around 500 cfm and the small blocks used a smaller one that was 400 cfm at most.
 
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