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Hello,
I have aqeustoon about carb size. My 308 engine is relatively stock with extractors, single 21/2" exhaust and a mild cam. No head work has been performed. The car is manual and has quite high gearing (diff = 2.75:1) I want to install a holley carb. Is a 600CFM too big ? The info I've read on carb sizing seems to indicate a 390CFM would be the size. Any advice welcome.
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Why not stick with the quadrajet, Holden got the carb right on the 308s, they can't be beaten if setup properly!!
Peter
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The original carby, the quadrajet, is a 650CFM so 600 should be fine.
I would agree with Peter, Quadrajets are good carbies if you take the time to set them up.
Warren
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stick with the quaddie.mine runs like a dream day in day out
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