Carb Venturi Size for 470 ci

roccodart440 said

I run a proform 950 and it's 99% street use. I've always preffered a holley style carb.

That engine will gladly handle the biggest square bore carb and be very responsive.

Also, unless you don't know how to tune a carb, i'd stick with mech sec.

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Thank you. Do you know what venturi size your proform 950 has? I'd guess it's identical to the brawler at 1.45"?

And yes, mech secondaries only. I haven't owned a vac secondary carb since high school.

I think it's interesting that people generally refer to carbs by their fake cfm ratings and disregard the venturi and throttle bore sizes for the most part.