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What size carb will fit a 307 olds?

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Anonymous

12y ago
Updated: 8/19/2019

Actually any carburetor will work providing you do not exceed the maximum CFM's for your engine. Carburation is tuned by the jetting inside the carb to obtain the right fuel mix, so you could use a 2 barrel or a 4 barrel providing they are both jetted right for the airflow. The biggest carb you can use on this engine can be calculated with the following formula:

CID x max RPM / 3456 = CFM

whereas your engine is a 307 and theoretically if it is a street motor would see about 5000 max rpm then:

307 x 5000/3456=444 CFM's

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Wiki User

12y ago

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