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The back of my Rochester quadrajet carburetor the 4 barrels dont open when at full throttle what could be the issue its a 1984 rochester on a olds 307.?
Wiki User
∙ 15y ago
Quadrajets have a maximum airflow of from 750-800 cfm. Because the secondary side of the carb opens according to the airflow requirements of the engine, the same carburetor size can be used on a large range of engine sizes. The basic 750 cfm quadrajet casting is used from 231 CID to over 400 CID - the big secondary air valves open only as the engine breathes. For example, on a mild 350 Chevy the air valve will never open all the way - because the motor can't use more than 600 cfm or so. Your 307 will simply not require the full use of the secondary air valves, at no cost of engine power however.
-DB, 1969 Hugger Orange Camaro
Wiki User
∙ 15y ago
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