Rochester Quadrajet Carburetor - Getting To Know The Rochester Quadrajet
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Do you want to increase a 650-cfm Q-jet to a 750-cfm? Simply grind some material from the secondary stop lever. If your secondary air valve does not open perpendicular to the air horn, then the air flow is limited. Grind this tang to make sure the air valve opens fully. There was no internal difference between a 650- and 750-cfm Q-jet other than the factory set the air valve to open all the way. View Related Article
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