Need Rochester Carburetor Help

ViceGuy · 03-25-2007, 01:32 PM

Greetings: Does someone know how to determine the CFM of a stock Quadrajet on a 1970 Cutlass with the Rocket 350? I found some numbers on the carb, but not too sure what they mean. Any help would be greatly appreciated. And while I'm here, could someone tell me the max CFM I should be looking at with the 350 engine. Thanks in advance....

70Wcars · 03-25-2007, 01:39 PM

Q-jet were only made in 750 and 800 CFM...your 70 Olds will be a 750, but few flow that as delivered from the factory. Hope this helps.

ViceGuy · 03-25-2007, 01:43 PM

Thanks Dan.... I'm looking to replace it with another Quadrajet and found one that has been rebuilt / tested. That one was is a 750. Wanted to make sure that I would be replacing it with a correct one. Thanks again.........

03-25-2007, 01:32 PM	#1 (permalink)
ViceGuy Junior Member Join Date: Sep 2006 Posts: 6	Need Rochester Carburetor Help Greetings: Does someone know how to determine the CFM of a stock Quadrajet on a 1970 Cutlass with the Rocket 350? I found some numbers on the carb, but not too sure what they mean. Any help would be greatly appreciated. And while I'm here, could someone tell me the max CFM I should be looking at with the 350 engine. Thanks in advance....

03-25-2007, 01:39 PM	#2 (permalink)
70Wcars Member Join Date: Jan 2007 Location: Texas Posts: 55	Q-jet were only made in 750 and 800 CFM...your 70 Olds will be a 750, but few flow that as delivered from the factory. Hope this helps. __________________ Dan S 70 442 W-30 4-speed 70 442 W-30 Post Coupe Bracket Race car..11.43 @ 3650lbs.

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03-25-2007, 01:43 PM	#3 (permalink)
ViceGuy Junior Member Join Date: Sep 2006 Posts: 6	Thanks Dan.... I'm looking to replace it with another Quadrajet and found one that has been rebuilt / tested. That one was is a 750. Wanted to make sure that I would be replacing it with a correct one. Thanks again.........