Web Oct 7, 2015 There are two different size throttle bores on Rochester two-barrel carburetors, one is 1 1/4 and the other is 1 1/2 inches. ... Most Quadrajet carburetors delivered roughly 750 cfm, but some reached … From chevyhardcore.com
Web The Quadrajet is a "spread bore" carburetor; the primary venturis are much smaller than the secondary venturis. By comparison, a "square bore" carburetor has primary and secondary venturis of similar size. Most … From en.wikipedia.org
QUADRAJET CASTING NUMBER CHART - CLIFFS HIGH PERFORMANCE
Web Identify a Quadrajet – Quadrajet Number Search 1966-1975 Rochester ID number breakdown EXAMPLE – 7041240 – 1971 Buick Federal Quadrajet: 70 41240 (Our Example) 70 – Prefix for Rochester carburetors: Decade … From cliffshighperformance.com
Web Two basic sizes of Quadrajet were produced over the years; 750 and 800 CFM versions. The 800 CFM unit (identified by a slightly larger primary venturi) was relatively rare, found only on 1971-73 Buicks and 1973 … From motorstate.com
Web Jul 30, 2013 Q-jets came in two basic castings, 750 cfm and 800 cfm. The difference is in the size of the primary venturi (shown below). There was a one-year-only Pontiac carb ('71 IIRC) that had a booster ring removed … From hotrodders.com
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