General Category > Quadrajet Carb Talk and Tips

800 cfm to 850 cfm

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Yahnke:
Cliff can my 800cfm be changed to a 850 cfm....you have my carb,if it can be done great and how much?? thanks Steve

Cliff Ruggles:
What is the carburetor number?.....Cliff

Yahnke:
7042240...this is the one I sent back in September..I need as much cfm as i can get since Buick's love big Carbs thanks Steve

Yahnke:
TTT

Cliff Ruggles:
The Buick castings for the 71-74 455's are the larger castings.  Edelbrock used the larger castings from the early 80's Chevrolet Truck engines to make their "850" cfm RPM q-jets.  They were nothing more than recalibrated standard units.  Your Buick 455 carb will flow as much as, if not slightly more than the Edelbrock 850 unit.....Cliff

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