General Category > Quadrajet Carb Talk and Tips

Q Jet on built Buick 455

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JayZee88:
Hey all,

I got a dilemma with my build. I am swapping another Buick 455 into my 70 Electra. With my new motor I got a stock 455 q jet. It has this cam

http://taperformance.com/proddetail.asp?prod=TA_413-455

also has 9.6 static compression, estimated 580-615 hp, My problem is with the carb requirements. In the Buick community its well known Buicks love alot of CFM. I am looking to rebuild this q jet to handle 900-1000 CFM, but is that even possible? Its going to be a street driven car, and the q jets have good street manners and decent mpg for a 4 barrel.

Frank400:
Welcome to the forum !

   What is the number on the Quadrajet you plan on using ? 

JayZee88:
Glad to be here  :D

the number is 7041540 MF 2320. Its a 800 CFM off a 71 Electra I believe

carmantx:
That is a good quadrajet to work with and can handle your 455.
It will require idle circuit modifications so it will idle correctly with the cam change.  Cliff can fix you up with the correct jets/rods and other items.

No need to try to increase the cfm of this carb for your engine and driving needs.  It will be sufficient for you.  I run the Buick quadrajet on my Buick 455, with more compression, larger cam and Stage 1 heads.  I race the car some, but mostly street driven.

JayZee88:
do you know how much work like that would cost? The Q needs a good polishing to  :)
Just out of curiosity how much CFM cam you get out of one of these Q jets without going crazy on cost?

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