You'll need an exhaust gas analyzer then it's just trial and error. You MIGHT be able to find a performance shop to give you an idea where to start, but generally you'll need to set it up using some diagnostic equipment after some initial guessing.
what size of carburetor for a 390 2 barrel
My father has a early 65 with a 4 barrel carburetor.
how do i fix leaking spray pump on a 2 barrel carburetor
160 horsepower - 2 barrel carburetor 180 horsepower - 4 barrel carburetor
The 400 in the 1979 F150 has a 2 barrel carburetor , so unless your willing to change the intake manifold to a 4 barrel manifold and get a 4 barrel carburetor , I would stick with original equipment
Yes.
It was a 4 barrel Rochester ( Quadrajet ) Carburetor.
Yes, it had a Rochester 4-barrel carburetor.
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skim heads. does not matter 2 or barrel carb
Float leval wrong are bad floats. Low fuel pressure, stoped up fuel filter. May not have gotten the carburetor clean enough. IT is running to lean.
Currently the largest carburetor that Weber sells is the 55DCO SP. It has a retail price in the $450.00 range and is a two barrel side draft compatible carburetor.