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Old 04-30-2013, 04:35 PM   #8
B_C_Ries
Beastly Adventurer
 
Joined: Mar 2013
Location: Imperial Valley, California
Oddometer: 1,345
there is an air jet or passage that interacts with the fuel jet, different carburetors may have different sized air passages,

I've jetted Weber Carburetors and they have interchangable air jets, most carburetors just have an air passage of a fixed size, brave tuners can drill out these passages to effect mixture,

A carburetor can have smaller air passages or jets and small fuel jets and run richer than a carburetor with larger fuel jets and big air jets,

Herr Bing was kind enough to put numbers on each carburetor so you have a clue if something might be different inside
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