john deere model a cyclone

(quoted from post at 20:10:21 11/11/12) what do people mean when they say cyclone A, or cyclone B.is that simalor to the supers that farmall had

Refers to the "eyebrow" cast into the head above the intake valve. It was supposed to increase the turbulent stream to create better mixing of the fuel and air. Doesn't have to do with any carb jetting.
 
Just posted these on my 52 A with a water pump link...

JDAHead3.jpg


JDAHead2.jpg
 

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