Quote:
Originally Posted by briphaeton
I use the stock jets. Never had a reason to pull the top off the carburetor.
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Quote:
Originally Posted by denis4x4
Same here
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OK, but these carbs are offered as O.E. & aftermarket on engines such as the V-6 Ford engine (2800cc - 170c.i.) all the way down to a 1600 cc VW coming in at a whopping 97 cubic inches. With a Model-A/B engine coming in just over 200 cubic inches, there is quite a bit of variation between venturi sizes and jetting. As I recall, the Model A carb is like 110 cfm ...yet there are 2 or 3 different venturi sizes that allow those Weber carbs to be like 220 cfm up to a 330 cfm. Jet sizes are also respondent in correlation to the venturi size. My point is you could very easily purchase a carb that is too small or too large for your Model-A.
Personally, if I were the OP I would contact the company that manufactures Weber carbs (I cannot remember their name but they are based out of California) and give them all the specs on your engine and let them give you a recommendation based on your engine combination for venturi size, idle & main jet.