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Weber 40IDF Carburetor Venturi (Chokes)

Click for a larger picture of Weber 40IDF Carburetor Venturi (Chokes)
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These venturi will fit the Weber 40IDF only. Sold individually.

What size do I need?

The venturi size is the first step (after choosing the carburetor) in tuning a Weber carburetor to your application. It is tempting to use the largest size for the most airflow, but this can hurt performance. Too much airflow impairs low-end driveability. In fact, the car may not start or idle at all. And remember that the engine has a limit to how much air it can use. Feeding it more will not produce more power.

The book Weber Carburetors by Pat Braden (Part No. 5326) includes venturi selection charts based on engine capacity, use, and RPM.

Enter desired order quantities below, then click the "Add selected quantities to cart" button.

Order Qty
Part No.
Desc.
Price
Status

71506-28MM

Weber 40IDF Venturi, 28mm

$19.99In Stock

71506-30MM

Weber 40IDF Venturi, 30mm

$19.99Not In Stock
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Related Product Groups
Weber IDF Parts & Jets