Venturi on Weber 40s?, Venturi advice |
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Venturi on Weber 40s?, Venturi advice |
Boothy |
Jun 21 2022, 07:10 AM
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#1
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Member Group: Members Posts: 88 Joined: 17-January 19 From: Abington, MA Member No.: 22,805 Region Association: North East States |
Morning All,
I've searched but haven't located the info on venturi sizes for Weber 40s. I have a 1.7 with a big bore and CB carb cam. The Weber I have came with a bag of venturis so I'm trying to determine the right size. Thanks in advance! |
Al Meredith |
Jun 21 2022, 08:43 AM
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#2
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Senior Member Group: Members Posts: 960 Joined: 4-November 04 From: Atlanta, ga Member No.: 3,061 |
I have the Weber manual and it has graphs that give a quick way to figure vent size .500 CC single cylinder per carb barrel indicates at 5000 RPM max power about a 32MM to 34MM vent . Go to "www.aircooled.net" and you will find all kinds of formulas and "rules of thumb" for picking vent size and jet size. |
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