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Discussion Starter #1
My old carbs had "downleg" boosters. Newer carbs offer a choice between downleg & annular boosters. It seems to me that the downleg boosters are a bit smaller and don't detract as much from the carbs CFM rating. Are there advantages to using "annular" boosters? :confused:
 

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The major up side to annular boosters is throttle response. You are correct that the larger booster "can" effect high speed CFM. Without knowing more about your combo, I will not make any suggestions or assumptions. I will say that the throttle response of annular boosters is GREAT. They are more sensitive than standard boosters.
 
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