Down Leg vs. Annular Boosters
01-10-2006, 01:12 PM
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Down Leg vs. Annular Boosters 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? 
01-11-2006, 02:33 AM
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An annular booster will allow a much larger cfm carb to be used (along with it's better top end) on a engine that would most of the time want a smaller carb if it was using dog leg boosters...
The reason for this is because the Annular boosters have a much stronger signal than the dog leg booster (and better atomization of fuel) and will give much better low speed operation for a given size carb.
The reason for this is because the Annular boosters have a much stronger signal than the dog leg booster (and better atomization of fuel) and will give much better low speed operation for a given size carb.
