Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - bigger carbs for better mpg ???!!!
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Old 09-15-2012, 09:40 AM
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Qjets are one of the best designs. Avs and AFB are good too. The reason why drivability is better, because when the engine vacuum changes a rod opens or closes more of the jet hole depending on the condition. This maintains velocity. A Holley is really just holes and more throttle dependant. Tunning for some situations that is all you need. A carb responding to the engine vacuumin this manner should be better for more driven conditions.

They all can be tuned to work.
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