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Q Jet Carbs

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Sean Murphy at Jones Performance Fuel Systems loves building Q-jets for high-performance engines because most people don't think it can be done. He uses Q-jets originally built for trucks (right) since these have extra air bleeds (arrows) that lean the mixture under normal steady load for better throttle response and economy. These carbs are rated at 800 cfm as opposed to 750 cfm for car units.