Holley Carburetor: Idle and Transition Circuit Calibration Guide

website holley transfer slot adjustment When I had the carb mounted with this setup it seemed to run way nicer at idle After setting the transfer slots both primary and secondary to pg slot xo I was just watching the Holley video on carbs and they sate to adjust the idle mix screws 14 turn clockwise to lean out and counter to richen

holley transfer slot adjustment The transfer slot adds fuel to compensate for increased throttle opening before the main metering system kicks in This prevents a stumble under  It has very low vacuum at idle so I opened up the idle circuits a little This made the off idle transfer slots rich so I opened up the idle air  if your idle mixture screws have little to no effect then likely too much of the transfer slot is exposed my holley rebuild manual states that

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