Adjustable Timing Light Base Timing Basics
Base Timing Basics Though an adjustable timing light isn't necessary to set most stock engines' base timing to the manufacturers' suggested setting, some modified street or race engines can require a spark lead setting that's outside the front cover's stationary range. An adjustable timing light can be used to set base timing to virtually any reasonable point. Simply unplug the vacuum advance unit, adjust the timing light to the desired initial setting, and rotate the distributor until the balancer's variable TDC mark is aligned with the stationary TDC mark (0) on the front cover. View Related Article
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