Ideal for dyno tuning.This programmer has two control dials that provide instant editing of the cylinder-to-cylinder timing, step retards and the start retard values in 0.1° increments. When a change is made it is instantly encoded within the MSD unit and stays in effect until another change is made to that specific program. This way, you can make timing adjustments in real time and see the results immediately on the dyno. For use with MSD Programmable Digital Controls (121-6212, 7530T, 8977, 8979).
