MSD 6CT Ignition ControlRev limiting is controlled via microprocessor making it so smooth the chassis is virtually undisturbed when charging into turns. The rotary dials are also used to set cylinder select for 4, 6, and 8 cylinder engines, and to adjust the built in start retard providing options of 0, 10 or 20 of timing retard for quick starts. As an added bonus the LED display can be used as a live tach or will display your racecars battery voltage. The unit records the