As an example, we'll use a drag car with a Three Step Module SelecВ­tor plugged into the rpm socket of a 7AL-2 Ignition. The different rpm modules are activated when 12 volts are applied to a corresponding wire. By connecting one wire to the line-lock circuit, one module will be activated during the burnout. This helps keep tire temperatures consistent. When the line-lock button is released, the limit turns off. When you're on the starting line, you can activate the second limit through the clutch or trans switch. This provides a steady and consisВ­tent rpm for firm holeshots every time. When no modules are selected, the remaining high limit is active to protect the engine in the event of driveline failure.

• The Module Selectors can also be used with an MSD Timing Control. By plugging the Selector into a retard module socket, you can actiВ­vate different retard amounts at select times. This is a great feature for engines being upgraded to a multi-stage nitrous system. With the addition of an RPM Activated Switch, you can use the Two Step to activate a shift light at different rpm.The Module Selectors must be used with an MSD Soft Touch Rev Control or a Timing Controller with a high-speed retard module. No rpm or retard modules are supplied.
• Launch rev limiter
• Burnout rev limiter
• Set 3 RPM limits:
• Top End rev Limiter

Details:

• Emission Code: 5
• Warranty: Manufacturer's Limited 1 Year Warranty