2 Step and Auto
It cuts spark randomly and limits RPM's
Many 2 steps have an activation or trigger source, activation will depend on which schematic you follow.
You can wire the 2step to a brake switch or even a brake light wire for an activation source. You would want to install a toggle switch inline to prevent the 2step from activating every time the brakes are applied.
If you have the 2 step set at 4k RPM and a brake switch then yes even with the pedal to the floor your engine will only rev to 4k. Once the brake is released the normal spark within the ignition system will takeover and off you go!
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It's an adjustable rev limiter. Unlike the factory rev limiter it cuts spark to alternating cylinders. This causes a rich condition in the cylinders that sends unburnt fuel into the headers/manifolds where it ignites & causes the turbo to spool.






