The Universal Boost Timing Master allows you to adjust the ignition timing in relation to the boost pressure plus it has a built-in inductive ignition. You can adjust the control knob to retard the timing 1-3 degrees per pound of boost, up to 20 degrees. The increased spark plug output of the BTM helps burn the fuel mixture more efficiently resulting in more power- a definite advantage when boost pressure is increasing. The Universal BTM is designed to work with most single coil factory or aftermarket ignition amplifiers and points type distributors.