The Programmable Signal Calibrator provides precise calibration of fuel by adjusting fuel control signals. It can be used with naturally aspirated or forced induction engines. Through a serial interface, the Programmable Signal Calibrator can be programmed by a laptop computer running the Split Second R4 software. The software provides three dimensional mapping of the fuel control signal according to engine load and RPM. Several versions of the Programmable Signal Calibrators are available that are compatible with MAP, MAF, AFM and Karman Vortex applications.