The ARC2 (Air/fuel Ratio Calibrator) provides additional features over the ARC1. These features make it possible to fit a MAF sensor to engines that were designed to operate with vane type air flow meters. It is especially useful for re-calibration of modified engines that have ECU (Engine Control Units) designed for MAP or MAF (Mass Air Flow) sensors, also compatible with GM and Karman Vortex applications. In addition to the low and high load adjustments of the ARC1, the ARC2 also provides adjustments for mid load and acceleration boost.