Calibrating for the Future SAM Tech shares how to conquer the modern EFI tuning — including direct injection, torque modulation, and variable valve timing

Written By Stephen Kim Photography by the author EFI tuning, as we know it, is over. Stick a multimeter probe in it. Gone are the days of simply setting the fuel and timing maps, then calling it good. These days, it’s all about vehicle computer calibration. All of a sudden, the OEs