Fact - IN CHIP TUNING THERE IS NO SUCH THING For any formally qualified automotive/calibration engineer the reality of 'custom remap' debate is ignorant and frustrating for a number of reasons; Firstly - . After 2004 most engine management systems became a closed looped torque based model simply put, the engine management is adapting (optimizing) [...]The post Custom ECU Tuning files appeared first on ECU File Tuning Remap Portal.