Why should I reprogram the standard ECU rather than buying a new aftermarket unit?
There are many reasons to stay with the standard ECU: • Specification The ECU is extremely fast and has a very powerful processor. • Development Subaru spend several million pounds in software calibration and we can benefit from this. We only need to work on approximately 3% of the data contained in the ECU. This way we retain all of the difficult and time consuming mapping such as transients, warm up, cold start, overrun. We can then concentrate on mapping outside the parameters set at the conservative setting issued at the factory. Aftermarket replacement ECU’s cannot ever hope to compete with the speed, power and complexity of the standard unit, this is why the ability to re-map in the way we can renders these units and add-on signal modifiers obsolete. • Functionality All functions of the standard ECU remain. Features such as diagnostic trouble codes, ECU control of the climate system, vehicle immobiliser and fault code memory. None of these functions are available with replacement
