ECU Remapping is taking the factory settings of the car’s computer and modifying parameters and tables to optimise for performance or economy, depending on the desired requirements of the customer and the operation of the vehicle.
The Engine Control Unit (ECU) which is also sometimes known as an engine control module or even the powertrain control module is one of your vehicles most important brains. This thing is fed by a bunch of vehicle sensors (oxygen sensors, crankshaft sensors, air temperature, and more) and processes that information based on pre-programmed parameters (contained within maps and often there are thousands of them). Signals are then sent out to adjust air and fuel mixtures for maximum power and torque and fuel efficiency.
ECU remapping can modify fuel pressure and injection timing and cycles, ignition timing, absolute boost, and boost delivery as well as throttle input maps and torque limiting maps. A modern engine can have thousands of parameters that are available to the knowledgeable tuner. Compared to modifications that are made downstream of the ECU, ECU Remapping allows us to take full control of all the available tuning parameters to deliver a transformed driving experience.