ECU Tuning is a way of optimising engine performance software stored within a vehicles Engine Control Unit (ECU). As engines have become more advanced to meet emissions standards, so have their control units and the processing power within. There are many parameters which can be altered within the software of an ECU to optimise engine performance whilst remaining within engine design limits.
There are several uses for a more powerful vehicle during day to day use. Some owners may require more power for safe overtaking manoeuvres. Others may need more power when towing heavy trailers or caravans. Some drivers may simply want to upgrade their vehicle without the need to buy a new car.
The main power increase from a remap is the result of injecting more diesel into the engine when the driver requests full power. Alongside the increased level of fuel flow, there are other considerations:
It is important to note that not all of the vehicles we tune have electronic control of the turbo charger. As an example, the much older 2.0 HDI 90 engines have no electronic turbo control. This means that we set up the stage 1 remap to use the ‘spare’ air available without requiring an increase in boost pressure.
Continue reading: Is a remap safe?