As the vehicles ECU is constantly changing how it runs the engine based on sensors such as airflow meters, O2 sensors, temp sensors and knock sensors, when a vehicle is modified with parts such as downpipes, intercoolers, turbo’s, intakes, it can have a huge effect on how the ECU operates and can through a tune off course, so tuning the ECU is in our opinion the most important part of the modification process.
Factory ECU vs Aftermarket ECU tuning is pretty similar with the only exception is that OEM ecu tuning is limited to what the tuning software is able to let you change, where an aftermarket ECU is basically a mapped out ECU with all required options and additional features that are more suited towards Motorsport. The process of tuning both is the same with a little more work required for aftermarket ECU’s as you are starting from scratch unlike a factory ECU that has already had countless hours tuned at the factory.