When talking about modified cars, one term that gets thrown around a lot is ECU tuning. What is it? What sort of effect does it have on performance?

GM's E67 engine control unit (ECU) is the brain behind the LS9 and LS3, as well as many garden-variety four-, six-, and eight-cylinder GM engines. Because of its fast processor and plentiful memory, ...

Discover the process of unlocking the BMW F90 M5 engine control unit for performance tuning. This step-by-step DIY tutorial ...

If you’ve never heard the term flashing an ECU before, no, it’s not showing a form of identification or using a photo flash—or any other type of flashing for that matter. Flashing an ECU is tuning or ...