How much power can you gain from a tune-up and ECU flash?

The BMW Z3 Roadster is overdue for a tune-up, but how much can this actually increase engine performance on a dynamometer? Also, the Digital Motor Electronics on this BMW is flashed with some new tricks to further increase engine power. The spark plugs, fuel filter, and air filter are replaced, and the DME is flashed before the car goes on a Dynojet Dynamometer.

Видео How much power can you gain from a tune-up and ECU flash? канала Matthew Schroyer