When you “tune” a car, what exactly is it changing?

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TIA

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Anonymous 0 Comments

It changes the ECU (engine computer) settings to be more aggressive and extract more performance from the engine by making turbocharger work harder among other things.

From the factory, an engine is often not at max performance capacity for a variety of reasons, chief among them, reliability. It’s better for a manufacturer to detune the ECU and put less strain on the engine so that components will last longer.

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