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Porsche 911 991 → Technology explained – Porsche 911 Turbo, but what is the overboost function – and does it work?
We know it’s exclusive to the 911 Turbo, but what is the overboost function – and does it work? Extra performance is something we all may crave occasionally for our 911. Since 2004, Neunelfer Turbos have had this exact capability in the overboost feature. But what is it? To understand overboost, we need to consider the engine, because overboost is only possible on a turbocharged motor. The turbocharger supplies additional clean air, under pressure, into the engine to generate more power.