Why Do Turbochargers Whistle?
Why Do Turbochargers Whistle? What causes turbo whistle? Turbo whistle is the sound of the compressor inside the turbocharger speeding up (also known as ‘spooling up’, which is why it kicks in at the boost threshold (when the turbo starts to kick in) as you accelerate up the rev range. What causes excessive turbo whistle?