Should BPV be audible on 1.5 FR?


Active Member
Nov 22, 2019

I was riding through empty, new and smooth tarmac paved roads today. Could not miss the opportunity, so turned off radio and performed some spirited driving exercises :drive1:whilst enjoying boost and engine sound. All was good, however I have noticed, that I hear woosh sound from BPV when I liftoff after full boost. Usually I am driving with music on or spiked tires created noise, but never heard BPV before on this car. Is that normal, or already there's a hole in air induction system somewhere :(. Or lost a piece of sound insulation during a winter.

What's your experience? Do you hear silent hiss/woosh under the bonnet, when you lift your foot from the throttle?
Listers, parts supplier