Originally Posted by avid-fan
sorry will try to explain better.as my car has a recirc dump valve it has no loud whoosh noise
but very loud chatter.
i know its air backdraft through the turbo..but where is the sound actually emitting from
when it comes out of the car ??
If you have 'chatter', then your dump valve isn't really doing its job properly. The trouble is, to get the valve to be effective at higher boost, it may be too strong and won't blow at lower boost levels, meaning that you will still get some 'chatter'. However, if it is set up soft, so that you get no 'chatter' it may leak in high rpm low load situations.
This is why we generally don't use them.
Also, the sound is emitted from the intake of the turbo.
