I tried b4, piston type(greddy type-s,blitz and sheepdog) BOV all can make the flutering sound. All u need to do is just adjust the spring to hard. But dun blame me if ur turbo kong early. But never tried the likes of SSQV.
Not so much of the turbine wheel spinning the opposite direction ,in fact it can't ,but the 'collision' of air flow when the throttle is off and BOV restrictive.Originally posted by Defi@Jul 20 2004, 11:08 AM
you'll get that fluttering sound if your blow off is very tight.
The sound is your Turbine wheel spinning backwards, nothing to do with wastegate.