BOV or Compressor surge?

[defrag010]

excuse my n00bness, but I came across this video and was wondering what kind of BOV is on that audi, or if the sound is just the sound of the compressor surging because of the lack of a BOV. To make it clear, i'm talking about the noise that goes "pshtshtshtshtshtsh".



http://www.kolumbus.fi/etelanlampo/kuvat/Temp/Dyno.wmv

 

[Dieselboy]

I have something going on Media Player, so I cant watch this vid. A BOV surging sounds like a chatter, studder, etc... It's common for almost any BOV to surge under a low to mid throttle release, but if its still doing it at a WOT release its usually from the valve screw being set too tight.

 

[99gst_racer]

defrag010 - I know what you mean. I hear the sounds in the video too. It sounds alot like compressor surge, but I think it's just the BOV fluttering. I recently drove my buddies SRT4 and his did the same thing. It fluttered between every shift. I though something was wrong, but he said it always did that and it was normal...... I dont really understand it either, but I just though I'd share this....

 

[olmytsi]

I absolutely love the sound a car makes when the compressor is surging. Do they make a bov dat sounds like that?