Installed diff bov, now possible compressor surge

Perkul8r · 08-11-2010

So i got a used Turbonetics Raptor bov and installed it on my car last night. I loosened the adjustable set screw on it cause it was set about all the way down. And i just retightened it a lil but. I am thinking maybe i went to far though. Because of the side exit exhaust i can usually hear the turbo spool down. And with the stock bov it was a nice and smooth spool. But now every now and then it when it spools down i can hear it fluttering. I was just wondering if this was compressor surge or not. i dont want it to screw something up. Thanks.

Matt D. · 08-11-2010

The blow off valve is fluttering, that is not compressor surge.

Perkul8r · 08-12-2010

The bov fluttering would cause the noise in my exhaust? The bov is recirculated so I barely hear it at all. All i notice is the whine of the turbo as it spools down fluttering in my exhaust. Sorry if my first post wasn't clear enough.

Matt D. · 08-12-2010

Compressor surge occurs when the turbo spools up and is under boost, not when it spools down.

**Shane@DBPerformance** · 08-12-2010

That is kind of a shitty BOV.

Perkul8r · 08-12-2010

Ok, Thanks matt for that info.

And is it really that bad of a bov? i mean i got it dirt cheap cause it was used.

CarPsyco84 · 08-13-2010

a lil bit of a flutter when you let off is not the harmful compressor surge and not a big deal, although a looser BOV will help get rid of it, if it bothers you. You will know when you get real compressor surge, my 50 trim does that if you roll on it before full spool rpm and let it build up, you will feel the power surge, and your boost gauge will jump all over.

awd-drifter · 08-13-2010

i think you will know when it's compressor surge. I'm sure the bov is just 'fluttering'

Fluttering
http://www.youtube.com/watch?v=jEUWEsqoWz8&feature=fvw

compressor surge
http://www.youtube.com/watch?v=nCj6Spwl1CU

i will have to retake another video of my car but my bov still sounds like this..which is fluttering. probably hear it flutter in the middle of the video.
http://www.youtube.com/watch?v=LcQ4h5gB_iI

Perkul8r · 08-13-2010

Thanks for the videos. It is definately not compressor surge that i am hearing. That's a good thing. That makes me feel better.

jrohner · 08-14-2010

Quote:

Originally Posted by Perkul8r

And is it really that bad of a bov? i mean i got it dirt cheap cause it was used.

Or because it's not very good AND is used.

CarPsyco84 · 08-15-2010

As long as it works... does it really matter that much?

Perkul8r · 08-15-2010

It does work just fine. I only paid $40 for it. Not complaining, I just heard something different after putting it on and some one here in town said it might be compressor surge, which obviously he was wrong. And i just wanted to know for sure before something broke. I appreciate your answers, and the stuff i learn from them.