Has anyone heard of the BNR stage II for the S4 surging with the Blitz BOV that looks like this....http://www.teamfc3s.org/store/images/DSC03553.JPG Also how much shorter would i have to make this to work with a FMIC kit for our cars? I was told by brian at BNR that this BOV would make the boost surge i believe? I have never heard anyone say that before though so i'm curious as if anyone else has experienced this i haven't seen any threads regarding this.

 

Blitz BOVs have a reputation to leak and/or malfunction. Compressor surge is caused by boost travelling backwards after the throttleplates have closed so it's not so much a turbo issue but rather a BOV issue.

 

You gotta define for us exactly what you mean by surging. Surging idle, surging boost? what exactly.

 

I already stated it, surging boost. So should i sell this BOV?

 

or will it work i don't want to **** anything up. I heard good things about Blitz but maybe not...

 

Everything except their BOVs are pretty high quality. If you have a FMIC why not just get a new BOV and have a flange welded on?

 

money my friend money. Well whats a decent BOV thats not insanely expensive that doesnt sound ricer. i know were not supposed to base BOV's off sound but god i hate the high pitched sounds, i just want a deep woosh nothing annoying. The BOV came with my FMIC i bought its a used HKS fmic, same with the BOV.

 

surging is the point of operation where you get a large amount of compression on a small amount of air. It can cause catastrophic failure of your turbo due to the large forces present during surge. Usually makes a lot of noise.. somewhat similar to cavitation. Definately something you don't want.

I've never witnessed it on anything I own, but I imagine you could watch your boost needle vibrate back and forth during the surging.

Another definition:
When the turbos pump more air in the motor than the motor can physically flow through, then the air reverses back to the compressor. Kind of like closing the throttle bodies.

 

Ok, so basically should i get rid of this BOV.