[Slim415]

After getting my new VRSF and Tial BOV installed, I was surprised that I could barely hear it. I mean it's really quiet. To the point that my Audi's were louder, and those ran DV's which are quiet to begin with. And when when it vents, it makes this 2 part sound. I don't know if it's fluttering because it doesn't totally sound like that but it's definitely not a "whoosh". It should be noted that I have a 2011 335is with no tune, but DPs and intake. So I'm not sure if the "S" model has higher boost then the normal models but I still would think that it should be louder then it is. Definitely doesn't sound anything like the vids I watched on YT. My mechanic connected the vacuum tube that was supplied by VRSF to the pipe that the DVs were connected to originally.

[stewbets]

First off, my understanding is that Tial BOV's are on the quiet side. Running at stock boost levels of ~8 psi is also going to contribute to a lower volume. I also wonder if you're getting enough vacuum to the BOV. Many have reported that they needed to install a larger diameter fitting into their manifold and run a bigger vacuum hose to get the proper response. I'm running a fake Tial Q 50mm and while it's not loud, you can definitely hear it. I ran a dedicated vacuum line for it and it only makes a singular woosh sound.

[Jeff@TopGearSolutions]

https://www.e90post.com/forums/showt...highlight=tial

[Slim415]

Originally Posted by Jeff@TopGearSolutions

https://www.e90post.com/forums/showt...highlight=tial

Instead of cutting off the nipple thing and doing all of that, I found a BOV adapter online. It's the "BMS N54 BOV Vacuum Adapter". Would this do the same thing?

[Slim415]

This is the adapter I'm talking about.

[stewbets]

Yeah, that would accomplish the same thing, but for $70? I guess I'm too cheap for those kinds of solutions.

[Slim415]

Originally Posted by stewbets

Yeah, that would accomplish the same thing, but for $70? I guess I'm too cheap for those kinds of solutions.

I just don't want to make any permanent modifications to the vacuum system. I would rather use an adapter then cut off a piece and glue on another \(o__O)/

[HKD126]

Originally Posted by Slim415

This is the adapter I'm talking about.

Works very well.