They are all just noise makers really, the only upside is getting rid of the OE unit which is kinda a joke for robustness. It looks like it'll fail very quickly. I did the Mountune unit recirculates the air just like OE. But it is uprated, much better quality than OE.What exactly does this mod do except make pssshh noises? Any reliability issue i should worry about? Pros and cons?
The boomba is vent to atmosphere so you will here it much more, unless you get the adjustable model. The Mountune operates like OE so it vents back into the system, so you don't hear anything louder that the OE sound.
Actually this is incorrect. Maybe on a MAF tuned car where the ECU is expecting to see that air, but on a MAP tuned car like the Focus ST where the ECU operates an electronic solenoid that opens and closes the BOV or BPV, there is absolutely zero lag introduced by running a BOV.BOV's still create turbo lag though. That's why I went with Mountune's recirc. valve to solve the stock wimpy plastic error that Ford shoulda knew better on.
BPV's recirculate heated air through the system though, that's why I went with Boomba's BOV. The stock unit works fine on a stock car BTW, it doesn't work very well once you turn up the boost though.BOV's still create turbo lag though. That's why I went with Mountune's recirc. valve to solve the stock wimpy plastic error that Ford shoulda knew better on.
Here's what that sounds like:Has anyone had experience with the adjustable BPV? How loud is it with one screw out? I didnt want something as loud as a 100% VTA or even a 50% and so Boombas adjustable BPV looked very enticing to me. However i cant seem to find a single video or review of it anywhere.