BOV vs DV's with high boost?
 

Just wondering why people choose BOV over DV's when running high boost?? Or does it not really matter that much.


Thanks for any help.

Where is your tuner/ builder? bov's mafless... DV's went you run a maf.. boost levels do not matter.

Oh ok cool, thanks....

My understanding (and please do correct me if I'm wrong) is that bov, bpv(by pass valves), and dv are all pretty much same thing. Typically people who run aftermarket Bov typically vent to atmosphere to make that cool sound, but if you're on a stockish ecu, the computer is expecting that rerouted air, so if you do vent out, you will have very rich conditions when you are letting off.
As far as higher boost, most of these valves should make a tighter seal with more boost, I'm not sure if the stock DVs work that way, if not I would see why one would change it out for high boost applications.

Nice, thanks!! Yea I run the Forge DV's now. I guess if need be I could just have them dump to atmosphere.

If you remove the maf and stock air box (which you will with any high hp build) you need BOV valves in either the y pipe or in the I/c. You Ned to be able to release the pressure during the shift or slow down.

Cant you just have the DV vent to atmosphere?

That's a valid question and I don't have a definite answer other than I don't think they can handle the pressure of say a 2 bar tune. I can't think of a single high hp build that uses diverter valves on any make of car

Did a quick search and the consensus is they can't handle high boost

I believe a few guys have It Ike that. But never did it myself. We usually put them on y pipe or ics.

Also I could run just one BOV in the center of the Y pipe if I wanted, right? Also where are the vacuum lines ran to? the waste gate?

Also if you delete the DV's and that tube they sit in do you have to do anything about that? weld something close?


I don't know this area that well and just trying to learn here :)

Yes 1 in the center is fine. If you delete the divertors you remove the tubing and the air box

I always thought the best place for the BOV is after the turbo.
If you're trying to protect it from surge, that would be the logical location.

Cool thanks. So the DV hooked up to the y pipe and air box?


I see from my research most guys are running BOV's on the Y pipe.

the y pipe is the most visual and easiest to work with but you can do them on the intercoolers as well if theres space and you don't want quite as much noise.(using the bumper to muffle the sound somewhat)

have bov in place of my two dvs, the two dvs made a very nice sound , when i changed the piping i lost that great sound so i went to the bov . the sound is not that great but it's back and the responce is way better with the new piping