Trust me, I have read up on it and I probably more confused now than I was before. I just can't find any definitive data as to which is actually more beneficial.

I am pretty set on the Synapse DV, but I would just like to get a better understanding either way.

 

I lied both don't have a diaphram.

I think the only difference is the BOV can be VTA or recirc.

The DV is smaller, the evo/audi guys like it becuase its a direct replacement.

http://www.motoiq.com/magazine_artic...ter-valve.aspx

I assume you read this article? protip, it has 7 pages.

 

a failed diaphragm is scary and potentionally very expensive 9 months later

 

Yeah, it's a good article. I think you are right, the BOV just has a cool factor the DV does not.

 

i'm thinking you are right And that the rattlesnake sound is just from the bov itself .this seems in keeping with what other ssqv/owners

 

the dv can be vta too


... figured I would add that to the mix up

 

Geesh.

 

in our car you would hear the air flow through the dv or the bov so really it will not make much of a difference when choosing as they both do the same thing and should sound very similar

 

check this link out. perhaps it will help in your decision.

http://www.modified.com/tech/modp-11...lve/index.html

 

I linked the video of 2 different evo's one running the bov one running the DV the sound is different.

 

im sure they will make different sounds but you should hear both.

The dv should be more responsive then the bov, specifically in very low boost

 

The DV is definitely right for me and the better choice I think.

 

I talked to one of the Synapse engineers a few months ago, and they said the DV and BOV are basically identical except for size. They eliminated the third nipple on the DV and made the package smaller.


So 6 or one 1/2 dozen of the other.

 

Good to hear! I will still take a video in Jan just for record keeping sake.

 

We have been having issues with qtdudes car stalling out after the accelerator is released from seeing boost. He was told by Jeff that this caused from his bov not being recirculated. Te treason being that it isn't feeding the air that the MAF read into the intake. So there is too much fuel. We are in process of recirc' ing the bov back into the intake after the MAF to solve this issue. Will let you know what we find out.

 

Forgot to mention that he's running 1000cc secondary injectors.

 

Yeah recirculating is a must for a Greddy turbo kit, that's basic info for any MAF based car actually. Why is he running secondary injectors on a Greddy kit? IIRC, he has a stock Greddy kit right?

 

That's old news man.... but with the HKS SSQV VTA luckily that doesn't happen unless you push the clutch in and hold it in and for me it only happens at highway speeds in 6th gear; and rarely am i on the clutch when slowing down

 

Are you talking about a VTA bov vs DV? Or a recirc bov? Atmosphere vs DV will definitely be different, since the atmosphere wont be muffling the sound to the same extent that recirc will. If you're talking about a recirc bov vs DV, then I'd be interested to hear how different they are. I have heard that a ricirc bov is louder than the DV's typically used on my car. I've also heard that the rebuildable DV's are louder too. I can see why they're louder, just curious how much of a difference it makes.

Either way, you'll hear it. Unless your exhaust is too loud or something. Mine are very easy to hear, even when I'm just hitting 5-6 psi. Not as loud as vta, obviously.

 

It's amazing how much quieter my exhaust is with the turbo. At least up to 4,000RPM anyway.

 

I noticed the same thing! eveyone hated my agency power exhaust w/o the turbo but now every one loves it! No more rasp around 4,000rpm

 

The turbo really quiets down the exhaust.

 

Yea I've been trying to tell that to people for about 3 years no one ever wanted to believe me.

I forget the thread but yea....

Let it be known, you heard it hear first.

 

http://www.turbosmartonline.com/index.php?id=44 these are nice

 

They sure are affordable and turbosmart makes some good products. I like the Synapse because I don't have to mess with redoing my flange since they sell a package fore people who have a Greddy BOV already.