Other than this mention I couldn't find any other info on it. Has anybody else heard about it, and has anyone with an Evo tried it?

http://www.youtube.com/watch?v=MU5Y6d9rh1k


Homepage:
http://www.synapseengineering.com/pr...hronicbov.html

 

seems interesting...

 

It seems interesting, functionally the only blowoff valve I'm aware of thats a pull setup is the HKS SSQV which doesn't work very well on the Evo..

Anyone know who I can contact to get one for testing?

It doesn't look like anyone has any yet.. Too new a product? As long as it has an SSQV or 1G DSM flange for it I can test it.

 

Maybe info@synapseengineering.com ?

 

Well Duhh , I meant a distributor that had any in stock for purchase..

 

i saw on one of the you tube comments that it would be going on sale in jan.
so they prob wont get any till then ><

 

I just saw this video. Very interesting.

I'm surprised no one has jumped on this yet.

 

We discussed this thoroughly on the turbo Civic forums. It seems like the best way to go for lower psi boosted applications. And of course, great for all others. It does have a recir. option too right? I forget at the moment...

 

Looks interesting.

 

It does. The video on youtube shows the attachment for recirc.

 

Functionally, this part is identical in operation to the HKS valve.

The only difference is the piston used inside the upper chamber of the valve.

It will work (not work?) just like the HKS, though.

 

Just saw this post...curious if anyone has tested this BOV...

 

Can someone remind me exactly how a BOV like the HKS works?

They say it is a "pull type" valve. This tells me that the valve will not open if pushed by the manifold pressure. Meaning lets say your running 40 psi of boost, the design of the valve is such that the manifold pressure will never overcome the spring pressure of the valve.

But what I don't understand, is that the top of the valve is also connected to manifold pressure. And I just don't quite understand, when you lift off throttle, the throttle plate closes, and manifold pressure at this moment maybe spikes? Oh wait, the vacuum / manifold pressure source for the top of the BOV is post throttle plate, so I guess the valve sees a vacuum all of the sudden?

But if seeing vacuum opens the valve, why is the valve not open when driving off boost? When you lift off throttle is there more vacuum in the manifold then normal off boost cruising?

 

PS I really don't like the sound of my HKS. This valve sounds a bit better I think. I've heard the Tial BOV's are pretty quiet even when vent to atmosphere. Is this true?

 

PS2... I ran my Evo 6 RS for 4 years with NO BOV as recommended by one of the top tuning shops in England (Simon Norris). I never had a problem with my 6 RS turbo. When I changed up to the 35R the old standard turbo seemed to be in excellent nick.

I personally found the car nicer to drive without a BOV.