First to have this BOV on a 2.0T

[rsquadGTi]

Just wanted to share my excitement. Just installed today.

Holds boost a lot better, has the option to run in Recirc or to full atmosphere. Compressor surge is non existent.

Throttle response is definitely much better.

i've ran the forge, euro jet and HKS diverter/bov before this.

Synapse Synchronic BOV.

Boost seems to come on earlier and much stronger than before (but that's just from my SOP feel) I'm extremely happy and this BOV have lived up to all of it's hype in the industry.





it's springless and diaphragmless.... A really innovative design.

[UberJAY]

how does it sound? im interested

[rsquadGTi]

Sounds pretty darn good. Very audible even when in recirc

[cbursten]

Any sound clips?
And just curious, but why would boost come on sooner?

[rsquadGTi]

no sorry none.

You can find soundclips on youtube. There's A LOT

[cbursten]

Originally Posted by rsquadGTi

no sorry none.

You can find soundclips on youtube. There's A LOT

On 2.0T's? I thought you were the first? (Not trying to start a shit-storm)

[rsquadGTi]

I am the first =O)

The BOV sounds generally the same on all the cars it's installed on. I don't see how it would sound different on the GTI.

[cbursten]

Cool, I'll check it out. Congrats and enjoy.

[GTIzzle07]

sounds ok, i personally like greddy type s, hks rocks too

[BlackRabbit]

cant beat the sound of forge supersize with cold air intake.

[UberJAY]

how much was it? how easy was installation?

[Mike@Forge]

This valve is a pull-type valve, exactly like the HKS SSQV.

Sure, it uses a unique piston design internally, which allows for unique setup options, but the function is basically identical to the HKS.

Pull-type valves respond only to vacuum in the intake manifold whereas push-type valves, like all of our piston based units, respond to a pressure differential between the charge piping and the intake manifold, making them more reactive to the volume of pressure that actually needs to be discharged.



The pressure in the charge piping, entering the bottom port shown here is actually acting on the plunger to keep it closed. The valve won't physically open until the intake manifold reference has reached a level to overcome the pressure in the charge piping allowing the valve to open and vent.

This is also part of the reason why pull-type valves typically making a chirping or whistling sound. Because the volume of airflow is actually restricted, which causes the chirp or whistle. A larger discharge capcity will have much more hollow of a whooshing sound with no accompanying tone.

A push-type valve can be forced open by the pressue in the charge piping pushing up on the piston or plunger as well as by intake manifold vacuum pulling up on it, making it a much safer design for more suitable for relieving pressure and preventing compressor surge than the makers of pull-type valves claim for their offerings.

[rsquadGTi]

To each their own I think it sounds awesome. Under the hood with my AEM intake it sounds "euro" and not ricey. This is to me of course. That being said I have a HKS BOV on my 335i so yeah hahahaha.

The Synchronic BOV is completely different than the HKS. It's the internals that make it so. (No diaphragm and no spring)

From my understanding Mike is 100% right about the HKS "pull-type valves typically making a chirping or whistling sound. Because the volume of airflow is actually restricted, which causes the chirp or whistle. A larger discharge capcity will have much more hollow of a whooshing sound with no accompanying tone."

You can see from these videos how completely different the Synchronic is compared to the HKS.... How the valve reacts to the changes in manifold pressure etc.

http://videos.streetfire.net/video/U...a-Sy_71566.htm

It uses 2 vacuum sources and one boost only source.

Synchronic BOV is a fast-acting design that functions as a blow-off, diverter (DV)/bypass and even a pop-off valve. The Patented (6,863,360) design eliminates the diaphragm with a multi-tier piston actuator that self-centers under pressure. This design is intended to significantly reduce or eliminate compressor surge and will not leak boost

It won SEMA best new product award in 2007 when it was released.

I personally love it. Just thought I'd let everyone know there is OTHER options out there that could be more beneficial and functional.

Valve typically runs from 150-200US

[Mike@Forge]

I acknowledge that the Synapse valve uses different internals than the HKS in half of the valve body, however, it is still a pull-type valve due to how the air flow passes through the valve from the charge piping into the atmosphere or intake. In this way, it is exactly like the HKS.

[rsquadGTi]

Originally Posted by Mike@Forge

I acknowledge that the Synapse valve uses different internals than the HKS in half of the valve body, however, it is still a pull-type valve due to how the air flow passes through the valve from the charge piping into the atmosphere or intake. In this way, it is exactly like the HKS.

I agree completely from that standpoint

[UberJAY]

so good for our cars or no?im guessing like like the HKS--- NO?

[rsquadGTi]

You have to take everyone's advice with a grain of salt (fan bois) and get an unbiased opinion.

Of course other BOV/Diverter valve makers will most likely say "NO" to protect their own product sales etc.

I'd say "YES" but this is coming from an owner of the product and a person sponsored by the company who invented it.

You'd have to ask someone who is un-biased and looks only at the design standpoint.

Everyone makes a a product that works.

I've tried them and I've found that this one gives me much better throttle response and holds more boost. This is my own personal opinion not a professional one.

[ViciousBread]

BOV acctually give you less HP. go read up on them.
i mean there sick but i thought you'd like to know,

[rsquadGTi]

Originally Posted by ViciousBread

BOV acctually give you less HP. go read up on them.
i mean there sick but i thought you'd like to know,

Your statement will confuse some people not familiar with BOV/Diverter valves in general.

Only way you'll lose power (minimal) is if the BOV is ran to discharge to atmosphere. When ran to atmosphere... at that split second the car will have a rich condition which would lead to a slight power loss (MAF equppied cars)

Mine is being recirculated thus no loss what so ever.

If you run a HKS BOV in recirc there would be no loss either.

So what you should say is that if you run a BOV to discharge atmosphere you run the risk of having some power loss on a MAF equipped car. This would not happen on a MAP equipped car.

Thought you'd like to know as well.

[Skin88]

hi

ur the 2nd im the 1st to have.

[rsquadGTi]

Originally Posted by Skin88

hi

ur the 2nd im the 1st to have.

Don't you have a 09 Rabbit? youc an't run a DV or BOV on a non turbo car hahaha.

Anyhow.... Coool. Then I'm the second in North America and the 1st in Canada =Op

Do you have your run in recirc or to atmosphere?

Pics?

[Mike@Forge]

I am actually really intrigued by the Synapse design concept and the piston setup they use. It's very unique, and I respect the fact that they've patented the concept for use in a couple of different applications. However, I have a big problem will pull-type valves in general, so I would like to see their concept incorporated into a push-type valve assembly rather than a valve that operates exactly like the HKS. That is my only gripe about the product. I don't have any clue if it will even function at all, being a springless design, but I would like to see it done nonetheless.