Diverter Valve

[h100vw]

They don't last forever but it is time more than boost that causes std DVs to fail. Often they have gone and you wouldn't know without looking.
Gavin

[shaneth]

Ive never had one fail on me but surely you would be able to tell something with how the car reacts. And maybe some of these good beople just wanna hear a sound from it.

[h100vw]

I reckon that it would get laggy during gearchanges, if the boost isn't released the turbo would start stalling. I don't recall seeing any codes getting thrown on cars I found with bad ones.

Gavin

[shaneth]

Often they have gone and you wouldn't know without looking. Gavin

I reckon that it would get laggy during gearchanges, if the boost isn't released the turbo would start stalling. Gavin

So you are saying you would notice??? I thought you would and not only would it get laggy but it wouldnt do your turbo any good not having anywhere for the pressure to be released to. Gavin are you a mechanic.

[h100vw]

Yeah it looks a bit contradictory now I read it again but I doubt 'man on the street' would recognise that the car was different. I have taken a few duffers apart and the diaphragm was only partially split. So I guess that the DV would fail over time and get progressively worse. The check light hasn't come on when I have found bad DVs.

It is bad for the turbo but if the car was still having dealer services they should catch the fact it has gone during a roadtest. I think it would take some rough treatment over a period of time for cause significant damage.

I am an Avionics Engineer for a day job but I am pretty well read on VWs in general as I run an A3 turbo with FMIC, 3 inch turbo back system. I have an 04 turbo and ancilliaries in the garage awaiting a few free days.

Gavin

[shaneth]

Thats cool just thought i would clarify.

[Spec83]

I have had a little bit of experience with BOSCH valves runinng on 180's with upto 18psi... Never seen any problems. They are designed for a stock application but are farily well built (just because they are not shiny Aluminium doesn't mean they are poo) and as long as they are used within those limits you should have trouble free motoring... As Gavin said a lot of the time the diaphram splits or seat wears causing leakage... Mots of the time you will notice if your BOV has gone as it will start to leak boost causing preformance loss...

If it does seal shut - it will start to get laggy as the air returning from the throttle body will cause the exhaust wheel to spin in the reverse direction which is definatly not good. Also notice some cars that sort of pulse with BOV discharge - this is due to compressor surging and is also not good. If you have this sounds look at it asap...

The reson most change BOV is becuase the stock spring preload can no longer hold the diaphram shut under load and the BOV is forced open under the boost pressure in the piping - but i think we are talking upwards big boost here

Don't get me wrong if you want the sound then its not a waste of money... to me it is thou... but if you get one make sure it is a dual stage with plumb back and trumpet... Took me ages to find that problem on a 180 when it kept stalling at the lights.... I used to have to sit @ 2000rpm... everyone thought I was up for a TGP

[Guy_H]

We use the stock Bosch one on our Polo GTI (~18PSI) and its as new after 13,000km's

On our TT we run ~26 - 28 PSI and a stock new Bosch DV, 10,000km's + still like new. The action of the diaphram types is quicker, even if they are not as bulletproof as an alloy unit!

[fuzion]

funnily enough ive had 2 go on me .. strangely enough!

as mentioned, stock is best but lasting it all depends i guess. doesnt hold driveshafts together tho

[Kai]

Well.....

I thought id get one and try it too see what happens.

It works well. Makes a not so loud noise. But does make a noise. Which is what i was after. For anyone thats wants to pay for one. 309 is how much they are. I may or may not have payed.

If i ever get sick of it. I can just chuck the old one straight back on. Or turn this to plumback only.


Pics will take forever to load on 64k

http://images.cainer.net//uploads/Picture204.jpg

http://images.cainer.net//uploads/Picture001.jpg

[mitch_gti]

My brother is pestering me to buy one of these turbosmart thingies.

because my forge 007 whatever doesnt make anymore noise than standard.


With the turbosmart, what kind of a noise does it make, does it give a little flutter? or is it just the normal pshhh?

[Kai]

it gives more of a ccccht noise. Not a pssscht noise.

I wouldnt really recommend it for the wank factor. But mine on the lowest setting.

[fuzion]

plus the more boost you run, louder it'll be ..

the gfb ones are slightly louder (the normal plum back) compared to the 007.

the new forge dv-bov's are about $300-350 tho, cheaeper then the gfb stealth fx at $450+!

[Flaps]

Judging from the first pic Kai, it mon't make much noise because it's venting straight under the engine cover.

Atleast the plugs are staying awake.

[Kai]

Judging from the first pic Kai, it mon't make much noise because it's venting straight under the engine cover.

Atleast the plugs are staying awake.

That was just to show it can easily be hidden