Porsche/Audi Diverter Valve

[Homer]

Installed a few weeks ago, I finally took some pics. Shifts are amazing, idle is so solid. I don't miss my BOV.
http://homer.turbomorley.net/gallery/d/3110-2/IMG_0668.JPG
http://homer.turbomorley.net/gallery/d/3113-2/IMG_0666.JPG
http://homer.turbomorley.net/gallery/d/3116-2/IMG_0663.JPG

[volvo740t]

I want one...

[Homer]

They are pretty cheap. 45$ is what I paid for mine. Bosch part.

[ShadowofBob]

They are nice until you start pushing 15+ PSI then they flutter like mad. Mine was super smooth and always worked well with no flutter on my stock T3 even up to 15 PSI. Didn't like my T3/T4 hybrid though.

[Homer]

Well yeah. I'm running 7psi. That's a reason I chose it.

[acbarnett]

Better yet, forge makes a drop-in replacement that's great for 1 bar+ applications, it's only ~$100 too iirc and you get a few different springs etc.

I got one for my car after the diaphragm went on my stock bosch diverter

[MrBill]

007 woulda rocked

[dl242gt]

I used to use that one. If failed on me so I bought the SaaB direct replacement version made by Forge. It's not the rebuildable one but it is the next level with a piston and seal instead of the diaphragm style.

[Homer]

What psi?

[acbarnett]

What psi?

I know a bunch of people who are putting 20+ psi through their forge CBV's, they're pretty much the only replacement for the bosch that you can get away with on the trionic 7 cars and they seem to be designed accordingly

http://www.ttstuff.com/images/forge/FMDV007P-BK_540.jpg

http://www.ttstuff.com/images/forge/FMDV007P-PL_540.jpg

you know you want it

[Homer]

No. I know I want the faster diaphragm type.
I was asking what psi dave's failed at.

[spe1983]

I've been wanting to get the turbosmart plumb back valve for my turbo car. would be able to choose between BOV/CBV type set up.

[MrBill]

forge 007>>>>>>>710n, or whatever yours it

They're good for like infinity psi. no failures!

[dl242gt]

No. I know I want the faster diaphragm type.
I was asking what psi dave's failed at.

It gave a good service life of a couple of years running 12-13psi. I think it failed due to my kjet not having a path to shoot the air directly to the turbo inlet. My air return is a bit further away. With wide open throttle and low boost like 6psi it works great. But in the area from around 8-10psi or so I get a backfire out the tailpipe which I think is caused by the airflow reversing and popping the air flow sensor closed. That may also have affected the cbv. When it failed it had a punctured diaphragm causing idle vacuum to go up to around 4in hg. So I bought the Forge stock Saab replacement which is a sealed version for around $90 a few years ago. I think you'll be fine and for the price the Porsche/Audi one is worth using.

I've used the original all rubber unit for a year or so without failure. Upgraded to the brass insert Porsche/Audi unit which lasted for a couple of years. Then I bought the Forge Saab replacement unit which is about 3 years old now.

[Homer]

forge 007>>>>>>>710n, or whatever yours it

They're good for like infinity psi. no failures!
Based on budget and current setup, the 710n best suited me. If I was running higher psi, forge is where its at.
It gave a good service life of a couple of years running 12-13psi. I think it failed due to my kjet not having a path to shoot the air directly to the turbo inlet. My air return is a bit further away. With wide open throttle and low boost like 6psi it works great. But in the area from around 8-10psi or so I get a backfire out the tailpipe which I think is caused by the airflow reversing and popping the air flow sensor closed. That may also have affected the cbv. When it failed it had a punctured diaphragm causing idle vacuum to go up to around 4in hg. So I bought the Forge stock Saab replacement which is a sealed version for around $90 a few years ago. I think you'll be fine and for the price the Porsche/Audi one is worth using.

I've used the original all rubber unit for a year or so without failure. Upgraded to the brass insert Porsche/Audi unit which lasted for a couple of years. Then I bought the Forge Saab replacement unit which is about 3 years old now.

Good to hear.

[Angus242164]

I'm tempted to use one of these in future, I have like 15+ of the Saab brass piston type sitting in my shed doing nothing, so if they start failing I won't run out of them for a while, and they only take 5 minutes to replace.

Turbosmart make this replacement:

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

Unfortunately their pics seem to be down at the moment! It's similar to the Forge valve, but adjustable with a knob.

[aibast]

I'm running one :) Audis metal by-pass. Sound great :)

[JW240]

looking good :rockon:
(and nice welds btw!)

[boosted]

forge 007>>>>>>>710n, or whatever yours it

They're good for like infinity psi. no failures!

tell that to us.. the audi dealer, who are replace POS forge valves left and right because they fail and make the car run terrible

[MrBill]

then they were not properly lubricated or something.

007 cant fail, its like.... not possible.
And as I said, I had a nice shiny 710n, it failed after like 300 miles

[amargill19?]

nice welds.

when you had your BOV installed you had some idle issues eh?

this bosch unit doesn't make any noise?

[volvero]

what about this knock off:

http://cgi.ebay.com/ebaymotors/_Car-Truck-Parts-Accessories__Bosch-Turbo-Bypass-Valve-for-Audi-Porsche-VW-Diverter_W0QQitemZ360091852466QQadnZCarQ20Q26Q20Tr uckQ20PartsQ20Q26Q20AccessoriesQQadiZ2865QQcmdZVie wItem?hash=item360091852466&_trkparms=72%3A543%7C39%3A1%7C65%3A12%7C240%3A1318&_trksid=p4506.c0.m245

[crazy0000]

then they were not properly lubricated or something.

007 cant fail, its like.... not possible.
And as I said, I had a nice shiny 710n, it failed after like 300 miles

I agree, I don't think you could make it fail... I mean the worst possible thing that could happen is like, it might make a squeaking noise when the lube dries up. Other than that what could happen? Its a solid piece held down with a solid spring, whats there to break?

[240T man]

I tried 3 different Bosch CBVs. They all sucked. They'd often stay open, not allowing boost to build.

[jutny]

my 710n's are doing just fine :oogle:

[crazy0000]

I tried 3 different Bosch CBVs. They all sucked. They'd often stay open, not allowing boost to build.

Thats why you get a forge, and let boost push against it to help it stay shut.

[project volvo]

I know a bunch of people who are putting 20+ psi through their forge CBV's, they're pretty much the only replacement for the bosch that you can get away with on the trionic 7 cars and they seem to be designed accordingly

http://www.ttstuff.com/images/forge/FMDV007P-BK_540.jpg

http://www.ttstuff.com/images/forge/FMDV007P-PL_540.jpg

you know you want it


wouldn't a greddy work? i imagine there are more than just 1 cbv that would work

[volvero]

Has anyone here tried the ebay knock off diverter valve?? any good?

[BDKR]

They are nice until you start pushing 15+ PSI then they flutter like mad. Mine was super smooth and always worked well with no flutter on my stock T3 even up to 15 PSI. Didn't like my T3/T4 hybrid though.

Uh oh :omg:

[shellshock]

Rough idle with your BOV? Were you re-circulating it back into the intake or venting to the open air? I know 2.4 likes to stall every now and then when I had the HKS scuck on mine.

[Dfer10]

get the ones they put on the saab viggens. they stock push 15+ psi

[gear whine]

http://www.ttstuff.com/images/forge/FMDV007P-BK_540.jpg


so this is a forge 007 diverter valve?

im going to need to get one then, mrbill was right, i should of listened to him like 6 months ago.

[Mr.Borrie]

Looking good jacob not as pretty as my Rice dumpvalve installed with zipties but still nice :)

[volvero]

Has anyone tried this ebay one:

http://cgi.ebay.com/ebaymotors/_Car-...=p4506.c0.m245

[volvero]

Has anyone tried this ebay one:

http://cgi.ebay.com/ebaymotors/_Car-...=p4506.c0.m245

I've tried this knock off a couple of day ago and it works great, no vac leaks, no surge, definitively better than the stock worn out Pierburg CBV. For half the price of a Forge unit....

[BDKR]

I've tried this knock off a couple of day ago and it works great, no vac leaks, no surge, definitively better than the stock worn out Pierburg CBV. For half the price of a Forge unit....

Thanx for the 411. :)