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Porsche/Audi Diverter Valve

Homer

Homer

OEMplus++
300+ Club
Joined
Aug 7, 2003
Location
San Francisco
Installed a few weeks ago, I finally took some pics. Shifts are amazing, idle is so solid. I don't miss my BOV.
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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.
 
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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
 
bypass valve

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.
 
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.
 
cbv

Homer said:
No. I know I want the faster diaphragm type.
I was asking what psi dave's failed at.
Click to expand...

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.
 
MrBill said:
forge 007>>>>>>>710n, or whatever yours it

They're good for like infinity psi. no failures!
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Based on budget and current setup, the 710n best suited me. If I was running higher psi, forge is where its at.
dl242gt said:
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.
Click to expand...

Good to hear.
 
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.
 
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
 
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