Kayser Dv

[VagOrBust]

That because its a Bosch part number not a VAG one mate, go to a Bosch dealer to get one.

Hello, I hope I'm not to late to tell you: Stay away from the Kayser valve.
As I've said I've bought one for my S6, but it made a horrible fluttering noise with the boost partially coming on. It does this at 0,8 bar pressure and that's a value I get a lot in my chipped UrS6. IMO the spring is to weak. I've recently replaced mine with a Bosch adjustable one after 3 months of owning it and I'm very happy with the new Bosch valve. I've set it very sharply and the response is very fast, but without turbo fluttering. If I let go of the throttle it vents, if I so much as touch the throttle it closes, fully. No leaks, no more honking noise. I got mine from the states, link to one from the UK (don't know the seller though):
http://www.ebay.co.uk/itm/Bosch-Turb...item35ccb7941a

[bilko0795]

I wonder if this is the problem I am having at the moment with loss of power the car is only boosting to 0.9 bar with homefry and 0.6 with oem ecu.

[prj]

I have two of these on my RS4 and no issues. The spring rate is pretty much exactly the same as the Bosch one.

I've recently replaced mine with a Bosch adjustable one

The valve you linked has no connection to Bosch whatsoever. Bosch does not make "adjustable valves" either.

[VagOrBust]

I have two of these on my RS4 and no issues. The spring rate is pretty much exactly the same as the Bosch one.


The valve you linked has no connection to Bosch whatsoever. Bosch does not make "adjustable valves" either.

I may have been mislead by the title of the add. Tbh, it didn't say Bosch on the valve itself, nor on the package, which I found strange.
The valve itself however works fine for me. We'll see how it lasts. I've got it on my S6, which is my daily driver, so it sees plenty of miles weekly.
I do stand by my post on the Kayser though. I bought that one from my local Audi dealer and it was crap. Maybe I just got a bad one.