So after researching the honking noise I am experiencing when light - medium accelerating from stop, I'm pretty sure my problem lies with the diverter valves.

I notice that my boost gauge hits about 0.7bar a WOT but quickly backs off and hovers around 0.5bar. As it shifts through gears it never hits 0.7bar again other than when launching in 2nd gear.

I also notice that during hard acceleration there seems to be a slight hesitation - very minimal but once you tune into it, you can easily notice it.

Can anyone confirm if they experienced similar symptoms when the DV's went?

Also, whats the consensus on the best replacement DV's? WHats the best bang for hte buck? Audi TT plastic OE's or some billet aftermarket ones? I was contemplating ordering the billet ones offered by Suncoast....

 

So finally whats the exact factor you found?

 

I just replaced mine a few days ago. Similar boost issues, hesitation and rough acceleration.

I used the APR valves because they are an upgraded diaphragm version of the stock type valve. (order with the blue springs).

These are in a ***** of a location in the CTT so I did not want to have to maintain them they way normal piston style valves need to be oiled occasionally. (not located right on top of the motor like your 2.7t audi)

Boost is strong and smooth now. Made a noticeable differnce.

 

Just replaced mine yesterday. Wasnt sure if my stock were bad but I figured they with the tune it wouldnt hurt.

 

Hi smalone01, i notice you're in the atl. I live in Gwinnett, i'm in the early stages of modding mine, would like to meet fellow cayenne owners if you're interested.

i can't pm yet because of my post count but if you pm me i will respond with my #

Thanks,

Kevin