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Model specific boards => Golf mk5 => Topic started by: RTechUK on 25 October 2011, 20:05

Title: Anyone else having issues with the 'D' valves ?
Post by: RTechUK on 25 October 2011, 20:05

I have had a Mk5 2.0Tfsi in for a stage 2 custom remap since monday.

Maxed the load maps out and the N75DC at 95% and only managed 240bhp-300lbft. :ashamed:

It was found that the 8 month old 'D' revision was not holding the boost back, and allowing the boost to bleed of back into the compressor housing on the inlet side.  New DV fitted and making a healthy 267bhp-307lbft so far.. :happy2:  But still getting high DC from the N75,  but that my job for tomorrow and fingers corssed its not a cracked turbine housing or I have just maxed the turbo flow?

I thought these 'D' valves where the best version??  It seems the plastic neck has worn and is now allowing the boost to pass by the black seal ring.

Anyone else having issues with the 'D' ?

I thought I would  smoke test the old unit  and this is what I found.
Video
(http://i258.photobucket.com/albums/hh252/Rtechremaps/th_IMG_2139.jpg) (http://s258.photobucket.com/albums/hh252/Rtechremaps/?action=view&current=IMG_2139.mp4)

(http://i258.photobucket.com/albums/hh252/Rtechremaps/boostleak.png)

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: Hurdy on 30 October 2011, 11:06

This is the first one I've heard of and I've been around a bit.  :laugh:

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: RTechUK on 30 October 2011, 11:42

Quote from: Hurdy on 30 October 2011, 11:06

This is the first one I've heard of and I've been around a bit.  :laugh:

Fingers crossed its an one off, I have tested all 5 BNIB units we have in stock, And from now on I all be checking everyTFSI DV which comes in ot just the rubber versions.  The only way to test it is by getting my lips around it and blowing... :grin: I am bidding on a used K03 turbo on ebay so I can make a mock smoke/pressure test bed.

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: RTechUK on 01 November 2011, 16:59

We fitted a new D valve to a A3 Tfsi two weeks ago, while it was back in for mapping I thought I would test the new D valve, during logging we found the turbo having to work harder to make the stage 2 power compared to two weeks back.

(http://i258.photobucket.com/albums/hh252/Rtechremaps/th_IMG_2204.jpg) (http://s258.photobucket.com/albums/hh252/Rtechremaps/?action=view&current=IMG_2204.mp4)

(http://i258.photobucket.com/albums/hh252/Rtechremaps/th_IMG_2203.jpg) (http://s258.photobucket.com/albums/hh252/Rtechremaps/?action=view&current=IMG_2203.mp4)

 
I have some of the older G valves comming from Germany and should be here tomorrow, I know the G also has issues with the rubber splitting but I need to prove the D is leaking under load.

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: Wazzzer on 01 November 2011, 19:33

sounds like the 1.8T N75 valves all over again...

The E I got in replacement for that knackered one I had last time I came up to you leaked straight away, VW really need to be a better on their quality checks :angry:

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: AlanD on 03 November 2011, 12:46

I have a 'B' valve being used as a paper weight on my desk if you want that :D ;)

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: MaXXeH on 03 November 2011, 18:17

.. think i will order a forge one..  thanks nick i will waste more money  :cool:

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: RTechUK on 03 November 2011, 18:19

Quote from: AlanD on 03 November 2011, 12:46

I have a 'B' valve being used as a paper weight on my desk if you want that :D ;)

Is it still intact?  I would like to borrow it it poss?

 :wink:

Nick

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: RTechUK on 03 November 2011, 18:22

Quote from: MaXXeH on 03 November 2011, 18:17

.. think i will order a forge one..  thanks nick i will waste more money  :cool:

Cool I will fit that for you £FOC as long as I can us it to test with the K03 rig.  I can even order you one and supply at cost if needed.... :wink:


Nick

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: MaXXeH on 03 November 2011, 18:31

yea good for me mate, you order it :) i will drop the car of monday that ok?

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: RTechUK on 03 November 2011, 18:41

Quote from: MaXXeH on 03 November 2011, 18:31

yea good for me mate, you order it :) i will drop the car of monday that ok?

lol
 monday it is then

Title: Re: Anyone else having issues with the 'D' valves ?
Post by: MaXXeH on 03 November 2011, 19:01

cool, c u then mate.  :smiley: