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Author Topic: turbo chatter since n249 bypass??  (Read 6544 times)

Offline rfn_hodgson

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turbo chatter since n249 bypass??
« on: 19 August 2013, 20:22 »
hello fellas ive just done the n249 bypass and when i release off the trottle i get the chatter and not a clean pssst if you know what i mean i have got the forge 007p


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Offline davemk4

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Re: turbo chatter since n249 bypass??
« Reply #1 on: 19 August 2013, 20:46 »
Have the fitted the 1 way valve right way round?
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline Nino

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Re: turbo chatter since n249 bypass??
« Reply #2 on: 19 August 2013, 20:53 »
mine done the exact same thing, I was told unless it sounds as bad as this......
http://www.youtube.com/watch?v=O83h9a_K3GY
then its nothing to worry about  :cool:
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Offline Screech16v

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Re: turbo chatter since n249 bypass??
« Reply #3 on: 19 August 2013, 22:26 »
Mine sounded exactly like this until I replaced my broken standard dv.
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Offline rfn_hodgson

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Re: turbo chatter since n249 bypass??
« Reply #4 on: 20 August 2013, 06:55 »
Quote from: Nino on 19 August 2013, 20:53
mine done the exact same thing, I was told unless it sounds as bad as this......
http://www.youtube.com/watch?v=O83h9a_K3GY
then its nothing to worry about  :cool:

omg it does sound like this!!!!
what is the damage im doing to my turbo??
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Offline Nino

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Re: turbo chatter since n249 bypass??
« Reply #5 on: 20 August 2013, 07:15 »
Well the sound is the air going back thru the turbo and stalling it. The research I did suggested this could brake the turbo over time.
* what DV you got?
* what spring?
* do you have it reversed?
* if you got the 007p does it have the upgraded piston?
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Offline davemk4

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Re: turbo chatter since n249 bypass??
« Reply #6 on: 20 August 2013, 09:48 »
The tone of my dv changed after bypass more chatter/flutter sound but nothing like that video lol
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline rfn_hodgson

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Re: turbo chatter since n249 bypass??
« Reply #7 on: 20 August 2013, 10:13 »
Quote from: Nino on 20 August 2013, 07:15
Well the sound is the air going back thru the turbo and stalling it. The research I did suggested this could brake the turbo over time.
* what DV you got?
* what spring?
* do you have it reversed?
* if you got the 007p does it have the upgraded piston?
I've got the 007p with yellow spring and its the right way round
And how do I know if I've got the updated piston??
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Offline Nino

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Re: turbo chatter since n249 bypass??
« Reply #8 on: 20 August 2013, 11:42 »
the old one has a dent in the bottom where as the new one is flat and the new one has a rubber seal onit
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Offline sharki786

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Re: turbo chatter since n249 bypass??
« Reply #9 on: 20 August 2013, 12:48 »
Does the spring go 1 way or are you on about the actual dv?


Thats the revised piston
« Last Edit: 20 August 2013, 12:50 by sharki786 »
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