in the last days i had install my fmic kit...

i also had musted installed a new open dump valve .

now when the turbo starts spooling i hear a very loud jiauuuuu sound.... is it normally or is a a wrong setting of the dump valve?

 

what i had forgot... the boost level is still the same ... overboost to around 1,0 bar ... than reduce and stay at 0,8 bar!

 

hmmm nobody can help me?

this sound what i have.. comes out of the airfilter! is it possible that this is from the egr ?

by the bov i have increase the spring rate to the max!

the bov doesnt works now... but the loud jiaaaaaaaaaaaau sound when the turbo spool i still have... and when i go away from the gas pedal i hear a sound like a close BOV what breathing out of the airfilter little bit....

hmmm ... who can help me?

the car is really noisy now... everyone is looking when i drive... thats not what i want

 

it will be induction noise because you now have an induction kit,mine does it and there is nothing you can do to stop it.
you will also hear the wastegate chattering to control boost levels more now the standard air box is gone

 

the stock airbox was gone in before too!

i had the chattering noise when go away from the gas pedal....

but now i also have a loud turbine noise... like a jet turbine is starting... my boost level was in before 0,8 bar stock... now its hold by 0,9 bar.... but when the boost starts come around 2400 rpm than is the loud turbine noise... maybe sounds cool... but its a lil bit tooooo loud for German Streets

 

Where in Germany are you?

 

I've got this too (fmic, open filter and td05-20g). Sounds like a jet engine in third gear onwards

 

Normal sound, just slight surging of turbo as it exhaust pressure starts spooling it up trying to overcome charge air pressure which wants to stop the turbo from turning. Normally you can hear this when you first hit the throtle and when you come off throttle as drive to turbo is reduced allowing unit to start stalling.
Easier to hear when you have an induction kit, but does this also when you have OEM induction you just dont hear it as much.
Hope this helps

 

@scoobysmiff

i am located in northern germany... HB / CUX Area

 

seems like i am not far(ish) from you, i'm in Bad Fallingbostel, 29683, PM me for a chat dude

 

classic signs of a boost leak somewhere.

 

check all hoses are tight, use decent hose clamps, also spray hairspray on the silicone hoses before you fit them, this will basically glue the silicone hose to the metal pipework (easily removed though)

 

when i back at home i will check all hose clamps with a leaksearch spray what i have at home.... i also want to change the locating of the bov near the turbo outlet... and i hope than it will stop with the turbo stalling / chattering and the bov will again breaths out and not throw the airfilter

 

the noise when you come off the throttle is the turbo blades stalling (not wastegate chatter - some rally comentator has a lot to answer for).
Depending on what turbo you are running this is going to cause damage to the blades or not, if you loosen the dump valve spring it should reduce etc..

Simon