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Thread: DV noise??

  
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    MonkeeBoy's Avatar
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    DV noise??

    I'm kind of confused, i've searched the forums for this but is this sound normal??

    two videos of it as i wasn't 100% sure if you can hear it properly, i made like 5 different videos all of which can't be heard (because it was from my phone lol) and these are the only 2 where you can hear it




    The engine is standard, apart from the viper which it on there, and madmonkee said i might possibly have a vxr turbo.....but not100% sure.

    but anyway back on topic is this dump valve noise normal? it holds boost really well still and doesn't seem to be any leaks anywhere. and i don't have a dump valve on there.

    Heard it's called waste gate chatter... and can't seem to get a straight answer what it is lol.

    and if it is wastegate chatter, again can't see to get a straight answer if it's healthy or not (myth or not ect....)
    >>Diary<< Status: ...........Slow and Steady.... may update more often...
    Last Updated: 27/10/2014

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    waste gate chatter isnt good, its the turbo stalling th blades, when the boost stops being taken into the engine (when you let off) it has to go somewhere, either by means of an atmospheric DV (forge/baileys etc) or a re-circulating type that puts it back into the inlet. so without one, it "can" cause greater wear on the turbo....

    you will notice a louder noise aswell if you have an open cone induction kit, it also gets even louder if you remove the cross-over pipework and go straight from turbo to maf to air filter
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    i always thought that the zlet had a oe recirculating dv anyway didn't it?
    >>Diary<< Status: ...........Slow and Steady.... may update more often...
    Last Updated: 27/10/2014

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    yes it does... but you can still sometimes hear the spool and chatter through the filter....
    No longer GSi power
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    so bassically what's happening atm is that it's still bad and causing extra wear on my turbo? or is that relativly normal?
    >>Diary<< Status: ...........Slow and Steady.... may update more often...
    Last Updated: 27/10/2014

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    Check the vac pipe from the oe recirc valve on the turbo to the rear bcs, it may have popped off at the back, Also check for leaks in the pipe if it all connected.
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    I have got the same issue. Fitted my Baileys dump valve earlier and it makes this "wastegate chatter". I have a cone filter but didnt hear this noise before i put the baileys on. I havent blocked off the OE dump valve, if i did would this noise stop?

    Also the pshhhh noise is very short and not quite what i was expecting, sounds ok if im in neutral n pressing accelerator but doesnt sound same when im driving along? Is that just because im in car which is moving so i cant hear it? Or should i still hear a nice Pssssshhhhh from in car aswell?
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    You wont hear the baileys that well with the standard recirc still fitted and working.

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    Ok, well i think im guna attempt to block off oe one tomoz morning. I dont have a spacer block tho. Do you know where i can get on or sumthing i can improvise with?
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    One way valve from halfords does the job perfect

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