dumpvalve chatter/pssshhhhhh lol

[turbo.jon]

Had a quick look with search button cant find nohing my 99agu since fitting pipercross cone filter chatters like mad now everyone say its bad for the turbo so the std black valve is fooked i had an old twin piston dump valve in me shed from one of me old cars i have fitted this to the metal intercooler pipe and blocked up the other hole.i now get chatter followed by psssshhhhhh is this right as thought it would stop the chatter as thought it was only doing it due to faulty valve??? or is it because i have cone filter on any ideas please??

cheers

jon

[G60GTI16V]

maybe your dump valve is a bit dry or seized, im guessing you have a piped it from dv to inlet manifold

[Wazzzer]

don't forget the recirc valve doesn't let all the charge air back through, only a bit so you will still get some chatter. I get it on my remapped AGU 

[jonnyturbo]

Cant beat a lil chatter IMO

[james2]

if you get it remapped and use the dump valve it wont chatter...your standard engine (9 psi)wont work right on the dump valve you need more psi 

[m1tchh]

I got an AUM and it's got quite a lot of chatter and can make like a rasberry sound when holding at the right rev range when accelerating. Anyone know what it might be? It's got the standard recirv valve with a K&N induction kit. (I don't mind the chatter but my mate said it's not right)

Cheers.

[techno-len]

i had the chatter noise on mine when i had a faulty dv n me mate reckoned that it was charge air rushin back past the blades in the turbo so i binned the dv n blanked it off while i wated for a 007p to arrive now look at the sh!t im in fix the chatter asap from my experience

[Wazzzer]

completely misread your post. Get the standard DV or a Forge/R-Tech item back on there mate

[BaV]

Had a quick look with search button cant find nohing my 99agu since fitting pipercross cone filter chatters like mad now everyone say its bad for the turbo so the std black valve is fooked i had an old twin piston dump valve in me shed from one of me old cars i have fitted this to the metal intercooler pipe and blocked up the other hole.i now get chatter followed by psssshhhhhh is this right as thought it would stop the chatter as thought it was only doing it due to faulty valve??? or is it because i have cone filter on any ideas please??

cheers

jon

Hi mate, you need to remove your Dump valve from the metal intercooler pipe (you dont want your dump valve here as it is after the turbo) , block that hole up.  And put it onto the other hole that you originally blocked up (before the turbo). 

That will allow the Dump valve to do what you want it to do, you shouldnt get any chatter and its better for the turbo.  Could loose some performance though and could also throw up an engine management light. 

Best thing to do is when you can afford it buy an uprated diverter valve like a forge 007p and put that on the car exactly how the standard one was.

[Wazzzer]

edit, thinking about it that should be the same but you still need to get a recirc valve back on there