Tank Mike

how do you make a turbo car chatter. is it really as simple as taking off the dump vavle.

surly you must have to do something. am i asking an ovious question

thanks

mike

Oranoco

What car? What management?

Some car s like the small turbo Escort Cossie and the Focus RS really should be run with a DV. Large turbo Cossie and RST's can have them filed in the bin until you fit T4 turbo or exceed 30psi of boost

Tank Mike

some one i know said that any turbo car, as long as you have a k&n air filter or something like it and you don't have a dump valve the wastegate will chatter. i just find it hard to belive.

how would you do it on a cossie with standard management

Physio

Dont let Mike Rainbird hear you call it wastegate chatter he'll go off on one

Tank Mike

whats it better known as then

Oranoco

A little bit more to it than that mate. If the car runs an air flow meter like on a S2 RST it will muffle all the sound.

The noise that you hear actually has fook all to do with the wastegate it's the sound of the compressed air having nowhere to go with the throttle shut so it goes backwards through the turbo.

Tank Mike

arrr begining to understand. so with something like a cossie it would prittly much be that symple but with something running a metering head because its in the way you wouldn't really hear it.

just been trying to get my head round it for some time

Oranoco

Small turbo Escort Cossie's will do it as well but I think it has an air flow sensor or something that gets upset when the DV is removed as it can't work out which way the air is passing over it. I might be wrong though but sure I've heard it mentioned a few times.

Tank Mike

thanks for that mate. is cleared a bit of a mist moment i was having.

Oranoco

Knowing what my explanations are like though I've probably created more mist as well

Dicko&Vacant

iTrader: (3)

it sounds fookin awesome though, even old ppl turn round when i change gear

Davie

Is it not better known as 'Compresser Stall'? Like what was siaid above, it's when the air is forced the wrong way and momentarily stops the compresser wheel?

Also, i think a more reasonable term to explain a wastegate is that it is there to regulate the boost?

open to correction!

vroooom ptssssh

No need for correction their davie

GOT2BZETEC

CAn u get my gt tdi golf to do it????

morto

waste gate chatter can still chatter with a d/v on.. mine does

andy

GOT2BZETEC

Lucky git!

AlexF

then your DV isnt working lol

Alex

Stu.H

my cossie did both when running a dv

AlexF

not saying it doesn't

But the DV is pointless if your hearing the turbo surge.

Alex

big_wig_074

boXXer

friends astra does both.

Rs1

iTrader: (1)

You will here both if the dv can't bypass enough air. As above said,defeats the point of the dv.

@got2bzetec,iirc you'll have a hard time getting your gttdi to stall as they dont have a throttle butterfly to stop the air and push it back over. In high load(full boost)low rpm and lifting of the throttle you may get a small amount of stall as the engine can't physicly swallow the air being forced through the pipes. Its easy to hear with an induction kit.

slamminviynal

does this chater noise do any damage to the turbo? mine has alway been realy loud and have been told i need a new turbo. it does sound great but would a dump valve protect the turbo?

big_wig_074

utter bollocks,keep up the good work!

boXXer

so they say, but loads of people dont run DV's and dont get any probs. Only bigger turbos like T4's etc suffer from damage i think....

Turbo Zetec

iTrader: (1)

you sure on this? as many new diesels DO actually have a throttle butterfly

boXXer

ive heard stock diesel golfs chatter past me, not that loud though.

Rs1

iTrader: (1)

Can't remember seeing one but its been ages since ive worked on one,i'm not 100%

Shell

Its been explained that many times on here Stu might aswell make it a sticky for all to see...

AlexF

They do... but its for shut down to lessen engine shake!

Alex

GOT2BZETEC

Lol it like makes a tiny pheww noise when i let of, hmm not sure bout induction kit i think it might sound a bit crap

COSSIE CAL

what it is a twin piston dump valve or blow-off valve.a single piston makes a simple tish and a twin piston makes a chatter,ive had loads of different dump valves and thats what i think it is.


a single is like a bailey dv24 and a twin piston is like the new venturi d/v,a blow-off valve is like a twin but are mostly for japenese cars.i had a HKSssqv and that was mint but now have a venturi by bailey.

COSSIE CAL

boxxer your right only t4s etc. get damaged wih a d/v and t2,t3/t34-35's are easily caplable to live longer because the shafts and turbines are smaller.