At 33 seconds how do they get the DV to sound like that?  I love it.

 

http://www.youtube.com/watch?v=cjqz1KK0T3Q

sounds more like a flutter haha! isn't that when the boost goes backwards into the turbo when it has nowhere to go?

Isn't the compressor stall noise ??

 

 

Like air going backwards over the turbo or something like that, IIRC it's not good in the long term 

I want mine to sound like the gumpert apollo on lift off.... sounds insane

Compressor stall is NOT good even if it sounds wicked 

U get the chatter if u dare blank the diverter valve off :(

Eeek

U get the chatter if u dare blank the diverter valve off :(

Eeek

what like i have

i have a feeling it's been done to my car, as every now and then a get the flutter noise, it does sound cool but like it's been said, it's pretty bad for the turbo!

how do i go about checking if this is the case?

cheers

i have a feeling it's been done to my car, as every now and then a get the flutter noise, it does sound cool but like it's been said, it's pretty bad for the turbo!

how do i go about checking if this is the case?

cheers

 

 

You may get a slight effort of the noise, mine's been doing for the 8 years I've had the car, turbo still in one piece 

oh well, 7 more years to catch up to you then haha! been exactly one year since i bought her!

i should start worrying less haha, i get worried over any noise/lights coming up in dash!! :P

Cool.  I might try blanking the diverter valve off then see if I can get the noise. 

Just to note.

I've never blanked anything off to get that noise.

It only does it in 3rd going uphills, its almost unnoticeable

Cool.  I might try blanking the diverter valve off then see if I can get the noise. 

 

Bad choice buddy, I would not do it.

 

You are missreading David 8 .

 

He meant that he just get the odd flutter like i do every now and then which depends on load and driving and throttle position and nothing to do with blanking or removing the DV.

 

That is a crazy idea...

I get it when I let off very quickly sometimes.

I reckon if you really wanted the noise you could try putting a stiffer spring in the DV, that should make it lazier to open and more likely to make that noise. 

Do not blank off the DV, if you're lucky you'll blow off a boost pipe, it is there for a very valid reason.

 

On a sidenote, those real WRCs are quite something. Imagine they released them    

I reckon if you really wanted the noise you could try putting a stiffer spring in the DV, that should make it lazier to open and more likely to make that noise. 

Do not blank off the DV, if you're lucky you'll blow off a boost pipe, it is there for a very valid reason.

 

On a sidenote, those real WRCs are quite something. Imagine they released them    

 

As stated it is not good to get that noise as every time that noise is heard is the compressor stalling.

 

Without a Dump Valve, the pressurised air being pumped into the engine by the turbo will have only one path when the throttle is closed,

which is back through the turbo compressor.

The fluttering sound is the sound of this air against the blades of the spinning turbo compressor as it tries to flow through it the wrong way.

 

Car manufacturers fit recirculating Dump Valves to give the pressurised air an alternate path when the throttle is closed,

which is back into the turbo compressor inlet. 

 

The issue in question is that the load placed on the turbocharger from this pressurised air flowing through it the wrong way can cause premature wear or damage,

as this air is causing a potential sudden staling of the turbo. In higher boost levels without a Dump Valve are definitely not going to help turbo life.

 

I also recon fitting a stronger spring is also not the best thing to do to bring on a sound that is actually not a good thing.

 

on a side note too,  those WRC are epic...

lol love it! you can just pull the vac hose for a quick flutter. ive blanked it off as love the sound the car runs and boosts as it did.

 

mate of mine is running his s13 280bhp at 16-17psi with no dv 60k on its turbo, that car left the factory with NO DV as did a fair few  cars. so they cant be that important can they?

 

turbo will die of something else long before the flutter kills it

 

has any one ever actually seen a failed turbo diagnosed with flutter the cause??

 

seems to be a vag mind set  that you require one all the jap boys ive spoke to find it highly amusing.

 

i did read something a while back that they are in place to prevent the flutter sound as you wouldnt want a brand new car chattering away would you lol

 

so ill continue dv less will take it to stage 2 so we can all see the outcome

http://www.youtube.com/watch?v=ieVDfnUKN9s#t=0

lol love it! you can just pull the vac hose for a quick flutter. ive blanked it off as love the sound the car runs and boosts as it did.

 

mate of mine is running his s13 280bhp at 16-17psi with no dv 60k on its turbo, that car left the factory with NO DV as did a fair few  cars. so they cant be that important can they?

 

turbo will die of something else long before the flutter kills it

 

has any one ever actually seen a failed turbo diagnosed with flutter the cause??

 

seems to be a vag mind set  that you require one all the jap boys ive spoke to find it highly amusing.

 

i did read something a while back that they are in place to prevent the flutter sound as you wouldnt want a brand new car chattering away would you lol

 

so ill continue dv less will take it to stage 2 so we can all see the outcome

 

Whilst I can't argue with you ref actual experience of turbo failures for the reason of DV fluttering the point is as you mentioned the jap cars in question left factory with no DV perhaps because their set up is different to the VAG group and manufacture that do put DV on and other factors i am not that techi with..

 

Just because one car runs without does not mean that is the same for every car.

 

And you are probably right by the time the fluttering does something to damage the turbo the car is long gone.

 

each to their own buddy.

 

I stick with mine on...

Whilst I can't argue with you ref actual experience of turbo failures for the reason of DV fluttering the point is as you mentioned the jap cars in question left factory with no DV perhaps because their set up is different to the VAG group and manufacture that do put DV on and other factors i am not that techi with..

 

Just because one car runs without does not mean that is the same for every car.

 

And you are probably right by the time the fluttering does something to damage the turbo the car is long gone.

 

each to their own buddy.

 

I stick with mine on...

i guess it comes down to the turbos themselves that vary, im still on the fence tbh but im going to try it and see what the outcome is

 

no real harm done if it goes bang gotta upgrade to ko3 s anyway

@Bowders1

I wasn't trying to say it was a good thing. It can't really be good in my opinion. Extra noise = extra vibrations and when those vibrations are coming from something spinning at x RPM, I'd rather keep them to a minimum.  :wonder:

It's not really up my street but, I can't see anyone getting instant turbo failure from doing it; so if it's the sort of thing that puts a big smile on your face, lifes too short to give a ****.

Ok I`ve been doing a bit more reading up and apparently that iconic rally sound is a 'noisy' more advanced waste gate.  From what I`ve been reading some of the cars that actually produce that sound, including rally tuned cars don`t have a DV at all.  I`m not sure of the benefits of removing the DV but it seems to benefit highly tuned rally and race cars when the DV is not present.

Edited 11 March, 201412 yr by sammyhale30

@Bowders1

I wasn't trying to say it was a good thing. It can't really be good in my opinion. Extra noise = extra vibrations and when those vibrations are coming from something spinning at x RPM, I'd rather keep them to a minimum.  :wonder:

It's not really up my street but, I can't see anyone getting instant turbo failure from doing it; so if it's the sort of thing that puts a big smile on your face, lifes too short to give a ****.

 

I hear ya....  

Ok I`ve been doing a bit more reading up and apparently that iconic rally sound is a 'noisy' more advanced waste gate.  From what I`ve been reading some of the cars that actually produce that sound, including rally tuned cars don`t have a DV at all.  I`m not sure of the benefits of removing the DV but it seems to benefit highly tuned rally and race cars when the DV is not present.

 

Those rally cars are tuned specifically in a way to get the best performance from a highly tuned car. The turbo and wastegates and air/fuel mixtures and temps will have a expensive control unit (multiple ECU's) managing all this stuff rather than a bog std manufacture ECU. So not surprising a DV is not used.

 

It is kinda pointless comparing the set up of a rally car to what you want to get in a road car imo. 

Im sure the likes of nissan and subaru invested millions into research for there reasons not to use a DV

Im also sure that vw/audi did the same for theres reasons to use one.

My car came with one so i will leave it on. Plus my turbo has done 130k now its probably worn enough lol

Can I just say I took the vac pipe off mine to see what it sounds like..... fricking insane. Worth a go if you're a big kid like me and then reconnect it back up