Wants turbo chatter on mk2 FR

[karlw]

I know.
Although i must admit I had the pigeon mod on my S14a but it was only doing it when that wasnt enough pressure to open the BOV so was very low plus it was a rebulit norris designs hybrid with nice strong blades
It did pop & bang nicely too you have to admit

 

[cheungy]

Right the only way to increase the "chatter" sfx... is a Remap and a CAI to amp it the spacer will just provide the "woosh".

Hope this helps. (your FR, would have the KO3 turbo located just under your engine. (quite a to get too)

edit:- Is your FR modded at all or just standard you forgot to add that to your question

 

[Poverty]

There are two fluttering/chattery noises theese cars make. One is whilst on boost which is the n75 valve stabilising, the other is on lift off. If it's the fluttering chattery noise on lift off you desire all you need is a forge spacer. The car will then give the noises you desire on certain load conditions. Rag the car to the red line and it won't make the noise, do a pull from low rpm however and then let off the accelerator just as boost peaks around 5000rpm or so and it will flutter like a goodun. I might have a forge spacer for sale if you are interested

 

[FR_Flavoured]

here we go again....

The noise you are refering to is call turbo/compressor stall or surge. you get this when either you have no recirc/BOV fitted like a WRC car or you have one fitted and its set too hard.

The noise is excess boost backing up when you lift off the throttle and the throttle plat shuts, at this point the flutter or chatter is the air being forced backwards through the turbo blades causing them to slow. this is the chatter noise.

sounds nice, turbos dont like it tho.

Exactly! I got this with my Renault 5 GT Turbo big time, with no dump valve fitted.

The excess boost usually escaped out the DV under normal circumstances.
Remove the DV, and instead, you get the "wastegate chatter", circulating back through the system - its actually contributing to your Turbocharger stalling - long term, this is bad news!

The sound of the DV or wastegate chatter is so 80's, we dont want to hear all that again, walking down the street. lol. Sounds like the car has a COLD !

 

[karlw]

Exactly! I got this with my Renault 5 GT Turbo big time, with no dump valve fitted.

The excess boost usually escaped out the DV under normal circumstances.
Remove the DV, and instead, you get the "wastegate chatter", circulating back through the system - its actually contributing to your Turbocharger stalling - long term, this is bad news!

The sound of the DV or wastegate chatter is so 80's, we dont want to hear all that again, walking down the street. lol. Sounds like the car has a COLD !

So... ALot of us know about this and give out advice yet people still want to put BOVs on their cars. Obviously their pockets are deeper than mine

 

[Poverty]

So... ALot of us know about this and give out advice yet people still want to put BOVs on their cars. Obviously their pockets are deeper than mine

The car will make the same noises without a forge spacer, the sound is only louder because of the holes

 

[Chris4125]

here we go again....

Right, wastegates dont chatter, flutter, or make any other WRC style noises.

They are either open or closed. they do not chatter.

The wastegate is there to control the boost level, once the turbo hits actuator pressure, this pushes the actuator open thus open the wastegate to maintain a stable boost, once boost drops below the set level of the actuator, it closes and starts all over again.

The noise you are refering to is call turbo/compressor stall or surge. you get this when either you have no recirc/BOV fitted like a WRC car or you have one fitted and its set too hard.

The noise is excess boost backing up when you lift off the throttle and the throttle plat shuts, at this point the flutter or chatter is the air being forced backwards through the turbo blades causing them to slow. this is the chatter noise.

sounds nice, turbos dont like it tho.

so what would be the best DV to get then? You seem to be the person to talk to!

 

[karlw]

so what would be the best DV to get then? You seem to be the person to talk to!

I rekon He will say not to and to get a Forge Re-circ and a re-map then remove the sound deadening so you can here the "flutter" more

 

[Knight_Rider]

Well here's the intake I have fitted, that should cater for you needs

http://www.youtube.com/watch?v=DQk3xi-lDs0&feature=related

 

[FR_Flavoured]

I rekon He will say not to and to get a Forge Re-circ and a re-map then remove the sound deadening so you can here the "flutter" more

I know you are only speculating, however... It sounds pretty sad doesn't it? going to the lengths of removing sound deadening from the engine bay + remap and more, just to please yourself in hearing some engine flutter ! Alot of effort and money for a cheap thrill.

 

[TubbyTwo]

so what would be the best DV to get then? You seem to be the person to talk to!

At the end of the day mate its up to you.

i cant speak about the new Leons, but if they are anything like the Mk1 Cupra R i have it will be so stupidly overloaded with sound proofing you wont hear much anyways. Seems to be a German/VAG thing to design a good looking car this fill it with loads of heavy stuff.

 

[Knight_Rider]

Yeah, I took by bonnet proofing and deadening offand my intake makes more noise outside but they're pretty well insulated inside. The noise I hear from the cabin must travel from the engine bay and through the left air vents.
It's the only way you can recreate the noise if you want it. I got mine and didn't even know you could make it till i floored lit let off then blipped it.

 

[Knight_Rider]

OR even though your engine isn't designed for it an atmosphering Dump Valve...

http://www.youtube.com/watch?v=jeTaOV__ofk&feature=related

 

[Chris4125]

Right the only way to increase the "chatter" sfx... is a Remap and a CAI to amp it the spacer will just provide the "woosh".

Hope this helps. (your FR, would have the KO3 turbo located just under your engine. (quite a to get too)

edit:- Is your FR modded at all or just standard you forgot to add that to your question

it has bodykit and a pipercross thats all.

 

[owen lcr]

open cone filter is the best way to get alot of noise mate...

 

[lesinge2k]

There are two fluttering/chattery noises theese cars make. One is whilst on boost which is the n75 valve stabilising, the other is on lift off. If it's the fluttering chattery noise on lift off you desire all you need is a forge spacer. The car will then give the noises you desire on certain load conditions. Rag the car to the red line and it won't make the noise, do a pull from low rpm however and then let off the accelerator just as boost peaks around 5000rpm or so and it will flutter like a goodun. I might have a forge spacer for sale if you are interested

Is it normal for the car to chatter under load? Or does it mean there is a problem with the N75 valve?

 

[densil]

Right I am baffled by this lot.

So, is a CAI bad for your vehicle. My car has a REVO remap, a CAI and the forge atmospheric valve. And I get the chatter noise when after accelerating from low revs (and as previously discussed) letting off at 5,000rpm or thereabouts. I understand that this occurs when you have a cone filter? But surely the same thing will be happening with the stock air filter. I mean whether stock or not the same air (and in my case pretty well the same mass of air) is getting through, so surely the same processes are occurring? Or is it just because you have a long metal pipe with a cone on the end that changes the acoustics and makes the noise more audible?

And with regards to the atmospheric valve, I understand that its not doing harm because the way the valve works is that the size of the holes makes the hiss more audible? Although i don't understand this explanation because I thought when stock all of the air would be recirculated. If thats the case, I would have thought it would be running rich because the car would "think" that all the recirulated air would be present, although this would not be the case.

Excuse my ignorance but basically, I am seriously thinking of putting everything back to stock, as I am worried that I am doing my vehicle damage.

If anyone could enlighten me I would be very thankful

 

[Poverty]

Is it normal for the car to chatter under load? Or does it mean there is a problem with the N75 valve?

normal, they all do it with the increased boost and airflow

 

[wjohnson]

Right I am baffled by this lot.

So, is a CAI bad for your vehicle. My car has a REVO remap, a CAI and the forge atmospheric valve. And I get the chatter noise when after accelerating from low revs (and as previously discussed) letting off at 5,000rpm or thereabouts. I understand that this occurs when you have a cone filter? But surely the same thing will be happening with the stock air filter. I mean whether stock or not the same air (and in my case pretty well the same mass of air) is getting through, so surely the same processes are occurring? Or is it just because you have a long metal pipe with a cone on the end that changes the acoustics and makes the noise more audible?

And with regards to the atmospheric valve, I understand that its not doing harm because the way the valve works is that the size of the holes makes the hiss more audible? Although i don't understand this explanation because I thought when stock all of the air would be recirculated. If thats the case, I would have thought it would be running rich because the car would "think" that all the recirulated air would be present, although this would not be the case.

Excuse my ignorance but basically, I am seriously thinking of putting everything back to stock, as I am worried that I am doing my vehicle damage.

If anyone could enlighten me I would be very thankful

One thing I know from working with several makes of intakes CAI and SRI is you will pick up a lot of resonance with a CAI pipe due to the piping length. This will exaggerate the induction noises from your engine. So yes it will probably still chatter with a stock filter but it may sound louder and more pronounced with a longer piped CAI.

 

[densil]

Thanks wjohnson, I was wondering if anyone has other ideas regarding my concerns in post #37

Many thanks