how do i get that noise..........

[!3oost]

gday ppls im fairly new to the modding scene but im eager to learn as i just got my first r33 gtst and i been hearing this sound om otherturbo imports where u can hear the turbo make a kind if ch ch ch ch wind down noise....i reakon this noise sounds tuff but i have no idea how to get it...is it from an aftermarket BOV or sumthin else????? ne help is appreciated

[JezR31]

this noise i called compressor surge. Its caused by nt running a bov or blocking up the one you have.

it might eventually f*ck up your turbo. When the Throttle body closes the compressed air comes back and through the turbo. The compressor wheel the chops up the air.

Nissan put it there for a reason

[Mcboost]

this noise i called compressor surge. Its caused by nt running a bov or blocking up the one you have.

it might eventually f*ck up your turbo. When the Throttle body closes the compressed air comes back and through the turbo. The compressor wheel the chops up the air.

Nissan put it there for a reason

correct me if im wrong but i believe sequential bov's make that noise while still venting all that nasty pressure away from your turbo. thats the difference between a normal bov and a sequential, sequentials make that ch ch ch noise...

[ferni]

but most people just block of thier BOV ... good chance of killing your turbo

[Jimbo2000]

correct me if im wrong but i believe sequential bov's make that noise while still venting all that nasty pressure away from your turbo. thats the difference between a normal bov and a sequential, sequentials make that ch ch ch noise...

dunno bout sequential, but my super sequential does that. its normal and healthy.

[Guest INASNT]

gday ppls im fairly new to the modding scene but im eager to learn as i just got my first r33 gtst and i been hearing this sound om otherturbo imports where u can hear the turbo make a kind if ch ch ch ch wind down noise....i reakon this noise sounds tuff but i have no idea how to get it...is it from an aftermarket BOV or sumthin else????? ne help is appreciated

Sell ur car and buy a VL turbo if u want that sound

I had that sound when i got my new turbo setup and had no BOV's on. It sounds tuff but ***s ur turbo up, plus causes extra lag between gear changes coz the air going back around to the compressor slows down the blades during gear changes

[Mcboost]

Sell ur car and buy a VL turbo if u want that sound

I had that sound when i got my new turbo setup and had no BOV's on. It sounds tuff but ***s ur turbo up, plus causes extra lag between gear changes coz the air going back around to the compressor slows down the blades during gear changes

or just buy a sequential, a new turbo is a bit of an overkill

i have a arc bov sequential that makes the noise, and is as good for the turbo as a normal bov

[franks]

are neon lights coming after you get that ch ch ch sound??? :wassup:

[Guest INASNT]

or just buy a sequential, a new turbo is a bit of an overkill

i have a arc bov sequential that makes the noise, and is as good for the turbo as a normal bov

I never said to buy a new turbo.

And the sound any BOV makes is not the same as the sound the air makes when it gets chopped by blades spinning at over 80,000rpm.

[CerealKiller]

replace your stock airbox with a pod filter. You'll hear the ch ch ch sound easier without having to replace your BOV.

I did this and it sounds freaking mad when I take my foot off the gas slowly.

I've got an A'PEXi Power Intake (pod filter) and I've been told it's one of the loudest.

[TTT]

no bov makes that sound..

sequential bovs don't make a chu chu sound.

the only way to get that sound is with a bov that is too tight and not opening or with no bov.

It's so funny how many mis-informed people there are around..

[CerealKiller]

mate, I've got 2 BOVs hooked up at the moment (stock plumbback and Blitz SS) and I get the flutter sound. Explain that. Is my BOV on too tight? No, as I can still hear the air pass out through the Blitz BOV...

A pod filter makes a world of difference.

[Mcboost]

so whats the point of a sequential bov then?

[Guest INASNT]

mate, I've got 2 BOVs hooked up at the moment (stock plumbback and Blitz SS) and I get the flutter sound. Explain that. Is my BOV on too tight? No, as I can still hear the air pass out through the Blitz BOV...

A pod filter makes a world of difference.

The flutter sound is not the same as the DUT DUT DUT sound of air being sliced up by the comp blades

[CerealKiller]

if they're not the same sound then what is it?

[Guest INASNT]

A bov is just a release valve. The sound is of pressurised air being released by a valve.

[Mcboost]

as far as im aware, differenty bov and filter combo's will give different noises as not 100% of pressure is released through the bov on ANY bov, some will always go back to the turbo, the better the bov the less that will travel back. so in many cars you will still here a flutter, just depend on how much u hear will be determined by the bov and filter and turbo and boost psi... correct me if im worng this is my opinion only

[TTT]

have you noticed how sequential or twin chamber bovs have 2 vacuum lines?

this is to open the 2 pistons.

these are designed that way to have less chance of leakage under severe boost applications.

that is the only reason for sequential or twin chamber bovs.

it does not make any sort of sequential noise.

a bov that is working properly should make a single release sound and nothing else.

sure the volume and pitch may vary (comparing a turbo smart to a HKS SSQV's high pitched squeek noise), but it should only make a single release sound..

not multiple chu chu chu or other chopping sounds..

if you are hearing ANY noise from the air filter on a car with an ATMO venting bov, then the bov is not doing it's job properly.

any sort of fluttering or chopping sound is from the turbo chopping the air and can be heard from the air filter..

the flutter noise can also be different from car to car depending on a number of things..

size of turbo, the material used for the inlet pipe, the intercooler, the type of material used for cooler pipes, the length of these pipes...

ever hear a skyline with a stock cooler and blocked bov and pod... it is like a trrrrrr sound.. then same car with a new FMIC and larger and longer cooler pipes, the sound is completely different.. reason is that the pipes are of larger capacity and the air is forced out with less pressure and the fluttering sound is changed to a more deeper and slower flutter..

I hope this makes sense..

[Mcboost]

have you noticed how sequential or twin chamber bovs have 2 vacuum lines?

this is to open the 2 pistons.

these are designed that way to have less chance of leakage under severe boost applications.

that is the only reason for sequential or twin chamber bovs.

it does not make any sort of sequential noise.

a bov that is working properly should make a single release sound and nothing else.

sure the volume and pitch may vary (comparing a turbo smart to a HKS SSQV's high pitched squeek noise), but it should only make a single release sound..

not multiple chu chu chu or other chopping sounds..

if you are hearing ANY noise from the air filter on a car with an ATMO venting bov, then the bov is not doing it's job properly.

any sort of fluttering or chopping sound is from the turbo chopping the air and can be heard from the air filter..

the flutter noise can also be different from car to car depending on a number of things..

size of turbo, the material used for the inlet pipe, the intercooler, the type of material used for cooler pipes, the length of these pipes...

ever hear a skyline with a stock cooler and blocked bov and pod... it is like a trrrrrr sound.. then same car with a new FMIC and larger and longer cooler pipes, the sound is completely different.. reason is that the pipes are of larger capacity and the air is forced out with less pressure and the fluttering sound is changed to a more deeper and slower flutter..

I hope this makes sense..

damn i got a $600 bov on my r31 that flutters, time to get out the allen keys and loosen her up a bit i think

[Dynamix]

Could it possably be from a scatter valve bov..? Seeing they have multiple vents that release the pressure thats where the chu chu chu sound would be coming from.