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"stu Tu Tu"

KezR33

By KezR33,
in General Automotive Discussion

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KezR33 Veteran

KezR33

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What the hell is that noise? I've heard it twice now, both times from VLs. Is it some tricked out BoV?

If you ask me I think it sound ridiculous. My girlfriend was in hysterics for about 10min as we drove beside this thing.

Thanks.

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DRD-00F Grand Master

DRD-00F

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It's called 'dosing' in the VL world, also know as 'flutters', but around here it's best described as 'compressor surge'.

It's the sound of the air bouncing off the turbine blades when the butterfly to the intake plenum is closed. Normally all this pressurised air get's released by the Blow Off Valve, but if you don't have one, it does that.

Different length, shape and designs of pipes make different noises...

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(OO)SKYLINE(OO) Grand Master

(OO)SKYLINE(OO)

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It's either a HKS Super Sequential BOV or some cheap ass BOV or like what others have said compressor surge.

HKS Super Sequential BOV = Wank (Only useful on highly tuned cars that are running a lot of boost and the stock one cannot handle it any more)

Compressor Surge = Say goodbye to your turbo.

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KezR33 Veteran

KezR33

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It's either a HKS Super Sequential BOV or some cheap ass BOV or like what others have said compressor surge.

HKS Super Sequential BOV = Wank (Only useful on highly tuned cars that are running a lot of boost and the stock one cannot handle it any more)

Compressor Surge = Say goodbye to your turbo.

Is that the HKS SSQV BoV? I've been trying to convince a mate to buy one for his evo, but all the vids I've seen of it its a sharp, high pitched noise rather than the VL flutter.

Just curious, is "dosing" unique only to the VL, or is there a specific reason VL owners choose it?

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(OO)SKYLINE(OO) Grand Master

(OO)SKYLINE(OO)

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Is that the HKS SSQV BoV? I've been trying to convince a mate to buy one for his evo, but all the vids I've seen of it its a sharp, high pitched noise rather than the VL flutter.

Just curious, is "dosing" unique only to the VL, or is there a specific reason VL owners choose it?

Yeah either it's the HKS BOV or like others have said with the metal pipe.

Any turbo car can make the noise, it just depends on the BOV set up or whatever the owner does to it.

The stock BOV should not make any noise, at least no "Stu Tu Tu".

But if you put on an air pod, while still having your stock BOV, you will get a nice "Suction" noise then a "Choo" at the end (Only when on boost).

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Benzino33 Experienced

Benzino33

Posted
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What the hell is that noise? I've heard it twice now, both times from VLs. Is it some tricked out BoV?

If you ask me I think it sound ridiculous. My girlfriend was in hysterics for about 10min as we drove beside this thing.

Thanks.

LOL! just search "VL turbo dose" on youtube,,theres thousands of videos on that stuff,,apparently they're a favourite with wog guys and their significant others

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funkymonkey Grand Master

funkymonkey

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my ceffy doses like an athlete on the roids, but it comes from factory with no recirculation valve, and still runs stock boost on a stock turbo. all you have to do is take out the intake resonator and bolt in a pod and I get instant flutters.

GAGF if that's bad for the turbo, it came from factory like it and has run for 180,000 kms with no damage to the turbo or engine.

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sh@un Grand Master

sh@un

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yeah, sounds heaps cool- love it when some deadshit drives along in 2nd gear in traffic, gassing it then backing off just so everyone can hear his 'hectik fludderz'

sik moit :P

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Jap_Muscle Mentor

Jap_Muscle

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Yeah either it's the HKS BOV or like others have said with the metal pipe.

Any turbo car can make the noise, it just depends on the BOV set up or whatever the owner does to it.

The stock BOV should not make any noise, at least no "Stu Tu Tu".

But if you put on an air pod, while still having your stock BOV, you will get a nice "Suction" noise then a "Choo" at the end (Only when on boost).

that is incorrect.

the only relation a BOV has to flutter/dosing is whther its blocked or not. the type of flutter/dose depends on the width, length and material of the induction pipe. the turbocharger does play a roll aswell.

all a bov does is hold the air trapped in the piping. so it bounces around and goes back through the turbo, for the turbo wheel fins to chop up and make a stuttered noise.

a SSQV HKS BOV has nothing to do with dosing....its just like any other BOV... but produces a whistle like sound when air goes through it. if you block it off, its the same as your OEM bov and every other blocked bov. does nothing special.

the Dose you hear on VLs sound like stupid dolphins or piegons as you heard.

they run a small metal pipe, no bov, and multiple bends to magnify thehigh pictched stuttered noise.

alot of the high powered veicles in japan and here automaticlly produce this sound as a side affect for high horsepower aplications but usally produce a much deeper tone due to larger turbos.

this is because piping is usally much larger due to larger turbocharges and dont run many bends.

although the title says HKS SSQV, its incorrect.

personally i hate the high pitched doses, which have been attached to wogs and VLs. but i am madly in love with the noise similar to the 650hp R34 GTR videoed above. would prefer it over a OEM "CHOO" or whistle anyday

my 2c

:P

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alwaysdreaming Proficient

alwaysdreaming

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the vl boys cut a gap in there intercooler piping to put there afm so that there is no restriction between pod and turbo.

using diffrent lengths and angles of piping gives diffrent pitch noises.

alot of the guys that i went drifting with on the track a while ago had it, sounds sick when your using your accelerator to control the slide.

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