Turbo Flutter and Blitz Blow off valve

[bashpr0mpt]

Where do you even buy a camera this low quality with 1 bit sound system?

[gwilmarlio]

@bashpr0mpt yer sorry bout that the cam was great for its time considering its ment to only take pics 

[OptimusUKS2000]

Luke... I am your father !

[MichaelAPorter22]

sounds like darth vador

[Blink609]

smart idea to have your sweet blitz BOV all the way over there lol, take the stupid thing off..block the pipe and run something better close to the turbo bet you $1000 your car runs better

[gwilmarlio]

@Blink609 even better I just took the bov off with the single turbo now

[Blink609]

@gwilmarlio still going to create compressor surge and that single turbo wont last as long as it should, i know from experience and even a quick high flow and repair can cost $900 dont risk it

[NRIautos]

you know that race cars dont have bov at all, you lose air pressure with them. there shit useless piece of instrument...

[gwilmarlio]

I have been running a large sinlge turbo on this car now for over 3 and a half years with NO Blow off valve and the turbo is still going strong at 21psi I have a few mates that dont run bovs on theres Ither no dead turbos

Bovs started off to stop flutter because of noise emissions

[gwilmarlio]

I have been running a large sinlge turbo on this car now for over 3 and a half years with NO Blow off valve and the turbo is still going strong at 21psi I have a few mates that dont run bovs on theres Ither no dead turbos

Bovs started off to stop flutter because of noise emissions

[WizardOfTheKit]

sounds like your flutter dumping, your bov isnt opening right and its most likely going to make your turbo start backspooling

[gwilmarlio]

@WizardOfTheKit its impossible for the turbo to backspool there would have to be No exhaust gasses passing through the turbo for this to happen

[WizardOfTheKit]

@gwilmarlio dont know the proper term, but that pressure is not properly leaving the system thus backing up because the flutter dump is when the bov doesnt quite open all the way and just kind of flutters, with could lead to messing the turbo up, but i see what you are saying

[Konigstiger222]

sounds like the darth vadar of cars

[jieremi1]

Question. How does it flutter if you have a BOV setup? Is the BOV blocked off or?

[Safetypin6010]

Once again, I find myself stepping in, to correct the incorrect. Flutter, which is what this is, is not harmful in any way to a turbocharger. Surge, which happens under load (boost), is entirely different and can leave you with a ruined turbocharger if not taken care of.

[gwilmarlio]

@Safetypin6010  what a Champ Thumbs up

[brettenator]

@Safetypin6010 what's the difference?

[BenANDWilson]

@Safetypin6010 My subarus turbo has a little flutter when im accelerating wut should i do to stop it?

[circa2345]

@BenANDWilson nothing, its your turbo building pressure and and nothing to do with it, so it just blow off, through its waste gate.

[saintluke87]

@BenANDWilson If you get the fluttering sound under load thats where the damage is done. It has 2 forces acting againsed it - exhaust pressure under hard throttle and the surge causing back pressure on the compressor which increases shaft load and can cause your turbo to end prematurely. Its more often than not caused by a mismatched turbo. Blow back as i call it like this video doesnt do any damage. No more anyway than running it normally. Ran my car with 25psi daily driven no bov and no probs

[Typhlosion100]

@Safetypin6010 you mean Powersurge and it kills engines and turbos

[moryperu]

@Safetypin6010 hi, i have the same car, is standard, i want to put an bov, can you explain how to please, thanks a lot!!

[VQStryker]

@Safetypin6010 not to mention you feel no pull at all because the turbos are spining back and forth

[tommy15manu]

Sounds abit Strange !

[ringlol]

Surge and flutter. NICE ! that turbo will live long :)

[DanDanNissanMan]

@ringlol thats not going to do fucking jack shit to the turbo you retard! Get a fucking life kid

[ringlol]

@DanDanNissanMan Ok since when is turbo flutter good for the turbo ?

[DanDanNissanMan]

@ringlol At those rpm???? Its only doing it because its such low turbo compression that the bov dosent open.

[M3TurboE46]

@DanDanNissanMan He is right....Usually you have to be going down the road to build up enough boost to open the bov all the way

[M3TurboE46]

@DanDanNissanMan He is right....Usually you have to be going down the road to build up enough boost to open the bov all the way.....Surge is only harmful at high turbo rpm's and high boost

[21min56secs]

sounds like compressor surge...do you know what your doing??

[spoolxexo]

Compressor Surge at its finest. That setup needs a bigger hot-side. Turbine undersizing under the surge line is usually the case, to help spoolup.

[sof1map]

sounds creepy as hell haha

[quinten1231]

its amazing how many "virtual" mechanics there are on youtube!!!

[gwilmarlio]

LOL turn the other direction I have never seen a turbo spin one way then flutter to a stop then turn the other way its funny how most comments are from those that have no clue

think about it this way the turbo when spooling up happens just as fast as the turbo spinning down with flutter air is going both ways

[w00t692]

@gwilmarlio

Get a better blow off valve, and all of a sudden be amazed that the sound goes away. You can't seem to grasp this.

[Trilordy]

@gwilmarlio thats going to kill your engine.

[wizrdpower8]

@gwilmarlio it's called spooling, but over the computer i can't hear if that's what it is. and it is very possible to stop it spinning and reverse it, if there is too much pressure on your BOV release, then the air is forced out the turbo, with no other alternative.

[w00t692]

I love how they give compressor surge a cute little name "turbo flutter".

Yeah, cute name for air slamming backwards against the compressor fins forcing them to turn the other direction.

[VDZRIDER]

@w00t692 soooo your saying something spinning at like 150,000 rpm at full tilt can suddenly and abruptly stop then just spin the other direction....the amount of pressure it would take to do that would completely obliderate the internals of a conventional or aftermarket turbo...

[w00t692]

@VDZRIDER

Who said it succeeded in forcing them the other way? It isn't good for the turbo, and with the nearly frictionless effort the bearing work at on a turbo, yes, air can do this... it got up to 150k rpms with air right? Why the fuck don't you think it can't go back the other way from air?

[shortybj40]

@w00t692 haha, your funny, would like to see a turbo come to a dead stop spin the other way then you gun it again and spin it back the right way, dont try be a know all on hear it just makes you look like a tool.

[w00t692]

@shortybj40

You think i literally meant it spins backwards?  I said the air tries to force it backwards, it will never succeed in doing so. But it will make this noise when you have a blowoff valve that sucks.

[AcheLone]

little flutter on low boost won't hurt

[chchampi]

time to clean that intake :))

[reenerbeaner6]

was gonna guess 2J at first but is that a 1J

[gwilmarlio]

@reenerbeaner6 Correct dude :)

[TheCivicguyd16]

is there such a blow off valve that makes that sound on purpose.

[orkane1]

@TheCivicguyd16 yea its called a flutter valve or butterfly valve

[evilmatchbox]

@orkane1 A butterfly valve is a throttle plate. Which makes no noise. It just opens or closes.

[orkane1]

@evilmatchbox I know, i cleaned mine the other day lol, but there is a BOV that specifically made to make that "Flutter" sound. and they are generally called a Buttery BOV or a Flutter BOV.

[zomgbbqwth]

sound like he is laughing~

or something is stuck in his throat~

[mkiiiSUPRAturbo]

hahahahahhaha cleaning the turbo charger....now thats funny!!!!!!!!!!!!!

[1jsupra]

adjust the valve might be too stiff, but the flutter (compressor surge) is not good, it will kill the twins for sure!

[seanray12]

i kept on thinking it was going to say *luke, i am your father.

[zafiq77]

that is a character of Blitz BOV sound!!

[ryrysb777]

Tight bov.

[johnpham40]

Not good loosen up the spring on the bov ur turbo it just spining back wards

[Maikool180sx]

OH NOES DATH VADAR IS INVADING!

[MisterWittur]

turbo flutter = faulty bov, it doesnt open like its suppose to

[suncut21]

macam semput jer kete mamat nie.....

[quadracer111]

That dont sound healthy at all man... Thats the worst kind of flutter.

[iwillsetufree]

jævla idiota, sørg nu for fan å få skikkelig trykk så man høre flutteringa å dumpen skikkelig.. satans amatøra

[TeamFreeriderz]

@iwillsetufree trurkje dei skjønnar høtt du prøvar å sei.. tullingar

[AbhLafiel]

yea she sounds like she has a fever

[ALISTENNER]

you do know that is not good for your engine !!!

[DjMoender]

omg compression surge

[mattxhand]

There's no such thing as "turbo flutter". What you here is compression surge. Long story short, air is going the wrong way.

[opiumrx]

thats sounded like backpressure rather than a flutter.

[sky83vang]

you prob had a vacuum leak somewhere, my supra use to sound like that but more fluttering....recheck your vacuum lines..

[dundiae86]

ohye 1jzgte:D

[JonathanCross23]

every BOV gets a pressure surge .... its not healthy but its unavoidable

[emokiddy666]

way to go n damage yer turbo.

[RELOADED0000]

Wastegate controls the boost, diminishing the probability of compression surge.

[southwest82]

@reloaded

that is true to a degree, but as soon as the throttle plate closes, if there is a delay in th BOV opening due to a spring that is too heavy or a vac line leak, the compressor will surge

[JonathanCross23]

@RELOADED0000 compressor surge actually occurs after the wastegate between the TB and turbo ... when the TB shuts the air pressure has no convenient way to escape so it goes back into the turbine causing it to sound like a flutter... usually these problems are because of a malfunctioning BOV

[DLoc137]

unhealthy pressure surge which is your turbo chatter, bad,

[lushiousluke69]

its not pressure surge, when the turbo is working it is forcing pressure into the engine, when the throttle valve closes, the turbo is still going but has no where to go except out of the BOV, the BOV is kept shut by a spring, there is enough pressure to open the BOV once then once that pressure is gone it closes and where the turbo is still spinning it builds up more pressure so the BOV opens again! and again! til the turbine has stopped spinning.

[Dinocfs]

yes thats compressor surge, which really is a pressure surge

[lushiousluke69]

correct! lol. but its not a bad thing which people seem to think, its just the BOV has a strong spring.

[Dinocfs]

yeah i have known people running about 1 bar boost 3-4 years with no BOV at all and they are fine

[lushiousluke69]

but ive just watched the video again and that sounds fucked! lol

[Heath3250]

hey finally somebody knows what theyre talking about good job man. props.

[degz1s]

0:38 :/ ouch poor beby hope u fix it mate

[Spyr000]

try cleaning the turbo charger

[gwilmarlio]

and how would You do that Spyr000 ???

[RXHardstyle]

@gwilmarlio lol just throw some soap in the intake ahhah

[mitsuninja]

@gwilmarlio You know, w/degreaser and a powerwasher of course! lol

[Triple88a]

@gwilmarlio From his original advice i'd say he'll stick his finger in it while its spinning.

[tibbracing1]

@gwilmarlio oh oh ohh!! just hose it down right in the engine bay!? LMFAO what a tool Spyr000 is right lol

[5spd5thgen]

@Spyr000 lol!

[mkiiiSUPRAturbo]

@Spyr000 hahahahahahaha now thats funny

[Bamchucknorris]

@Spyr000 lol youre retarded spyr... its called compressor surge and its beacuse the bov sucks or is not properly working to release pressure in the turbo

[mikedsm12]

@Spyr000 how would that help? the bov is staying close when the throttle is shut so it back spools, funny haha

[RON2920]

ck.e-bay

RONS 4g63 go kart

[tofulenny]

that dosent sounds healthy mate.

[gwilmarlio]

you line any JZA70 on the dyno and just load the dyno up thay all sound like this

[wrx4life44]

@gwilmarlio ummm... no thats compressor surge the bov isn't opening at low boost thus the excess air goes the wrong direction through the turbine try adjusting the bov or wastegate

[T67GS300]

Comp. surge??

[simaojrcosta]

How do u put it to sound like that? Is it healthy for the turbo?

[jaxpower1]

@simaojrcosta nope

[WILDBOY122]

to me and this is just my opinion it looks very much like an sr20 or an rb26 engine from a silvia or skyline

[Genukie]

well then u need /wrist if u cant see the plenum is on the wrong side to be either a sr or rb

[bobdolesux321]

sounds like a transformer transforming

[cwmak70]

@bobdolesux321 LOL

[KennyRulz555]

lol wat r u pushin 1 pound of boost?

[gwilmarlio]

we where only just loading up the engine thats why you cant hear large amount of revs CT12A twins make boost so fast so early its like there is no turbo lag

but no good for top end

[medoseedo11]

@gwilmarlio Do you loosen the bolt on the top of the valve to create the slow flutter?

[gwilmarlio]

I had it set to come on hard

the thing is there is 2 bovs working the blitz one and the stock valve

so go figure 2 bovs 1 factory and there is still slight flutter

[medoseedo11]

@gwilmarlio So you have 2 bov's? I'm about to go boost and I know there are companies that make bovs that are designed to sound like that, but its hush hush for some reason....

[FliiiAfghani]

lol

[TOXIKKOBK]

@clancyfag. wow a celica?? are you serious?? be careful, god may steal that little treasure for himself. but no srsly, a celica... what a waste of money. i would have lied and said i had an evo or supra before i bragged about a piece of shit celica.

[bluemk3supra]

your a tool. its a nice car. itsa gt4 all wheel drive turbo car they are quick rare an will most likly imbarrase an evo so fuck off

[corolla97]

gt4 ? um jza is a supra ! rwd! 2.5l i6 1jz ! fuck tard ! this guy says its twin turbo thats a clue that its not a celica !

[xTagorex]

uhhh, i am more than sure this is a MkIII supra.

not a gt4!!! >.>

[Fastspoolsupra]

@bluemk3supra

This car is a 1jz-gte powered Supra. Parallel Twin Turbo, 2.5, Inline 6 engine from the factory. No Supra was EVER All Wheel Drive.

The year of this Supra is 1990-1992

[gwilmarlio]

Correct :)

[Rxor]

@Fastspoolsupra

your right only the celica was 4wd and i dont think we had them, only in japan, but im not sure, so feel free to correct me

[sprijic2]

@Fastspoolsupra ahahaha robot man

[clancy2k]

lol that's the lamest sounding dump valve ever

[gwilmarlio]

Thanks post yours up :)

[clancy2k]

I'm getting the impression you mean that as if i don't have a turbo charged car with a dump valve, when in act i do ;)

But i have better things to do than video it and put it on youtube lol.

[clancy2k]

fact*

[gwilmarlio]

You are my hero

so its a turbo honda then lol

[clancy2k]

Celica GT-Four actualy, only has a factory dump valve at the mo.. gonna get a HKS SSQV BOV soon i think, as it sounds awesome.

[FPAUTO]

damn thats cold blooded lol

[bmxrider50]

doesn't sound too bad...but if it was my car i might lower the spring pressure on the bov...im not a flutter fan...just sayin...

sweet ride tho

[Mitchd03]

I dont know why people think compressor surge is the worst possible thing that can happen to your turbo.

There are plenty of cars that don't run a bov from factory, mostly the early turbo cars of the 80's.

VL commodore turbos, z31 300zx's, starions, mustan turbo and many more have been fluttering away since the 80's and most are still running the original turbo without a rebuild.

Surge under load can damage a turbo, surge from closing throttle is near harmless.

[gwilmarlio]

Thank you

Most intelligent post so far

[oilfield666]

if u dont mind snapping the turbo shaft that is...its compressed air traveling back thru the compressor as it has no where to go

[gwilmarlio]

not possible

[Mitchd03]

@oilfield666 That's funny, you can't get compressor surge like this in a Diesel, because there is no throttle body. There is compressor surge under load from too big a turbo, which WILL kill a turbo, but not closed-throttle-under-full-boo­st surge.

[neo93536]

uh its called compressor surge

and yeah its possible...

[mediarocker543]

@Mitchd03, not when you get compressor shock and break your compressor blades off the spindle.

[Mitchd03]

@mediarocker543 That's funny, the 24 year old T3 turbo on my 300ZX seems okay, and so does the 26 year old T3 on the 200ZG I own. All the compressor blades are ok.

However, the 23 year old IHI RHB25 turbo on the Ford Telstar TX5 Turbo I had seized, because I neglected to let the turbo cool down before turning the motor off. The bearings and seals failed and it leaked oil into the exhaust causing massive plumes of smoke out the back of the car. However, all the compressor blades were fine.

[mediarocker543]

@Mitchd03, What PSI did you run? Lower psi systems usually dont have as violent surging.

[Mitchd03]

@mediarocker543 stock boost on all of examples I gave is around 7-8psi, and none of the cars had a boost controller when I bought them, however, that doesn't mean anything, since surge depends on the amount of air the turbo is trying to *FLOW*. Different size turbos have different surge lines.

[mediarocker543]

@Mitchd03, not just that but you can bend a throttle plate too...

[quadracer111]

@Mitchd03 Smartest fucking man here.. You said it all in your last sentence.

[UpstateEG51]

@Mitchd03

Thank god, someone who finally gets it. Truely BAD surge is the kind that occurs UNDER BOOST when you're pushing more air than the turbo can spool efficiently creating no where for it to go, Without a load, it's not even relatively close to as harmful as it is under load, full boost.

[LIP15]

@Mitchd03

This isnt surge, it's compressor stall. Nothing is surging, just the blades stalling as the chop the air running backwards through them. I'd assume this engine is cold, otherwise the BOV sping isnt rated right as it's not opening soon enough, causing flutter dump.

And as soon as you increase boost pressure, this DOES become a bad thing for turbine shafts and blades.

Only low boost [such as you said, from factory] is safe. Anything over 1 bar, or 14psi and to be honest, it's stupid

[Mitchd03]

@LIP15 Compressor surge and stall are the exact same thing. The air SURGES through the compressor, causing the wheel to STALL.

The engine being cold has absolutely NOTHING to do with how well a BOV will open.

Another factor no-one has mentioned is the size of the charge piping. A 2 foot long piece of 2" pipe has a much smaller volume of air than 6 feet of 3" pipe + an intercooler = more air to damage the turbo with.

[LIP15]

@Mitchd03

When you've done abit of learning, and then do it for a career, you might be qualified to tell me otherwise. But as it is, i do it for a career. And clearly you dont understand BOV springs etcetc, also probably wont understand the reasons for oil in the charge pipe system [NOT from the turbo seals, the light film] which gets into the dump valve.

[Mitchd03]

@LIP15 And I suppose in your... 90 years of life, you have achieved a Doctorate in Fluid Dynamics, and have taken high speed footage of turbochargers stalling?

BOV spring pressure effects the amount of pressure difference required for the bov to open. The temperature of the engine will not effect the springs stiffness rating. If you have a soft spring, the BOV will go off at the slightest hint of vacuum, if you have a stiff spring, it may take full vacuum to open.

[evilmatchbox]

@Mitchd03 But a wider pipe would still have the same amount of pressure in it. And as long as it has the same ratio of width to length pipes were used i don't think it would be any different. Like It has more area for the pressure to be relieved . Like the different lengths of pipe you said (6-2ft) 3:1 ratio If the width of pipe was 3(ratio)*(1/2{pie}2^2)= area of circle.

[DirtyPunkLove]

external wastegate should help too

[Mitchd03]

@DirtyPunkLove No it wouldn't.

[sm0key69er]

really bad boost serge not good.

[4everfresh7]

Lame blow off valve,get a better one :D

[nissansilviaS10]

cause mechanical damage, or in a small surge disrupt the operation/speed of the compressor momentarily (this is what we typically experience in a boosted car w/o a bov a bov releases an over-pressure situationbetween the compressor outlet and the throttle blade that would otherwise slow, stall, or damage the compressor.

[nissansilviaS10]

you do realize thats compressor surge? surge generally refers to a condition where airflow moves backwards in the compressor, whether in an axial flow compressoror a centrifugal compressor (ie: turbocharger)airflow moving in two directions during surging "crashes" inside the compressor and can stall the compressor,

[hiimcam]

yeh thats compressor surge, the turbo is trying to flow more air than the engine can ingest... not good for your turbos...

[StatusQuo209]

the bov is to release the pressure when the throttle closes....u need a bov to pervent "turbo studdering" .....once the the throttle closes, the is nowhere else for the air pressure to go ...the only way it can go it out from the turbo where the air came in from the first place, this causes a loud studdering sound.... ... this is NOT good because it would cause the turbine to stop... thats where the bov comes in. basicly its to keep the air flowing in one direction to reduce turbo lag/damage.

[GrkDrewsky]

I'm no mechanic, and no expert on turbos, but I do know one thing... that surging flutter is not healthy.

[2k3SteedaGT]

sounds like shit!

[nitroblood]

sound like scooby doo laughing..

[david9639]

sounds like General Grievous from Star wars

[tibu266]

REALLY LOLL

[ubershoe]

start saving man :P its never good

[YFZRIDR91]

thats surging, not good

[chuckmontello]

it might be the camcorder. but it does sound like a surge. if anything ill check for shaft play first. it might be a blown bearing

[Foxy300ZX]

i hear boost surge too.

i would just get a new car :)

[david9639]

that engine needs some cough syrup

[26jhood]

your engine is perfect its the camera or camcorder ur using goo job man big ups

[jakepossemato]

you know that's a bad noise, right?

[marbles100284]

no its not its how thay come from the factory

[deathcrayon]

No Your Wrong, BAD NOISE.

[KBGT94]

turbo flutter = bye bye motor

[bnz500]

Youre fucking stupid. Go and play your video games you stupid cum stain. Your mum should have swallowed you. STFU.

[420991]

compressor surge is not a good thing.

[samelod]

doesnt sound healthy at all! lol

[HCaunus]

osta taunus, vitun köyhä