the pressure goes back through the turbo which will snap the fins under alot of preassure or it will wear them out.... i believe it will ruin it and i dont think its the bov ( im not being a mr smart guy im just saying thats what i think) if u think anything different plz tell me kuz i want to know other info about the chatter
@drifty200SX It isn't the waste gate! wastegates do not shudder or chatter! It is the lack of BOV causing the air to be chopped up by the turbo and going back out the air filter
it is slight flutter, propably caused be cause the bov(i assume it has 1) isnt getting enough pressure to open.
and for all those who thinks is damages it, prove it, every 1 says it causes damage and it does make sense. my car has done over 15,000km with no problem (gt2530) at 1.2bar and ive herd of more than a few other ppl making 500hp+ and no problem for over 25,000km. im yet to actually meet any 1 that has had a turbo fail BECAUSE of flutter
lol after reading some of ur coments i will just like to say the car is not 100bhp and iknow that for a fact because the person who owns that car is my friends dad and secondly he doesnt us that car anymore he had two new nissans which are well faster then that :)
As far as i understand and correct me if im wrong. That is just flutter. Surge is when it makes that sound while under boost. I dont see anything wrong with that.
Although the audio sucks, I've heard a stuttering sound from a BOV that's to tight letting the flow of compressed air slam against the closed throttle body, then bouncing back and forth off the turbo. It's not a good thing for longevity, but I've heard vid clips of cars set up by pros having the same thing happen. It prevents the metered air, dumping into the atmosphere and the mix going rich. It prevents minor power loss between shifts. @944s2 it's not cavitation b/c air doesn't boil.
@electricshockproof Sure, wastegate flutter occurs under partial boost conditions such as part throttle near the boost threshold. It sounds like FftFftFft and is caused by the rapid opening and closing of the wastegate at boost levels near the spring pressure. Usually heard more clearly on cars with modified intakes, up-pipes, and or downpipes.
@electricshockproof If its not that then I would think its possibly compressor stall as the accelerator is released the throttle plate closes, forcing the already compressed air back out through the turbo as there is no BOV. The sound is caused by the blades of the compressor wheel chopping the air causing the tsutsu tsu sound.
@namelessloser1 How the fuck did you get 8 thumbs up! I'm sick to fucking death watching tough car vids and gronks like yourself talking aboiut compressor surge! It depends on your turbo first of all 2nd to me it looks like a hks turbocharger which most like has an anti surge housing giving you the sick noise! No Bov No wastegate alright dickhead! And last but not least i think someone or at least the tuners of this beast know wtf they are doing!
If you didnt have enough people explaining this, its just the throttle has been shut and the some of the compressed air isnt getting out so its going back through the turbo making it spin backwards. not good =(
compressor surge is fine never seen a problem occur ever with out a bov. go spend hell cash on a bov man, be cool with your whistle, stickers and rear wing.
hats a compression sureg mate when the air is forcing the turbo to spin the other way no good for your turbo whatsoever eventhough it sounds absoulutly amazing lmao
@gangsterburrinator doesnt spin the other way around retard. the sound is the blades in the turbo cutting through the air that is trying to go the opposite way. of course it doesnt make the turbo spool the other way.
i think full jdm cars are cool. no blowoff valve as turbo gets replaced often. standard cars only have them because turbo has to last a while, its all weight end of day.
@Anonymoustipoff a lot of race cars don't use BOV's... it's about longevity of the turbos, which race teams don't always have to worry about. it's actually a way of making sure you DONT have leaks in your system. they're called block off plates or something.
@Kyu1LL yes but when you shut off the throttle you get a build up of pressure which in turn slows the compressor wheel down. on bigger turbos it makes a difference in spool time which on higher torque engines at lower rpm can be more noticable.
@Anonymoustipoff then when would it be proper to use blockoff plates? I thought it was for high rpm engines that don't need to worry about spool time, like twin turbos
@Kyu1LL if your drag racing then they would be ok because theres very little time off throttle and you're prob using anti lag or nos so spool time dosent come into it
if your rallying then your restricted to say 300hp but can run much higher torque and theres more time off throttle with lower speeds then turbo response time is very important.
high rpm engines with no bov will still spool slower than one with a bov although much less noticable.
they have the money to put new turbos on every race. and surging just causes studdering after shiffting and it takes a little while to ruin the bearings its not like it just goes boom.
They dont need them because theres no proof compressor surge actually damages turbos. The theory makes sense but its hard to replicate. Have a look at the old turbo F1 cars, over 1500hp and no BOV, they seem to run just fine, rally cars is another example
Err, race cars do use dump valves!! They mainly use them, not because of the inherant dangers of compressor surge, but because the built up pressure is released instantly allowing the turbo to spin back up more quickly. The reason the old turbo charged F1 cars didn't use a dump valve is because like the engines in F1, the turbo was replaced for every race anyway so reliability didn't matter.
@ GTiDog...yep +1, also pehaps the bov wasn't around yet? its not like the guy who made the first tubro'd engine had a bov lying around, waiting for the turbo to be created so he could use it! haha.
to all "Compessor surge is not good" commintatorsout there.. is this your boyfriend? why do you care?
rally cars use BOVs, ever hear that sqeaking sound when they let off the throttle? Everyone knows BPVs and BOVs have a purpose and you're better off with them. Why do you think most people and manufacturers use them?
They usually use recirculating valves. If the car is automatic or sequential, they sometimes avoid them to keep the constant pressure in the intake line, since the throttle isn't constantly closing and backing up pressure like an MT car does.
compressor surge is fine never seen a problem occur ever with out a bov. go spend hell cash on a bov man, be cool with your whistle, stickers and rear wing.
@namelessloser1 its not compression serge.. its Cavitation.. Compression surge is where the turbo gets overwhelmed by boost.. the boost pressure gets so high that it creates a surge through the turbine and you over boost.. causing extreme turbo problems.. and your right by saying its not good at all..
but cavitation is excess boost pressure being forced through the turbo backwards.. creating that flutter sound.. on a car like that it isnt bad.. as if it was on high boost it would have a BOV
@ManifestMikey "excess boost pressure being forced through the turbo backwards" is compressor surge because when the throttle body closes and there's no bov all the created boost has no were to go and it starts to make its way back to the compressor wheel
@supradave9 Compressor surge is when you have a turbo thats too big for the engine.. the turbo sucks in far too much air for the engine to cope.. air gets backed up in the boost pipes while more air is forced through.. the pressure from that causes the compressor too become over whelmed with the amount of air going in and getting forced straight back through, that creates a surge destroying the turbo, along with the engine.. '
@supradave9 ''waste gate chatter'' is cavitation.. its a low amount of boost pressure being forced back through.. rather that a large amount being forced into the engine and back through the turbo at the same time due too the mass amount blocked in the boost pipes..
@ManifestMikey dude the wastegate is a bypass valve connected to the exhaust manifold. at a certain pressure the wastgate opens to allow the exhaust to bypass the turbine so that you dont overboost the turbo, or so that you dont go over a set boost pressure
@ManifestMikey i work for garrett and build turbo's the noise is not cavitation, this happens on a boat on the outer edge of the propeller and yes it does make a noise but this is not the same, as soon as the throttle body closes its the excess turbo pressure stalling the turbo and being forced back u the intake.
@944s2 yes i know this, the correct term for the noise is Cavitation or ''Dose'', wrongly known as Wastegate Chatter or Compressor surge.. compressor surge is when you run a turbo thats too big for the engine, and it forces too much air into the engine, creating back preassure destroying the turbo and engine.. but dosnt make this noise at all.. ''Cavitation'' is air passing through a compressor, turbine, or propeller the wrong way..
@ManifestMikey so called wastegate chatter and comp surge are tow different things ffs. wastegate chatter is when you let off the throttle but the turbo is still spinning so the noise you hear is the boost pressure going the wrong way through the turbo blades. comp surge is when the two wheels of the turbo are miss matched and the turbo is trying to supply more air than is actually needed. do some sodding research first will you. your even saying someone who works with turbo's is wrong.
@ManifestMikey so called wastegate chatter and comp surge are tow different things ffs. wastegate chatter is when you let off the throttle but the turbo is still spinning so the noise you hear is the boost pressure going the wrong way through the turbo blades. comp surge is when the two wheels of the turbo are miss matched and the turbo is trying to supply more air than is actually needed. do some sodding research first will you. your even saying someone who works with turbo's is wrong.
cavitation when it comes to a boats prop is water boiling on the edge of the blade. as the prop spins it generates an area of low pressure (ljust like an airplane prop) on the blade and the temperature that water boils at is dependent on presure as well as temperature. cavitation is tiny bubbles of water boiling to gas (steam) on the prop.I am not proclaomong to know anything about turbos other than there a compressor driven by exhaust gases to enable more air/fuel into the engine.
@markbarry1977 Cavitation isnt water boiling on a prop, its from agitated water that has air bubbles in it before it gets to the prop and causes the prop to spin easier and slip. It would take serious heat to boil water as it comes off blades spinning in water, they dont get that hot and turbos dont cavitate either.
@namelessloser1 that sound is not compressor surge its just turbo flutter from either running no blow off valve or the bov didnt open. True compressor surge is when the turbo is building boost an it sounds like its chattering an cutting out while its building boost.
@42RANGA Because it can damage the turbo and make it almost useless. The gist of a surge is the compressor generates more air than it can spit out, causing it to reverse and slow.
@nwfklan Even at low boost the turbo is spinning 30k to 70k RPMs, when the BOV can't completely purge the pressure out of the system and it causes the turbo to fluctuate rapidly going faster and slower by tens of thousands of RPMs within milliseconds or less due to pressure, that's stress on the center shaft and wear on the bearings and every bit adds up overtime. For those who got the money not to care or just think its cool like most of the trendy saps out there i guess it doesn't matter.
@namelessloser1 you have no idea what compress surge is do you.... cause the pitter patter at the end is not what compressor surge is. Look up True Compressor Surge. Surge is over boosting under load (aka WOT) This video here is a blow off valve not surge
@namelessloser1 There is absolutely nothing wrong with compressor 'surge' when throttling off, it is only bad when you have wide open throttle. Lots of cars didn't come with bovs and have no issue.
actually its compresser surge, happens when un released pressure forces th compresser turbine to spin backwards, normally a good fast reacting BOV will correct this problem
@starquest92 - almost right. the turbine never actually spins backward, the back flow of air rushing over the blades trys to turn it backward, thats why that noise is created.
Air can reverse direction without the compressor spinning backward. Think hard, you can blow through a turbo either direction with a locked wheel up wheel. Air flow direction =\ turbine direction.
Hey canned clips, incase knowone has told u yet, its the turbine inside the turbo that makes the "Chatter" its normally called flutter but whatever. Its chopping up the air inside because it cant get out because the blow-off valve is closed. which isnt good obviously because the air isnt escaping. This results in harm to the turbo and can stall it. It shouldnt make too much damage on a car car that hasnt been tuned that much though. :)
"waste gate or Blow off valve" wich releases excess air that the turbo is sucking into the the intercooler, that the best guess i could do althoe that spool that the turbo did, its a sign of that motor has balls...
the car in this video is the M.I.J performance car for the guys in Walsall I no iv got 2 mates that work there I will highly recommend getting work done there.
ok ? how is this compressor stall? not being a nobb but compressor surge as i under stood was the turbo ingesting air and not the motor not alowing the air to move (throtle body closed) but the blades still spinning xxx rpm (so you are hearing the blades chop the air) shhhhchaaa chaa chaa sound! there for slowing the compresser wheel down and causeing lag in the next gear.
It is a "stall" becuase the air that has been compressed cannot go through the closed throttle body so it comes back out of the compressor the wrong way forcing the compressor to slow down (stall) and it makes a nice noise while it's doing so. Compressor surge is when the compressor speeds up due to excess exhaust gas going through the turbine (anti-lag sort of demonstrates this effect, throwing loads of fuel in to build the boost up even though the throttle is closed)
for all who think that is a "huge turbo" i don't necessarily think that is large at all. take a look at a cummins diesel turbo. they are the size of a basket ball. i think its just a large aluminum cold air fitting that does well. suck in a lot of frigid air. and as everyone know. cold air = good. lol just my opinion don't hate
ok cummins turbo is not the size of a basket ball it has a 3" inlet! the turbo sucks in air (yes) but what happens to air that is compressed? it gets heated now the intercooler comes in to play and cools the hot air to a out side air temp!
This comment has received too many negative votesshow
its a vacuum how does it need help directing the air into the turbo. u don't know shit about cars b/c as teh air comes past the aluminum fitting it cools the aluminum and its cold. and as air goes past the cold aluminum. what happens Jr.? st fu and don't negative on my comments i know more about cars that u could imagine.
Lol don't get upset...It's purely to smooth air flow, Nothing more. So you don't have turbulent air entering the compressor. (look at the front of a aircraft's jet engine. They are always ducted for this reason.)
well from my knowledge of racing motorcycles. i know aluminum pieces are put on the intake manifolds just like those that make the air colder some how. sorry i dont have the phd and can make it sciency for you retards. but i do know what the hell im talking about. and it does make the air colder. ask the poster. ask auto zone, o'rieleys, napa. acdelco.
i dont need to go with odds. i've been in racing for years. its not somehow u noob. it just does mayb its teh air that is getin sucked in to the turbo that cools the alum fitting, and well the alum fitting is chilled the air rushing past will be cooled also. it simple racing knowledge and idc about what u guys say for real im done talkin to idiots. it could be 10000 v 1. but i'd still be right. did anyone go to auto zone like i said? or just try ur local repair shop. im not wrong here guys.
i know my fair share about cars specially forced induction engines and man i can tell you straigh of the bat that not a 550hp car its more impossible that an r34 with such tuning and such a big turb like that one only has 550hp my friends bmw m3 puts out 580rwhp and his turbo is not that big lol but im jst saying if it does have 550hp then it def not tuned and if it wasnt tuned it wouldnt be considered a well prepared race car at leats 680hp+++
or 1000bhp as the video says that i belive with a turbo that size ... pzz if you feel im wrong i would like to hear or read ur wat u have to say and please no bullshit threatening demeaning 12 year old comment keep it clean keep it fresh
Yes they do, under partial throttle near the threshold boos pressure. When the wastegate spring keeps opening and closing rapidly. This is just turbo flutter though...
wow for you to jump out calling names makes me realize how immature you are. i was simply just stating something assuming you were going on looks, not just going off the basic sound of a Greddy BOV sounds like every other one i have heard out there.... SEX .... think not
sorry but did you even see the whole video before you commented on my comment?cause its preety noticable that the car has a bov in the video....plus to challenge my knowledge with cars kinda made me mad:D
yeah i just dont think the wooshing bov was sexy sounding so therfore i thought you were going off looks but everyone has their own tastes. and yes i was very sure a 1000bhp turbo car of any kind has a bov lol very costly not to
This is what happens without a blow off valve, air comes through the front of the turbo slowing it down and killing off boost. In high horsepower cars, this is actually the most effective way of killing boost between shifts, if the turbo spins too fast and makes to much boost going into another gear....goodbye head gaskets.
now, dont make fun of my lack of turbo knowledge but, why would u wanna kill kill in between shifts? wouldnt u wanna keep it up so when u hit the next gear the turbo doesnt have to wind up again? and where on the turbo/engine is the blow off valve? again, no bashing me. i admitting my lack of knowledge on this and seeking info. at least im not a poser, right?
Well, if the turbo remains wound up at let's say...25 psi going into 3rd gear from second...then you'd have way to much air and not enough fuel for the lower rpm range you're engaging in, it leans out. This will cause overheating, and imminent engine failure. Blow off valves are located on the turbo compressor, while waste gates are tuned to only let a certain ammount of PSI (boost) into the engine, those are located between the exhaust manifold and the turbo compressor.
no, not compressor surge...or Axi-symmetric stall for motor heads out there. Although in that senario i've estalblished, if you did have a HUGE turbo on a small engine, then it could cause compressor surge because there isn't enough airflow going into tiny cylinders, which causes air to flow backwards into the turbo...and BAM the turbo will pittle out until the psi is back to operational standards for that engine. I was basically stating what B.O.V. and wastegates do, and where they go.
You sound like you know what you are talking about. WTF are you doing commenting on youtube? Don't you know that youtube comments are only for the misinformed and clinically retarded?
the pressure goes back through the turbo which will snap the fins under alot of preassure or it will wear them out.... i believe it will ruin it and i dont think its the bov ( im not being a mr smart guy im just saying thats what i think) if u think anything different plz tell me kuz i want to know other info about the chatter
Icecube5285 1 month ago
It's just wastegate shuttering, the sound is not alarming to me at all.
Every car without a bov could make that sound.
Turbo's will only suffer from compression surge when on high boost( around/higher than 2.0< bar).
Most high hp cars don't have a bov, you just need a proper wastegate to handle the turbopressure.
drifty200SX 7 months ago
@drifty200SX It isn't the waste gate! wastegates do not shudder or chatter! It is the lack of BOV causing the air to be chopped up by the turbo and going back out the air filter
roflex2 7 months ago
yeah agreed, my gt30 s13 sr20 19psi, is at 40,000km so far, nothing but a coil pack and a retune. no BOV at all...
Lorantl 7 months ago
lol every 1 thinks they know it all...
it is slight flutter, propably caused be cause the bov(i assume it has 1) isnt getting enough pressure to open.
and for all those who thinks is damages it, prove it, every 1 says it causes damage and it does make sense. my car has done over 15,000km with no problem (gt2530) at 1.2bar and ive herd of more than a few other ppl making 500hp+ and no problem for over 25,000km. im yet to actually meet any 1 that has had a turbo fail BECAUSE of flutter
JCaSs1001 7 months ago 3
@JCaSs1001 THUMBS UP!! i \k for a fact if your turbo cant push the pis for a hks ssvq youll flutter all the way down the street lol
mentalmystic47 7 months ago
This is definitely flutter dump. Not good. Doesn't sound horrible... maybe there's a BOV on there already that just isn't letting out early enough.
therookie93 7 months ago
lol after reading some of ur coments i will just like to say the car is not 100bhp and iknow that for a fact because the person who owns that car is my friends dad and secondly he doesnt us that car anymore he had two new nissans which are well faster then that :)
A5ADA1AM 9 months ago
As far as i understand and correct me if im wrong. That is just flutter. Surge is when it makes that sound while under boost. I dont see anything wrong with that.
bboy310 10 months ago
some one tell me how they do thos single turbo conversions ??
rockybigballs89 10 months ago
@rockybigballs89
Manifold with a flange for a single turbo instead of twin... ????
AUSBen31 9 months ago
@AUSBen31 you recon its easier on the petrol also nice one man
rockybigballs89 9 months ago
FUUUUUUUUUU
nags555 10 months ago
Weak
Origional79s 11 months ago
Although the audio sucks, I've heard a stuttering sound from a BOV that's to tight letting the flow of compressed air slam against the closed throttle body, then bouncing back and forth off the turbo. It's not a good thing for longevity, but I've heard vid clips of cars set up by pros having the same thing happen. It prevents the metered air, dumping into the atmosphere and the mix going rich. It prevents minor power loss between shifts. @944s2 it's not cavitation b/c air doesn't boil.
Blessedtouch 1 year ago
how much money was put into this car?
brickwester 1 year ago
@brickwester toooo much
MegaChevyjoe 11 months ago
Does anyone saying its compressor surge even know what they are on about? You don't get copmpressor surge when you release the accelerator!
hardhouseandy 1 year ago
@hardhouseandy No? Well what's the sound?
electricshockproof 1 year ago
@electricshockproof as it says in the title, wastegate chatter, or, possibly the actuator.
hardhouseandy 1 year ago
@hardhouseandy Could you explain?
electricshockproof 1 year ago
@electricshockproof Sure, wastegate flutter occurs under partial boost conditions such as part throttle near the boost threshold. It sounds like FftFftFft and is caused by the rapid opening and closing of the wastegate at boost levels near the spring pressure. Usually heard more clearly on cars with modified intakes, up-pipes, and or downpipes.
hardhouseandy 1 year ago
@electricshockproof If its not that then I would think its possibly compressor stall as the accelerator is released the throttle plate closes, forcing the already compressed air back out through the turbo as there is no BOV. The sound is caused by the blades of the compressor wheel chopping the air causing the tsutsu tsu sound.
hardhouseandy 1 year ago
Dude look at that turbo, holy jesus man!
fatpat81 1 year ago
That turbo was stolen from KnightRider, give it back asshole.
xXTrippaXx 1 year ago
Nah mate da inlet trumpet is made for sucking up little people init. Internet helmets
rs250nut 1 year ago
its d sound of d turbo fan u dumb ass...
lennyus143 1 year ago
@namelessloser1 How the fuck did you get 8 thumbs up! I'm sick to fucking death watching tough car vids and gronks like yourself talking aboiut compressor surge! It depends on your turbo first of all 2nd to me it looks like a hks turbocharger which most like has an anti surge housing giving you the sick noise! No Bov No wastegate alright dickhead! And last but not least i think someone or at least the tuners of this beast know wtf they are doing!
WhoLvsUTubeULuvUTube 1 year ago 2
I think it a multi plate clutch chater
turbo280z 1 year ago
thats not a big turbo.....look at the 114mm turbo!!!! thats a big mo fo
silentrage87 1 year ago
ouch . a surge . nice car . thumbz up .
yagam1 1 year ago
that turbos not that big its just the inlet cone that makes it look larger.
mean71cuda 1 year ago
If you didnt have enough people explaining this, its just the throttle has been shut and the some of the compressed air isnt getting out so its going back through the turbo making it spin backwards. not good =(
Serialkilla7 1 year ago
@Serialkilla7 That is true but in todays turbos its not as big an issue anymore they can handle it.
oneflyline96 1 year ago
@Serialkilla7 Not spin backwards, but it is the sound of air being chopped by the compressor wheel.
amahonda99 1 year ago
@amahonda99 The compressor wheel can spin backwards and it puts alot of stress on the bearings in the turbo.
Serialkilla7 1 year ago
Nuked turbo in 3...2...1....
Compressor surge for the win. You need a bigger bypass valve (blow off valve)
DarkApollo1000 1 year ago
this is my porn <3
PwinceCharminAmin 1 year ago 27
compressor surge is fine never seen a problem occur ever with out a bov. go spend hell cash on a bov man, be cool with your whistle, stickers and rear wing.
jasonrwall83 1 year ago
e-mechanics make me laugh...
cash1jz 1 year ago
hats a compression sureg mate when the air is forcing the turbo to spin the other way no good for your turbo whatsoever eventhough it sounds absoulutly amazing lmao
gangsterburrinator 1 year ago
@gangsterburrinator doesnt spin the other way around retard. the sound is the blades in the turbo cutting through the air that is trying to go the opposite way. of course it doesnt make the turbo spool the other way.
machetero1 1 year ago
by the look of it id say its probably the sound of the vortex turbo winding down
gangsterburrinator 1 year ago
wounder how long that turbo will last with no air filter !
Ginolaamg32 1 year ago
the sound is called a compressor surge
scatpack 1 year ago
@scatpack the sound is called a synchronic blow off valve
bigdaddylovestori 1 year ago
@bigdaddylovestori
there was definitely a surge in there too.
Joelit121 1 year ago
@bigdaddylovestori no its not... its compressor surge
19423j 1 year ago
@19423j no its not... its Cavitation..
ManifestMikey 1 year ago
Nice skyline don't like the colour tho.
milesK12 1 year ago
i think full jdm cars are cool. no blowoff valve as turbo gets replaced often. standard cars only have them because turbo has to last a while, its all weight end of day.
UBERKron 1 year ago
@UBERKron yeah but with no bov you get slower boost response not good for a race car
Anonymoustipoff 1 year ago
@Anonymoustipoff a lot of race cars don't use BOV's... it's about longevity of the turbos, which race teams don't always have to worry about. it's actually a way of making sure you DONT have leaks in your system. they're called block off plates or something.
Kyu1LL 1 year ago
@Kyu1LL yes but when you shut off the throttle you get a build up of pressure which in turn slows the compressor wheel down. on bigger turbos it makes a difference in spool time which on higher torque engines at lower rpm can be more noticable.
Anonymoustipoff 1 year ago
@Anonymoustipoff then when would it be proper to use blockoff plates? I thought it was for high rpm engines that don't need to worry about spool time, like twin turbos
Kyu1LL 1 year ago
@Kyu1LL if your drag racing then they would be ok because theres very little time off throttle and you're prob using anti lag or nos so spool time dosent come into it
if your rallying then your restricted to say 300hp but can run much higher torque and theres more time off throttle with lower speeds then turbo response time is very important.
high rpm engines with no bov will still spool slower than one with a bov although much less noticable.
Anonymoustipoff 1 year ago
@Kyu1LL you still need to worry about spool time with twin turbos but it starts to get more complicated to explain.
Anonymoustipoff 1 year ago
can you say huge cam...
scoobieblue18 1 year ago
privatealpha
they have the money to put new turbos on every race. and surging just causes studdering after shiffting and it takes a little while to ruin the bearings its not like it just goes boom.
rieder555 1 year ago
i'm curious to see the boost indicator in that turbo...
R3medith 1 year ago
Err race cars dont use blow off valves.
They dont need them because theres no proof compressor surge actually damages turbos. The theory makes sense but its hard to replicate. Have a look at the old turbo F1 cars, over 1500hp and no BOV, they seem to run just fine, rally cars is another example
privatealpha 1 year ago
Err, race cars do use dump valves!! They mainly use them, not because of the inherant dangers of compressor surge, but because the built up pressure is released instantly allowing the turbo to spin back up more quickly. The reason the old turbo charged F1 cars didn't use a dump valve is because like the engines in F1, the turbo was replaced for every race anyway so reliability didn't matter.
GTiDog 1 year ago 3
@ GTiDog...yep +1, also pehaps the bov wasn't around yet? its not like the guy who made the first tubro'd engine had a bov lying around, waiting for the turbo to be created so he could use it! haha.
to all "Compessor surge is not good" commintatorsout there.. is this your boyfriend? why do you care?
localrespect 1 year ago
+1 from me dude spot on.
milesK12 1 year ago
rally cars use BOVs, ever hear that sqeaking sound when they let off the throttle? Everyone knows BPVs and BOVs have a purpose and you're better off with them. Why do you think most people and manufacturers use them?
95GST16g 1 year ago
They usually use recirculating valves. If the car is automatic or sequential, they sometimes avoid them to keep the constant pressure in the intake line, since the throttle isn't constantly closing and backing up pressure like an MT car does.
ArcticGTS 1 year ago
compressor surge = no good at all
namelessloser1 1 year ago 26
This has been flagged as spam show
@namelessloser1
compressor surge is fine never seen a problem occur ever with out a bov. go spend hell cash on a bov man, be cool with your whistle, stickers and rear wing.
jasonrwall83 1 year ago
@namelessloser1 its not compression serge.. its Cavitation.. Compression surge is where the turbo gets overwhelmed by boost.. the boost pressure gets so high that it creates a surge through the turbine and you over boost.. causing extreme turbo problems.. and your right by saying its not good at all..
but cavitation is excess boost pressure being forced through the turbo backwards.. creating that flutter sound.. on a car like that it isnt bad.. as if it was on high boost it would have a BOV
ManifestMikey 1 year ago
@ManifestMikey "excess boost pressure being forced through the turbo backwards" is compressor surge because when the throttle body closes and there's no bov all the created boost has no were to go and it starts to make its way back to the compressor wheel
supradave9 1 year ago
@supradave9 Compressor surge is when you have a turbo thats too big for the engine.. the turbo sucks in far too much air for the engine to cope.. air gets backed up in the boost pipes while more air is forced through.. the pressure from that causes the compressor too become over whelmed with the amount of air going in and getting forced straight back through, that creates a surge destroying the turbo, along with the engine.. '
ManifestMikey 1 year ago
@supradave9 ''waste gate chatter'' is cavitation.. its a low amount of boost pressure being forced back through.. rather that a large amount being forced into the engine and back through the turbo at the same time due too the mass amount blocked in the boost pipes..
ManifestMikey 1 year ago
@ManifestMikey dude the wastegate is a bypass valve connected to the exhaust manifold. at a certain pressure the wastgate opens to allow the exhaust to bypass the turbine so that you dont overboost the turbo, or so that you dont go over a set boost pressure
supradave9 1 year ago
@supradave9 yeah i know what a waste gate is..... im just saying that noise has nothing to do with the waste gate at all.. lol
ManifestMikey 1 year ago
@ManifestMikey i know that
supradave9 1 year ago
@ManifestMikey i work for garrett and build turbo's the noise is not cavitation, this happens on a boat on the outer edge of the propeller and yes it does make a noise but this is not the same, as soon as the throttle body closes its the excess turbo pressure stalling the turbo and being forced back u the intake.
944s2 1 year ago
@944s2 yes i know this, the correct term for the noise is Cavitation or ''Dose'', wrongly known as Wastegate Chatter or Compressor surge.. compressor surge is when you run a turbo thats too big for the engine, and it forces too much air into the engine, creating back preassure destroying the turbo and engine.. but dosnt make this noise at all.. ''Cavitation'' is air passing through a compressor, turbine, or propeller the wrong way..
ManifestMikey 1 year ago
@ManifestMikey so called wastegate chatter and comp surge are tow different things ffs. wastegate chatter is when you let off the throttle but the turbo is still spinning so the noise you hear is the boost pressure going the wrong way through the turbo blades. comp surge is when the two wheels of the turbo are miss matched and the turbo is trying to supply more air than is actually needed. do some sodding research first will you. your even saying someone who works with turbo's is wrong.
iansr33 1 year ago
This has been flagged as spam show
@ManifestMikey so called wastegate chatter and comp surge are tow different things ffs. wastegate chatter is when you let off the throttle but the turbo is still spinning so the noise you hear is the boost pressure going the wrong way through the turbo blades. comp surge is when the two wheels of the turbo are miss matched and the turbo is trying to supply more air than is actually needed. do some sodding research first will you. your even saying someone who works with turbo's is wrong.
iansr33 1 year ago
@944s2
cavitation when it comes to a boats prop is water boiling on the edge of the blade. as the prop spins it generates an area of low pressure (ljust like an airplane prop) on the blade and the temperature that water boils at is dependent on presure as well as temperature. cavitation is tiny bubbles of water boiling to gas (steam) on the prop.I am not proclaomong to know anything about turbos other than there a compressor driven by exhaust gases to enable more air/fuel into the engine.
markbarry1977 1 year ago
@markbarry1977 Cavitation isnt water boiling on a prop, its from agitated water that has air bubbles in it before it gets to the prop and causes the prop to spin easier and slip. It would take serious heat to boil water as it comes off blades spinning in water, they dont get that hot and turbos dont cavitate either.
forcefedmitsu 1 year ago
@namelessloser1 but it sounds great :)
Viesor 1 year ago
@namelessloser1 Bullshit :)
necroticearth 1 year ago
@namelessloser1 that sound is not compressor surge its just turbo flutter from either running no blow off valve or the bov didnt open. True compressor surge is when the turbo is building boost an it sounds like its chattering an cutting out while its building boost.
xxdboyerxx 1 year ago 3
@namelessloser1 why not?
42RANGA 10 months ago
@42RANGA Because it can damage the turbo and make it almost useless. The gist of a surge is the compressor generates more air than it can spit out, causing it to reverse and slow.
streetskater03 10 months ago
@namelessloser1 Its a ballbearing turbo.... They take no damage from it at all..
cosworth89 10 months ago
@namelessloser1 Compressor surge doenst really do any harm when running low boost (lower then 1bar)
nwfklan 10 months ago
@nwfklan Even at low boost the turbo is spinning 30k to 70k RPMs, when the BOV can't completely purge the pressure out of the system and it causes the turbo to fluctuate rapidly going faster and slower by tens of thousands of RPMs within milliseconds or less due to pressure, that's stress on the center shaft and wear on the bearings and every bit adds up overtime. For those who got the money not to care or just think its cool like most of the trendy saps out there i guess it doesn't matter.
drewnashty 9 months ago
@namelessloser1 you have no idea what compress surge is do you.... cause the pitter patter at the end is not what compressor surge is. Look up True Compressor Surge. Surge is over boosting under load (aka WOT) This video here is a blow off valve not surge
ECLPST 8 months ago 2
@namelessloser1 There is absolutely nothing wrong with compressor 'surge' when throttling off, it is only bad when you have wide open throttle. Lots of cars didn't come with bovs and have no issue.
roflex2 7 months ago
@namelessloser1 kfc aint good for us either, but we still eat it
JasonMann8 6 months ago 2
@namelessloser1 as long as its on deceleration it shouldnt do too much damage
cincysilvia8807 4 months ago
actually its compresser surge, happens when un released pressure forces th compresser turbine to spin backwards, normally a good fast reacting BOV will correct this problem
starquest92 2 years ago
@starquest92 - almost right. the turbine never actually spins backward, the back flow of air rushing over the blades trys to turn it backward, thats why that noise is created.
Baptisteiom 2 years ago 2
believe me that happens, we have a 250hp turbo car that blowed out air through the air filter!!!! after we installed a BOV it never happened again.
saarkke 2 years ago
Air can reverse direction without the compressor spinning backward. Think hard, you can blow through a turbo either direction with a locked wheel up wheel. Air flow direction =\ turbine direction.
aaronbertram 2 years ago
ok I agree :p, my bad
saarkke 1 year ago
whoa
NewarkGothIndustrial 2 years ago
If u are confused at all search turbo flutter or flutter dump on youtube. That should help. :)
CR4NN3RZ 2 years ago
Hey canned clips, incase knowone has told u yet, its the turbine inside the turbo that makes the "Chatter" its normally called flutter but whatever. Its chopping up the air inside because it cant get out because the blow-off valve is closed. which isnt good obviously because the air isnt escaping. This results in harm to the turbo and can stall it. It shouldnt make too much damage on a car car that hasnt been tuned that much though. :)
CR4NN3RZ 2 years ago
that (chattering sound) is called a pro modified
"waste gate or Blow off valve" wich releases excess air that the turbo is sucking into the the intercooler, that the best guess i could do althoe that spool that the turbo did, its a sign of that motor has balls...
redlinerunner83 2 years ago
the car in this video is the M.I.J performance car for the guys in Walsall I no iv got 2 mates that work there I will highly recommend getting work done there.
kingchaos101 2 years ago
yeah well he didn`t call it, he copied and pasted it look it up on google. i LOL`D
c0dymcgillivary 2 years ago
purple horn? please explain lol
c0dymcgillivary 2 years ago
so how did this guy, or any guy, get 1000hp from a four cylinder engine? I see it but i rlly dont believe it.
pARISsKATERS 2 years ago
its a 6 cylinder dumbass
tylersmallz 2 years ago
just as impressive asshole
pARISsKATERS 2 years ago
use a gigantic turbo.
roflex2 1 year ago
yea bro rb24det 1000hp pretty sweet aye
supersayonbrad 2 years ago
rb26dett, this is a 2.6 not a 2.4 L6
JesseS42o 2 years ago
Looks like the Pennzoil R34 that was in the JGTC, if it is that car it has about 700hp
Circa1990 2 years ago
im sure ive seen this cars engine in a ''hot 4s'' magizine RB26DET
xflow666 2 years ago
compressor STALL,compressor surge is something else entirely, too many cluseless people perpetuate the myth that it is coming from the wastegate FFS
scoop2004 2 years ago
ok ? how is this compressor stall? not being a nobb but compressor surge as i under stood was the turbo ingesting air and not the motor not alowing the air to move (throtle body closed) but the blades still spinning xxx rpm (so you are hearing the blades chop the air) shhhhchaaa chaa chaa sound! there for slowing the compresser wheel down and causeing lag in the next gear.
20PsiNow 2 years ago
It is a "stall" becuase the air that has been compressed cannot go through the closed throttle body so it comes back out of the compressor the wrong way forcing the compressor to slow down (stall) and it makes a nice noise while it's doing so. Compressor surge is when the compressor speeds up due to excess exhaust gas going through the turbine (anti-lag sort of demonstrates this effect, throwing loads of fuel in to build the boost up even though the throttle is closed)
scoop2004 2 years ago
that is a big mother f*cking turbo man
wopkel 2 years ago 23
@wopkel hahaha dumass no its not
Blazerdsx 1 year ago
@Blazerdsx Compared to stock, yes it is.
xioxio38 1 year ago
for all who think that is a "huge turbo" i don't necessarily think that is large at all. take a look at a cummins diesel turbo. they are the size of a basket ball. i think its just a large aluminum cold air fitting that does well. suck in a lot of frigid air. and as everyone know. cold air = good. lol just my opinion don't hate
dman155 2 years ago
ok cummins turbo is not the size of a basket ball it has a 3" inlet! the turbo sucks in air (yes) but what happens to air that is compressed? it gets heated now the intercooler comes in to play and cools the hot air to a out side air temp!
20PsiNow 2 years ago
i was saying the purple piece attached to the inlet of the turbo is made to cool the air rushing past it into the turbo to further cool it.
dman155 2 years ago
Its to direct air more efficiently into the turbo inlet. Has nothing to do with cooling.
rktboy3802 2 years ago 3
This comment has received too many negative votes show
its a vacuum how does it need help directing the air into the turbo. u don't know shit about cars b/c as teh air comes past the aluminum fitting it cools the aluminum and its cold. and as air goes past the cold aluminum. what happens Jr.? st fu and don't negative on my comments i know more about cars that u could imagine.
dman155 2 years ago
Lol don't get upset...It's purely to smooth air flow, Nothing more. So you don't have turbulent air entering the compressor. (look at the front of a aircraft's jet engine. They are always ducted for this reason.)
s04r3r 2 years ago 2
@dman155 LOL you have no glue at all...... it would heat the air up if you think this is for the purpose of cooling air....
Everything in the engine heat soaks and that purple inlet is connected to the turbo ... any idea how hot they are even tho is on the cold side?.
Like "s04r3r" said its just to smooth airflow.
icashADDICT 2 years ago
well from my knowledge of racing motorcycles. i know aluminum pieces are put on the intake manifolds just like those that make the air colder some how. sorry i dont have the phd and can make it sciency for you retards. but i do know what the hell im talking about. and it does make the air colder. ask the poster. ask auto zone, o'rieleys, napa. acdelco.
dman155 2 years ago
"make the air colder some how" ? then ask around yourself if you don't trust us.
right now its 4 against 1, the odds are against you in every way.
icashADDICT 2 years ago
i dont need to go with odds. i've been in racing for years. its not somehow u noob. it just does mayb its teh air that is getin sucked in to the turbo that cools the alum fitting, and well the alum fitting is chilled the air rushing past will be cooled also. it simple racing knowledge and idc about what u guys say for real im done talkin to idiots. it could be 10000 v 1. but i'd still be right. did anyone go to auto zone like i said? or just try ur local repair shop. im not wrong here guys.
dman155 2 years ago
LMFAO....you're the one who said some how.
No idiot what you said only applies to intercoolers. You've being racing for years? and still don't know how things work?
icashADDICT 2 years ago
lol wow...
Jak3Mac 2 years ago
so a velocity stack on top of a carb is for cooling?
S2KandGTR 2 years ago
it's called compressor surge
diwun67 2 years ago
dats a huge turbo
d3zz96 2 years ago
is that the carbon amuse gtr? soo cool
(by the way, it is 550 hp)
bboyrb26 2 years ago
i know my fair share about cars specially forced induction engines and man i can tell you straigh of the bat that not a 550hp car its more impossible that an r34 with such tuning and such a big turb like that one only has 550hp my friends bmw m3 puts out 580rwhp and his turbo is not that big lol but im jst saying if it does have 550hp then it def not tuned and if it wasnt tuned it wouldnt be considered a well prepared race car at leats 680hp+++
perpetual774 2 years ago
or 1000bhp as the video says that i belive with a turbo that size ... pzz if you feel im wrong i would like to hear or read ur wat u have to say and please no bullshit threatening demeaning 12 year old comment keep it clean keep it fresh
perpetual774 2 years ago
no its not the carbon amuse u mong, does it look carbon?
by the way its not 550bhp, its a race car spec so its 600bhp to 800bhp
trevcannon 2 years ago
HUGEEE turbo.
preludedude123 2 years ago
Yes they do, under partial throttle near the threshold boos pressure. When the wastegate spring keeps opening and closing rapidly. This is just turbo flutter though...
freakyice368 2 years ago 2
wastegates dont chater
nickjgriff 2 years ago
Nice showoff valve
N1ceGuyEdd1e 2 years ago
MIJ Performance Skyline ,, Shiit Thiing ,,
muhammed2012 2 years ago
The purple thing is just a BIGGER AIR ENTRY lmao
0wnage1111 2 years ago
its called a velocity stack
blackdc4 2 years ago
sick of this feckin car! copyin the sumo power skyline, penzoil colours, and its not even road legal! piece of shit!
adepuntogt 2 years ago
ignorant retard
andrewm1991 2 years ago
always wanted a nismo skyline
demoskittles 2 years ago
Are u Guys serious? You can clearly see a Turbo in this Vid ....
Allibeba 2 years ago
you sure its a turbo???
Poodak420 2 years ago
i lie the BOV on that thing,its sexy
BOSSYTS 2 years ago
that purple piece is not a BOV its just a piece to give looks to the compressor inlet of the turbo
rotaryturbo88 2 years ago 3
i didnt say it was dumbass...around :20 he revs the engine and you can here the bov....im not stupido____O
BOSSYTS 2 years ago
wow for you to jump out calling names makes me realize how immature you are. i was simply just stating something assuming you were going on looks, not just going off the basic sound of a Greddy BOV sounds like every other one i have heard out there.... SEX .... think not
rotaryturbo88 2 years ago
sorry but did you even see the whole video before you commented on my comment?cause its preety noticable that the car has a bov in the video....plus to challenge my knowledge with cars kinda made me mad:D
BOSSYTS 2 years ago
yeah i just dont think the wooshing bov was sexy sounding so therfore i thought you were going off looks but everyone has their own tastes. and yes i was very sure a 1000bhp turbo car of any kind has a bov lol very costly not to
rotaryturbo88 2 years ago
lol, compressor surge. Youtubes new buzz words.
MindCurrupt 2 years ago
mate its a turbo
jim141994 2 years ago
Mate, im quite aware its a turbo.
MindCurrupt 2 years ago
This is what happens without a blow off valve, air comes through the front of the turbo slowing it down and killing off boost. In high horsepower cars, this is actually the most effective way of killing boost between shifts, if the turbo spins too fast and makes to much boost going into another gear....goodbye head gaskets.
ice788 2 years ago 3
now, dont make fun of my lack of turbo knowledge but, why would u wanna kill kill in between shifts? wouldnt u wanna keep it up so when u hit the next gear the turbo doesnt have to wind up again? and where on the turbo/engine is the blow off valve? again, no bashing me. i admitting my lack of knowledge on this and seeking info. at least im not a poser, right?
ktmyamaha01 2 years ago
Well, if the turbo remains wound up at let's say...25 psi going into 3rd gear from second...then you'd have way to much air and not enough fuel for the lower rpm range you're engaging in, it leans out. This will cause overheating, and imminent engine failure. Blow off valves are located on the turbo compressor, while waste gates are tuned to only let a certain ammount of PSI (boost) into the engine, those are located between the exhaust manifold and the turbo compressor.
ice788 2 years ago
I think you are trying to refer to compressor surge, and If you are, that's not what it is.
jaindls 2 years ago
no, not compressor surge...or Axi-symmetric stall for motor heads out there. Although in that senario i've estalblished, if you did have a HUGE turbo on a small engine, then it could cause compressor surge because there isn't enough airflow going into tiny cylinders, which causes air to flow backwards into the turbo...and BAM the turbo will pittle out until the psi is back to operational standards for that engine. I was basically stating what B.O.V. and wastegates do, and where they go.
ice788 2 years ago
O okay. I got confused.
jaindls 2 years ago
You sound like you know what you are talking about. WTF are you doing commenting on youtube? Don't you know that youtube comments are only for the misinformed and clinically retarded?
Plur307 2 years ago
I think we just became best friends! hahah
ice788 2 years ago
The irony...
propaintballa 2 years ago
Looka kinda slow if you ask me?
Ryanpusslover 2 years ago
Why wont you challenge it than, you probably can beat it. Puts some money down.
IAmSamThatIAM 2 years ago
lol I was joking fucker
Ryanpusslover 2 years ago
compressor surge man... not good for the turbo and engine...
19mazda90man 2 years ago
its not bad for the engine and you wont ruin your turbo because it gets compressor surge
equoowe 2 years ago
mmm, comp surge. Dose it bro :P
nismofreak34 2 years ago
I am taking my Smartcar and going home.
modeowns 2 years ago
its a wastegate dicks and it not compresion surge
pledge467 2 years ago
Wastegate dicks?
produKtNZ 2 years ago
It's compressor surge you imbecile, kinda search google you half wit.
Dannyd2134 2 years ago