So without a blow out valve, the car will laugh. With the blowout valve, the car will sneeze??

@koko61336

4 жыл бұрын

fuck this comment i love it

@moodyf2966

3 жыл бұрын

I like it when it laughs

@starkz3965

3 жыл бұрын

I wil remember this comment for a long time

@MahilalPeiris

3 жыл бұрын

Hahaha dude

@gasperbucinel

3 жыл бұрын

Yes.

Finally someone who actually understands how this works. Thank you CT.

@mrmidnight32

5 жыл бұрын

ali p how does he understand it? He just explained it’s ok. He showed no examples or reasoning as to why. Having 20+ years in machine and car shops and understanding tolerances and bearings back pressure under load or not is still pressure. Which is going to put force on the bearings which will wear one direction more than another. This wearing the bearings to premature failure. The whole it wears under WOT but not when it’s no makes no sense. Either way it’s back pressure on the turbine and bearings. So either it does or doesn’t at all.

@DanSlotea

5 жыл бұрын

Manufacturers understand better. And they put valves to protect from surge. Thank you manufacturers.

@renners9636

5 жыл бұрын

Dan Slotea not true, they are mainly in place to prevent the noise and due to they fact that many standard hot wire/thin film air flow meters could not measure the direction of air flow, and as surge when surge occurred the air flow meter incorrectly measured more air than was being consumed by the engine, causing a temporarily rich tune and emissions problems. The Anti surge was just a happy coincidence, many early turbo cars of the 80s had no bov.

@NoGrip

5 жыл бұрын

@@renners9636 Many 80s cars also had Brown interiors, solid rear axles and were absolutely terrible. It doesn't make them correct. Also that was like 37 years ago, technology changes. Look at Borg Warner.

@renners9636

5 жыл бұрын

No Grip can you be more specific in your argument against me? My statement was very simple and only covered one aspect, that the main reason cars were initially fitted with blow off valves was not to protect against *damage* from compressor surge itself but to stop incorrect fuel readings under surge conditions and to stop annoying noises that most drivers would not expect from a normal car. I made absolutely no claim of anything being better, the implication of me mentioning some 80s gasoline cars not having blow off valves was to validate the 100s of thousands of turbochargers that have lived and live without being destroyed by compressor surge, I never advocated it as correct, but simply noted in the case of many oem cars that it is was a design that did not doom the turbocharger to early mechanical failure. Manufacturers are more worried about possible emissions and noise issues than a few turbos failing sometime after warranty is up. Maybe turbos running 30+psi are more susceptible to wear I couldn’t say.

Thank you so much for this, please do keep making these types of videos where you explain common misconceptions. Superb guys

Wow! So like half of us thought flutter was just a fancy sounding blow-off valve haha.

@nate1491

6 жыл бұрын

James Russo that’s what has made me so pissed! All these “tuner” 600whp subies talking bout “it’s a BOV”

@e34boat88

6 жыл бұрын

maybe 10% its clearly not bov. BUT some of the turbo cars that makes flutter noises does have bov but it only realeases part of the boost so the sound is kinda mixed

@midniteclub1654

6 жыл бұрын

some people wind there blow off valves up tightly so it surges on low boost and opens the blow off valve on high boost

@GlassTopRX7

6 жыл бұрын

Yep my car flutters when I roll off in normal driving and chirps when I'm getting into it. Just depend on much boost there is before lifting.

@TheCarBro

5 жыл бұрын

GlassTopRX7 how tight is your bov set?

Thanks! I was so worried with my quad turbo charged & dual supercharged Civic Si, with stock internals, would break all my turbos.

@e34boat88

6 жыл бұрын

ErwinSchrodinger64 i wish this was trye and you had mad vids about it bruh

@ErwinSchrodinger64

6 жыл бұрын

This is an automatic message to notify anyone that ErwinSchrodinger's quad turbo charged & dual supercharged Civic Si, with stock internals, had so much horsepower and so fast, it became a time machine and he went back in time.

@e34boat88

6 жыл бұрын

ErwinSchrodinger64 all that was possible due not using bov

@DhirC35

5 жыл бұрын

🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣

@DoktrDub

3 жыл бұрын

A civic can handle 1000 hp on stock internals easily, fax

That R33 at the end was purely demonic

@KiNG-fr5ib

2 жыл бұрын

agreed

Been running no BOV on my single turbo 1JZ for near on 3 years now. Makes 20+psi on e85 reliably all day every day without issue. Why fix something if it isn't broken?!

@jarhead1145

6 жыл бұрын

You'll be fixing it a lot sooner than someone with a BOV.

@e34boat88

6 жыл бұрын

Archer old turbo buicks with blow thru system didnt have bovs and you can still find perfectly working ones with the same old turbo. so after 25+ years and thousands of miles and still no broken turbo...

@jarrusjenkins

6 жыл бұрын

Also to note, WRC cars don't use BOVs either because (believe it or not) they slow the impeller speed down more than without one causing more lag ;)

@assi2assi

6 жыл бұрын

as far as i know the bmw m6 GT3 don´t use a bov either and you can hear the flutter when they let off the gas ^^

@burakoshimazaki

6 жыл бұрын

andrenegwer says the guy parroting what he saw in a video from a very respectable, but less experienced member of the community. They are much more experienced experts who will tell you the opposite. What he covers is is mostly true but you still cause premature wear without a valve regardless.

I actually like the flutter sound much more than the blow off one. It just sounds more epic :)

Hands down the clearest explanation for this. Thanks guys.

Wait so thath means we can have sututututu ?

@Villyum

5 жыл бұрын

Stoteliu Siaubas that’s what I’m hearing.. throwing out BOV now..

@sbr7018

4 жыл бұрын

BRAABABABA STUTUTUTUTU

@TennesseeBass849

4 жыл бұрын

Been saying this for years and no one would believe me

@randiey95

3 жыл бұрын

only low boost

@TheShamRockii

3 жыл бұрын

@@randiey95 define low boost because im thinking if 15 psi qualifies🤔

UK:CarThrottle = USA: DonutMedia Bitvh who do you love?

@faisal3398

5 жыл бұрын

Who you calling a bitch?! bitch

@benjaminofuasia9236

5 жыл бұрын

LMFAO the yg reference is great

@bonk1049

4 жыл бұрын

Both

I get the best of both worlds with the Tial Q on my ms3. Spring in it is a -12 psi spring, and the vacuum in the intake manifold takes about a quarter to a half second to go from positive boost to -12 vacuum, and therefore it takes that long before the valve opens after boost. I get this lovely "stutu-schhhhh" noise from it and I absolutely cannot wait until I have a Garrett GTX2867R gen II on it and can hear the noise a 9 blade compressor makes vs the k04 6 blade.

Thanks for making this video because people that never owned a turbo car comment and try to act li,e they know their shit.

@garren3498

6 жыл бұрын

my first turbo car was a -99 saab 93 2.0t and i tuned it from 150 to 270 without a bov, and its still fine and it has 320000 km on the clock!

@raivis923

3 жыл бұрын

@@garren3498 hows ur saab holding lol

thanks CT that cleared my confusion. Now I can have highest settings during acceleration with no flutter , but only after you lift the throttle-closed.

of course there's a VL commodore...

@fazzer3519

6 жыл бұрын

why wouldn't there be?

@Kj16V

6 жыл бұрын

aka. Dose Mobile :D

@7X1..

6 жыл бұрын

Up the Vl and Rb30.

@Deluxe556

6 жыл бұрын

haha love my vl and I was surprised it made it into what I assume is an american made video but almost all turbo vls are bound to be flutter machines. Mines soon to join the turbo charged crew ;)

@noahv1916

6 жыл бұрын

VL most over rated car in Australia pisses me off but I love the rb but just so over rated compared to batta

This finally answerd my questions. Thanks guys. Subscribed.

Car Throttle THANK YOU!! At fucking last somebody got it right!! Seriously: Utmost respect to you for actually RESEARCHING this subject and not just repeating what every forum / back of BOV box said.

As a Machinist/Welder/Fabricator/Mechanical Engineer, in 2004 or there about's, I got to work on a diesel semi-tractor that was attempting a Bonneville world speed record for that class. The diesel engine was turbocharged and producing 75+ psi. The turbo stall was discovered with a high-speed camera aimed at the fan. This wheel was coming to near complete stop and re-spooling. The solution was to add a Roots Blower to the mix to positively insure that the flow from the turbo was moving forward. This semi was geared so tall that it needed another tractor to push it to 75 mph just to get going in first gear.

@wallcouldtalk

3 жыл бұрын

Well, this is the coolest thing I've read all day. Funny enough a day that someone was trying to tell me how bad compressor surge is, which is why KZread suggested this video to me. Do you happen to remember who or what company that was? It wasn't Cat with the race C10, was it?

@brianhoefer7148

3 жыл бұрын

@@wallcouldtalk Search KZread for "Ye Old Dragon".

@DriftNick

3 жыл бұрын

How was the turbo coming to a near complete stop?

@strider5119

Жыл бұрын

Got a link to a video of that? cause it sounds bullshit to me. Turbos spins at tens of thousands of rpms, it's not going to stall and come anywhere near a complete stop in between gears. That's an outrageous claim

If you're running the correct sized turbo, intercooler and piping for your setup, a BoV isn't necessary, the only thing a BoV MIGHT, and I stress the might, help with is eliminating lag (if you even have any) between gear changes as the turbine of the turbo won't slow down as much with the surge of pressure when the throttle blade is closed. As for the increased wear on the turbo when not using a BoV, for every study I've seen saying that it wears the turbo quicker, there's another that says it won't! :/ From my own experience, the only benefit I've noticed from a BoV has been reducing lag between gear changes. I put something like 15000 miles on a mk3 Supra 2.8 single turbo I built back in 1999 without a BoV then after some advice from a mk4 Supra owner, I fitted a BoV and it did help to eliminate the lag I was getting between gear changes. I ran the car for 2 years after that (must've been at least another 20000 miles) without any noticable signs of wear on the turbo, I sold the car to a friend who ran it just over a year before smashing it and one of the few things that was ok to salvage was the turbo!

@DoktrDub

3 жыл бұрын

Yeah, hear changes and when you close the throttle before reopening, I have noticed slight differences in lag reduction with a well placed BOV, as for longevity... I don’t think it’s that dramatic of a difference with our without as long as your system in balanced like you said

@turbopanda7012

3 жыл бұрын

yes

@BigTurboLos

2 жыл бұрын

good fix for this is flat foot shifting 😂

@theposerhoser

Жыл бұрын

I'm under the impression you're mistaking the purpose of a blowoff valve and a wastegate. The boost control solenoid in conjunction with the wastegate and recirculation valve is what should maintain boost pressure between shifts, a blow off valve in theory is only there to blow off air pressure when you come off throttle

@amorag59

7 ай бұрын

@@theposerhoser No he's correct. A wastegate is only there to prevent overspeeding of the turbo. A recirculation valve has a very similar job as a bov, a bov vents to atmosphere and a recirculation valve vents back to the inlet of the turbo. Not sure why you added the wastegate to the mix.

Honestly, thank you so much CarThrottle.

Thank you so so much for this video !!!

Thank you for explaining this great video

It is too good. Very simply explained.

yeah the vl, great video, and also like all the other educational videos, keep it up👌

You’ve just convinced me to put a cover plate on my blow off valve. Congrats.

Thanks for clearing that up

Could you do a video about blower idle surge? I never fully understood the concept behind it. Thanks!

@g__wizz

5 жыл бұрын

same concept. to much air is being pumpd, vs what is being used.

it's obvious that anyone who says that hasn't driven or even heard a turbo car IRL.. good vid man.

Another thing - a lot of 3 an 4 port wastegates sound like // similar to open throttle compressor surge under heavy load, especially open dump(s). It's much different though if you compare side by side

I could be wrong but having a bov does make for much quicker boost response if you are going to be on and off the throttle frequently as in road racing,time attack,off road rallying and auto cross.

Thanks for clarifying 😊

I had seen some comments about that and I never did understand how it could spin the compressor backwards, turbochargers are essentially non-postive displacement pumps and a fluid pushed backwards through one would be extremely inefficient at causing any movement of the compressor wheel.

Thanks for this now I can run no bov on my new project

Had my own turbo spin the nut off the compressor due to closed throttle surge and seen others do it too. It is all good if your turbo runs a left hand threaded shaft but the ones i have seen undo are right hand threaded. The turbines inertia due to weight is greater than the compressor wheel so it tends to back off the nut on the compressor wheel when there is a differential of forces applied. Cheers.

@S.ASmith

2 жыл бұрын

knock off garrett and BW moment

@strider5119

Жыл бұрын

Got proof that it was specifically compressor surge that caused that? Cause I have never heard of that happening, ever lol

Pushing 24psi no bov/dv for atleast 6 months daily driven. No issues yet. It makes sense that the free spinning turbo can chop the air with reverse pressure with minimal wear to the bearings/shaft because of its free spinning state.( whatever exhaust flow from the engine while shifting wouldnt be nearly the pressure returning through the intercooler) I don’t understand why so many others preach its pre detonation of the turbo?

This is super helpful

BRB going to install a heavy ass spring on my N54 Blow-off Valve because I love that flutter sound.

@Salvnyc_

3 жыл бұрын

What bov you using on your n54?

My a4 sounds like stustustu when i installed a dv, so is thr sound bad every time i let go of the throttle o ly?

thank you so much, now my question is, does the bigger the turbo mean more flutter or does it matter?

There are some BOV with an internal max pressure bypass. Stock Subaru STI BOV does this, at least the older ones opens at about 23 psi. For those wishing to run higher boost on stock BPV, they modify this safety check and boost higher. Not sure how it helps with surge though,

Thnx for the clarity, but what about diesels w/o a throttlebody?

Yessss finally. I argued with people all the time about this, glad someone finally makes a detailed video explaining the differences.

Already knew, but it's nice to see someone else who doesn't believe the forum ninjas. For everyone who isn't sure ; Blow off and recirc valves only help stop compressor stall on over run/closed throttle. Usually vacuum operated, though I did see a rather complex electric set up that was supposed to keep it spooling longer. The best way to do that is antilag, but that's the easiest way to shorten the life of any turbo, but so much fun.

I only learn from cartoon example, great video!

2:37 the subtitles say "Music" when there is the BOV sound 😂

@olivergodfrey2159

6 жыл бұрын

Guten Tschüss my favorite genre of music😂😂

@yuki_is3007

3 жыл бұрын

They are not wrong

Great video thanks ... might be worth doing one to explain why BOVs are pointless on turbo diesels ;-)

@drummonkeystuffuk1875

3 жыл бұрын

Well going on my car engine - it has no throttle plate. and is a deisel turbo, still get some nice flutters though when off thy gas!

Ok so i have a tune of my audi, only apr stage 1 93 octane, and my turbo does this after letting off throttle after a pull, or sometimes a low speeds randomly, but it didn’t used to do this on the tune so just confused , i mean i love the sounds, just debatable whether its bad or not

Turbos are great.

So my 2014 Audi A4 2.0T Quattro does what sounds like an open throttle surge. I do have a cold air intake so it can be heard very clearly under heavy load. What do I have to do to fix this?

There can be surge with wide open throttle as well.... If you mismatch the compressor wheel with the engine flow demand. Its not the air that is trapped. Its the compressors wing stall that makes the fluttering noise. You can also have surge in airplane engines as well and it vibrates in similar fashion.

So if it’s installed correctly, do you still need a blow off valve? Because if you have a blow off valve you won’t get the closed throttle flutter, correct?

Thank you. I’ve been saying this for years

so If i install a DV+ blow off on my focus st and make the bov spring tighter I can have turbo flutter sound and have no issues with the turbo what so ever?

My GTI with K04 started to make this close throttle flutter after stage 1 (300hp 440Nm) , first thought that it's DV, changed but still same sound..

Compressor surge is compressor surge. It doesn’t make it any less damaging that the throttle is open or not. It’s still trying to push air freely that it can’t. This causes faster bearing wear because the off centering torque and vibrations.

@strider5119

Жыл бұрын

LOL. One is definitely more damaging than the other. Closed throttle is simply air between the turbo and throttlebody escaping back out the turbo. Open throttle compressor surge is doing the same thing, but while the throttle body is open. Meaning you're trying to force more air into an engine that can't make use of it, likely because the turbo size is mismatched. Open throttle compressor surge is definitely an issue.

@fulano787

Жыл бұрын

@@strider5119 you’re saying “open throttle is an issue” like closed throttle is not an issue lmao. It has nothing to do with mismatched turbo size and everything to do with wastegate settings and control on open throttle while closed throttle has nothing to do with wastegates and everything to do with the use and settings of dump/ blow off valves. Remember, we’re talking about compressor surge here. The max turbo spool is controlled by the wastegate while the release of pressure after the compressor is released by a BOV, Recirc, Diverter or Dump Valve (different names and routing but solving the same issue) during throttle closure. What I believe you’re talking about and getting confused about is over boosting. Compressor surge is from the speed of the blades being too high for the amount of airflow at the time which in turn makes the blades lose “grip” on the air. This causes damaging vibrations and faster bearing wear by off centering… well, I already explained that.

@Mr.Wongburger

Жыл бұрын

​@@fulano787 there is a difference. Open throttle the turbo is actively trying to make more boost. High boost pressure hitting high boost pressure trying to escape through the compressor puts massive strain on the thrust bearing. Closed throttle the turbo is idling, there is a pressure difference from the compressor that is lower than the pressure coming back at it.

@fulano787

Жыл бұрын

@@Mr.Wongburger yes, compressor surge is different. No, it does not happen at idle.

@Mr.Wongburger

Жыл бұрын

@@fulano787 As long as you understand that during open throttle compressor surge, you are trying to stuff more air into the engine than it can take. That is bad compressor surge and is what damages the turbo. High boost trying to push against a wall. Closed throttle means the engine is no longer making boost, so the turbo is no longer pushing, the boost it was making can not be higher. This means that the air escaping is lower than what the turbo makes which is okay because turbos are designed to handle specific boost pressures. Normal boost pushing against vacuum.

Ran no BOV on 240sx KA-T it felt like a better turbo response not to have a BOV, because when I'm off throttle the would turbo flutter for around 2 second. So I guess for those 2 sec, it's like I have reservoir of boost ready to use. So If I opened the throttle within 2 seconds after closing the throttle the boost would just shoot back up to the boost limit almost instantly.

so my intake tube came off my 2015 sonata and the turbo now makes a flutter sound but its not stu tu tu like we hear on supras and shit, its more of a mechanical chop sound :l anyways its on waranty but i wanted to know how to make it stututu not chopchopchop lmao.. :P so any answers help, some say add a adjustable BOV and have the spring tention tight.. any suggestions?

I know I’m very late, but does anybody have know where to find the original of the Sliver R33 dosing at the end?

then how come I lost all my chu chu noises when upgrading to a larger turbo? recirculate blow off valve is also installed before and after the upgrade.

So i can keep that stu stu stu that puts that smile on my face☺️ yay!!!

Mine doesn’t make a flutter noise but it does sound like it’s clogged cuz when accelerating if the turbo works at 100% it whistles a little sounds clean tho Other time it makes sort of choke noise like chckk and the turbo lands flat on its face usually occurs after 4000 rpm but occasionally at 3100rpm as well the turbos only 98k miles old I do have a P0299 code that goes away after using degreaser for a few days even up to a week! And there’ll be no problems until it clogs back up Could this be an oil intake issue? I really hope so cuz it’s only $25 for the part haha while the turbo could range from 250-700

So prevent open throttle compressor stututu you put on a big wastegate right ?

Is deleting my Electronic bov will b a problem? Audi a3 tfsi 1.8

Thank goodness I had this saved cuz my dad did t believe me when I told him it wasn't bad to not have a blow off valve. This video amongst much more research finally proved to him it wasn't bad for my car which I bought myself that he has never and will never need to put money into

@travisburgemeister313

4 жыл бұрын

As a father, I will act like that, because it makes my kids want to prove me wrong. It's a kind of test to see what lengths they will go to prove what you think is real. Also you learn more from doing so rather than not having to. Have fun out there in your turbo rig. 🤙

A blow of valve will work at WOT they open at whatever PSI they are calibrated for regardless of throttle position

Why the re-upload?

So I see a lot of Subaru’s that flutter during boost, does that mean it’s bad for them as well?

I have a recirculating valve. do i need to replace them with bov?

Learn something new everyday when you’re willing

Its scary to me that people don't actually get this as it's the most BASIC understanding of how a turbo works. Think about that for a while. these are the same people that yell ''RICER'' if you made a modification they don't approve of.

@grantts7

5 жыл бұрын

StreatBeatsAudio Subwoofers basically people who call themselves car guys but have no clue at all

@bestleesinna7702

5 жыл бұрын

It sounds to me like you're just band-wagoning, because you aren't really providing reasoning behind your argument. You're simply persecuting. Compressor surge fundamentals are not the most basic understanding of how a turbo works. That's usually stage 2 or stage 3 in understanding a turbine's mechanics. An inexperienced person who has just finished their build wouldn't likely be aware that their blow-off valve serves purpose outside of alleviating pressure in charge pipes and intercooler piping/intercooler. If they heard open throttle compressor surge for the first time, they might just assume it's cool turbo noises and functioning as normal. Once they've blown the seals and bearings out of the turbo, then it might be something they learn. Also, some of your statements don't even correlate. You're a bit all over the place, which is what leads me to the conclusion that you're simply here to make others feel bad to make yourself feel better about your own ignorance. I'm not attacking you, but I would ask that you not attack others. If you think you have such a complete grasp on turbo-charging, perhaps you should do some research into intake harmonics and then come back and comment. You still have a lot to learn as well. Everyone starts somewhere. Learning is a process. I've spent years of my life building turbo'd cars and still learn things every day through trial and error, other people providing me information and tips, and research and equations. If you assume compressor surge is a fundamental pillar in understanding turbo-chargers, you've never seen a 16 year old driving a boosted Civic with no blow-off valve, no intercooler, no waste-gate, and no BCM or piggy-back. Turbo-charging is more complex than you are for probably prepared.

@NoGrip

5 жыл бұрын

@@bestleesinna7702 lol

@the_modfied_car4903

4 жыл бұрын

@@bestleesinna7702 turbo flutter does not wear the turbo out due to simple fluid dynamic laws

@bestleesinna7702

4 жыл бұрын

@@the_modfied_car4903 do you understand how bearings, friction, impact and directional force work? Cause what you said makes me think you don't. Turbo flutter is puts force on the fins in one direction, abruptly ceases that energy, which causes secondary forces to commence. This is a back and forth motion that wears down bearings and shafts. A smoother change in pressure results in less violent motion and reduced wear. You don't know what you're talking about. Fluid dynamics are all fine and dandy in theory but mechanical elements are your point of wear. Anything that moves, wears. You combine the immense heat and rpm a turbo operates at and you get accelerated wear. Not to mention the difference between double-sleeve, sleeve-bearing, and dual-ball-bearing turbos. Turbo flutter causes wear. Arguing against that isn't ignorance now, because you should know better. Arguing against it is stupidity because you're arguing against physics. This kind of wear is demonstrated by the price-hike of dual-ball-bearing turbos despite them being cheaper to manufacture than other varieties. It's because those forces don't wear them AS much, but still do. I just...I can't even talk to you right now. If you don't know something, ask. But don't try to teach people incorrectly.

How do oem boost control solenoids eleminate the closed throttle surge?

Soooooo is it as simple as me ordering a bov blanking plate and thats it? Or does one require a tune?

Closed throttle surge still hammers thrust load back and forth. I've never heard Anyone say the wheel can turn backwards, that's crazy. Closed throttle surge is that last exhaust clearing the turbine with the compressor having nowhere to compress. The thrust load of the compressor is applying force towards the center, the turbine is also applying force towards the center. They cancel each other out in normal operation. When the pressure builds high enough in the charge pipe that it has to escape past the compressor it JAMS the whole cartridge towards the compressor side. Jam is the absolute best way to describe it. As soon as the pressure is low enough in the charge pipe it jams back to the center, also immediately exceeding the threshold and jamming the cartridge again. So yes, closed throttle surge shortens the life of the cartridge. Yes, it can also break blades on the compressor wheel although it is not likely in a hot street setup. When the charge pipe hits max pressure in a 3 BAR + system, the load on the wheel is incredible. If you think about the Hellephant 426 with the 3 liter putting it 1000hp to the wheels. It is using a modern high efficiency positive displacement supercharger. It is using somewhere in the neighborhood of 350-400hp to drive the supercharger at peak. Turbos on the same motor at the same boost will make 1370hp give or take. That's how much force is on those little tiny compressor wheels. To be able to heat air up 150-200 degrees flowing 1000cfm is extreme kilowatts of power compressing. As you said, blow off valves aren't designed for open throttle compressor surge. They are specifically designed for pressure discharge in closed throttle. Why make them if it is not necessary? Rhetorical, because smashing thrust load and taking it away 6 or 7 times on a 13mm bearing with 180 kilowatts of force on it is not good for anything. Especially in a manual gearbox car where you are constantly letting off the throttle.

@Shreddylife

2 жыл бұрын

Been running a closed bov for 6 years now with the same journal bearing turbo and it still has no shaft play what so ever. 😄 Closed throttle turbo flutter is not bad unless its on open throttle and surging like the uploader said

@Mr.Wongburger

Жыл бұрын

His explanation is correct. Though it matters how much boost and what the turbo journal bearing setup was designed for. If you are boosting 30 psi on a setup designed for for 15-20 psi, you will definitely shorten the thrust bearings life span. But a bov isn't the perfect solution either. There will always be thrust bearing strain, bov or not. The bov isn't releasing all the pressure fast enough for closed throttle pressures to not affect the thrust bearing. It does minimize it though. Modern turbos are built different. Better materials, billet wheels, better oiling and cooling. I think the people who are giving their own anecdotal experience should give others a better idea on how turbos are handling flutter these days. Only downside I've come across is lag.

That last surge tho :o

Hey! I have a question. I’m new to the car scene, like brand new and I need help knowing the difference between a radiator, and a intercooler and what the pros and cons of each are.

@DoktrDub

3 жыл бұрын

I’m guessing you figured it out since this comment is 2 years old? As in that a radiator and intercooler are for two different systems, intercooler cools air from the turbo for the engine, radiator cools coolant/water, for general engine cooling, I said cooling so many times just now lol

@strider5119

Жыл бұрын

LOL. please tell me you figured this one out?

Does it means if no blow off valve in the system there will be more turbo lag because the turbine had slowed down so much when throttle valve closed?

@jockobo

6 жыл бұрын

Anas Takiyudin it's really not that bad at all

@arekb5951

6 жыл бұрын

I'd say it depends. If you're letting off the throttle for a brief moment (like changing gear) residual pressure that haven't gotten out through the turbo yet will help to build the target pressure faster, but if you let off and leave it for a longer time (so the pressure can completely escape), then yes, rotor will take more time to spool up. Nevertheless, in both cases, the differences are barely noticeable.

@MV60

6 жыл бұрын

Surge is better for response as the intercooler still has a charge in it that it otherwise has not dumped all out through a bov.

@MV60

6 жыл бұрын

Lag is actually the time it takes for the pressurised air from the turbo to make it to the manifold. A top mount will have less lag than a front mount typically.

@MV60

6 жыл бұрын

Ok, the hot side is the turbine, the cold side is the compressor. They spin at the same time being linked with a solid shaft. Ok moving on, what you're probably trying to describe is boost threshold where there is enough exhaust gas to spin the turbo to the point it produces positive pressure. Turbo lag as I said above is what happens above that boost threshold.

Ok so we have done this to my sisters 2020 veloster n performance package and I seen that bov block off plates arnt safe for journal bearing turbos but are safe for bearing turbos so Is it safe to do a bov block off plate on journal bearing turbos?

@xXCODkingProductions

2 жыл бұрын

With some newer cars they have a recirculating blow off valve which the car is tuned for. So id be careful for your application. But no matter the bearing it doesnt matter but a ball bearing turbo will always be better simply because its not relying on oil pressure to stay affloat. Ive been stututing on my journal bearings for 2 years fine

hx on my rb for years now no bov com surge can be elevated with either flat shift enabled on aftermarket eco and or supercharger bypass valve this also bypasses surge at wot :)

Wait.. so if it flutters straight after you take your foot off the accelerator it doesn’t harm your turbo? I’ve been searching for a video and this is the closest that’s made any sense

Ive been running my Big turbo A4 for a few years without a BOV. zero shaft play.

ive heard on smaller and older turbos compressor surge can cause more damage, if i blocked off my recirc valve on my 98 wrx with the stock td04 turbo would it do much damage?

@matthewlock5833

3 жыл бұрын

Older turbo's are actually less susceptible to damage due to not using ceramics or ball bearings.

Can I get a link to the last video?

so without a BOV is okay like on a 2JZ-GTE like on a supra without it okay if I throttle and I don't hear it when I throttle and when I do it bad is that correct

@strider5119

Жыл бұрын

if you hear it while accelerating it's bad. If you hear it when you lift your foot off, its fine

Can you not setup a blow off valve so that it opens at a set boost pressure much like a waste gate? Then you could have the blow off valve venting excess air volume at WOT, which should stop the surge. I'm not familiar enough with turbos to have encountered this issue, so please enlighten me.

@STINKYPOOPOO42069

5 жыл бұрын

Not sure if you are still curious, but if you install a flow control valve you can adjust it to where it becomes a delayed blow off, gives you the turbo flutter we love and then relieves pressure. It's cool to play around with and you can adjust it as you would an aftermarket bov, AND you are able to do it on a stock BOV

So i got a question, sorry about my bad english. I installed a closed air BOV that means the air is going back to system/turbo. My car does that stutututu and it's really really good! The question is im destroying my turbo like that?

@strider5119

Жыл бұрын

no

About time people learn..

What does the light whistle of his mean

Thanks for addressing facts, there is so much misinformation online it’s unreal, magazines still publish about compressor surge to try and sell turbo smart BOV’s lol, fair enough that if you have higher boost and too much trapped air then extra resistance against the impeller over a longer time frame may not be the best thing, but the whole generalised “compressor surge oh no flutter noise when closing the valve” is generally more or less BS :) Little do they know when they buy a BOV and hear the flutter even louder potentially, because you are just allowing a more free release of air making it easier to hear in most cases, because reducing flutter is not the design purpose of a BOV

Open throttle compresser surge, couldn't that also be called boost creep, or is that only related to not having a big enough BOV

The car at the end scared the shit outta me XD

Can you run no bov with twin turbos?

A guide how to produce that sound from your turbo would be the best !

@strider5119

4 жыл бұрын

I could explain it to you, it's very easy

@benjaminkrasznai2282

3 жыл бұрын

@@strider5119 can you explain it to me? Would be helpful!!

@strider5119

Жыл бұрын

​@@benjaminkrasznai2282 sorry, only just saw this. You just need to either block or delete your factory bov (or equivalent). Also blocking the vacuum line that goes to the bov. Sometimes you can get away with just blocking the vacuum line, but some bov's will still open with enough pressure. From turbo to filter, you want as much aluminium/stainless as possible, no plastic/factory stuff. You also want as free-flowing of a filter as you can get. Eg an aftermarket upgrade or just a pod filter. The sound will vary depending on the intake and also the volume of the intercooler/piping. Some cars sound shit when they flutter, some sound fantastic.

That nasty r33 at the end

I’d assume since diesels have no throttle plate and run via metered fuel injection. Cutting the fuel would be of similar effect for it since there’s no combustion for drive pressure to drive the turbo?

@billymanilli

2 жыл бұрын

yep, pretty much!

I got question. Like most diesel cars atleast one i own (VW golf mk4) doesnt have Blow off valve from factory. But it does not damage the turbo?

@Nebbia_affaraccimiei

6 жыл бұрын

Lukas Juozaitis. Let me know when you see the throttle closing on a diesel

@cibuliux

6 жыл бұрын

Nebbia affaraccimiei ohhh really ;D sorry 😂 my bad

@lazarjanjusevic3

6 жыл бұрын

Nebbia affaraccimiei but is it somehow possible to get this "compression surge" sound from a turbo diesel?

@cibuliux

6 жыл бұрын

Lazar Janjusevic well i never heard it and i highly doubt that it possible

@lazarjanjusevic3

6 жыл бұрын

Lukas Juozaitis. It's possible but i don't know how... Search on yt for 1.9tdi surge or turbo diesel surge and it sounds exactly like this

Thnks man

Good shit

So the flutter isn’t bad for the turbo as long as it only happens off throttle??

Then again, wouldn't a turbo fluttering mean that you'll get excess lag during the next shift?

I have a stock WRX does that mean I can do this?