The guys in this video are idiots tial in general make good shit but most people dont know what they need to make it work in their car. ken and ryan know whats up.
This video is total BS. Tial bov's DO NOT surge unless you have the WRONG spring installed. People need to understand that in order to choose the right spring, you gotta measure your vacuum at idle accurately. Not just with a gauge, but actual manifold vacuum. Once you know your vacuum go to Tial's spring chart and get the correct spring. Just for the record, most WRXs and or STI's with stock cams are always in the range of the 11PSI spring.
@mountainboundwbd1 the surge happens when it cant handle the pressure... it opens and closes the bov continuously like so for the surge.. sounds cool but its not good...
@hijodelpremio No? This is because the BOV is not opening at lower boost pressure. The throttle plate closes, air has no where to go but back to the turbo, the reversing air is bouncing off the blades and can be heard through the intake.
@hijodelpremio surge is the compressor wheel having excess boost pressure being pushed back into it instead of out the blow off valve. That it compressor surge. the blow off valve can be surging... i dont doubt that because thats what it sounds like. But compressor surge and blow off valve flutter are two different things. do your research. TIAL is a top quality blow off valve they also make excellent ext W/G's so do your research.
Uh.. Folks - this is cut from an advertisement for a Synchronic BOV.. Of course they don't want it sprung correctly - they want you to purchase a Synchronic BOV - Which are terrible.. I ran one for a week - and then literally threw it in the trash.. Opens way WAY WAY too often / waaaayyyy too sensitive..
Thats what happens when running the wrong spring...... I only have the 10lbs spring in my integra making 700whp.... When hooked into the vacuum sorce you can practically run them without a spring.. Wouldn't recommend it but I did while waiting for the new spring.... My buddy has a turbo xs BOV on his subi (ej25 w/vf39 @330awhp) and we just cut the spring down slightly until the surges stopped..hope this helps..
That is not surge, it is the sound made by reversion of air over the compressor blades. This will not cause damage to any decent quality turbo.
Surge happens during acceleration when the compressor moves out of it effeciency range and is unable to suck in air fast enough (usually due to an inlet restriction or running too much wasgate duty and overspeeding the turbo), causing it to violently vibrate which can cause damage to a turbo.
@MY05STiUK I have the same problem that starts maybe 3 weeks ago... the sound if awful and My HKS bov is making almost no sounds.... is there a way to check what's wrong any idea would be much appreciated !!! Thanks !
@MY05STiUK Hey man can you explain to me what mods are necessary on the turbo or bov to make the same sound like the scooby have? I would apreciate it very much..thnx..
@NISSMO400R If you want your car to sound like the one if the clip, either run a bov spring which is stronger than required or remove the bov completely and blank off / plug the bov fitting. If you do it the second way, you'll get the sound almost every time you lift off the throttle, as the pressurised air in the intercooler pipework passes back over the turbine blades.
@MY05STiUK By removing the bov and run the engine it won't cause a problem to a stock turbo? or even to the engine? and if i change the bov spring, it must be harder?
@NISSMO400R Depends on the turbo ... some OE turbos are up to it others aren't. You will have to do a bit of investigation on the turbo you are running to see how robust it is. Only problem would be if you are running a MAF which might cause overfueling on lift off.
When you close the throttle (i.e. lift off) the turbo is still spinning and pressurising air, but because the throttle is closed, the air has no where to go (if no bov), so passes back across the turbine blades causing the noise.
Any time I've had to set up a Tial valve you went by vacuum at idle divided in have to ROUGHLY give you your psi for spring pressure. A 12psi spring would mean he's idling at 24in/hg? I doubt it, with that spring it's going to surge no matter what you do.
Darkside said it best. This vid is $hit. Sure they aren't bashing anything upfront but trust the fact that they know what they r doing. My boy with the 50mm Tial on his 430whp Scoob has not a freakin issue with surge at any boost level and rpm shift. Get real peeps! Knowledge...
Knowledge is that more Tial adapters are sold for people to convert over to Synapse than any other BOV. Why would anyone in their right mind replace something that they already spent money on if it wasn't working . . .
Guys, this is a GT series turbo, it will easily soak up off load compressor surge. Rally cars aren't even allowed to run blow offs, and you don't see those turbo's knackering.
@GumGats Rally people don't usually run BOVs, because they don't want throttle lag. They don't care about the turbo's life cycle, because it's a race application. If you want your turbo to last, you have a BOV -- if you want better throttle response, but less life out of your turbo, put in a really heavy spring or close it off (or don't even install one). My friends who do rally have adjustable BOVs (Perrin used to make one, as does APS -- like I have) ... they close them for racing.
That's not the BOV making that sound. But yes, it's very bad...er, it can lead to very bad things. Basically that sound happens when the pressure in the intake pipes has no where to go (either the BOV isn't opening all the way, or isn't working at all) and is forced to go back in to the turbo. That chatter you hear is the air being 'chopped up' but the spinning compressor blades. It can lead to pre-mature turbo failure.
Well, there are different ways. The quickest way that I know of is to properly adjust the BOV. Obviously there are different methods for each kind, and I don't know how to do it on the Tial. But I went through this same thing with my SE-R. But you should be able to looses the spring's tension somehow. That way you'll can visually see that if you rev the car and let off, the BOV will open due to the sudden pressure change. Even at idle, you should get a pretty full sound.
But other than that, it's all about making sure you know how to adjust it. It's pretty easy to find on google.
There could be other issues (wrong spring, etc etc) but I'd bet that the adjustment is just too tight. I base that simply on the fact that it doesn't sound like it's opening at lower boost levels. This is the same problem I had.
No. The BOV should never make that sound. In fact, like I said before, it's not even the BOV making that sound at all. And yes, it IS bad. If you think compressor surge is a good thing, you're a moron.
the spring in the tial bov is not for how much boost you are running. its for how much vac you have. you need to get the correct spring for however much vac you car has and you will be fine. tial is one of if not the best bov on the market.
You would sue someone for making a video about compressor surge? You're a fucking idiot. They didn't say anything bad about it...all they did was show the compressor surge problems they were having. Learn to spell, and form a proper sentence before you insult someone.
Clown your right..I have that blow off valve on my 350z and I got it with the wrong spring and it would flutter that badly...I changed the spring and it fixed the problem.
lol, tial dont surged like that when they have the good spring. my friend run a tial on his gt30r RSX and it don't surge so stop to bash tial to sell your your bov.
I turned it off when the white guy said, "is it blowing off?"..."That's the vacuum, its only seeing like 2 or 3 pounds of boost there is no load on it at all"
boost is load idiot
get a stiffer spring and stfu already
tial issues very specific springs for very specific vacuum draw @ idle.
another failed attempt to make tial look bad, when is REALITY its the owner that makes the product look bad. just like guns, its not the guns that kill people....people.
my audi tt does the same flutter its completely harmless idk about yours but mine never fluttered till after i got my cold air set up and when i put my head next to the intake thats where the noise comes from and it sounds exactly like yours
first of all that is just harmless flutter, personally i have ran these on all my vehicles. you said you have a 12 psi spring. got to the tial website and get yourself a lighter spring. another thing, people also get that from using shitty vacum line that collapses in the transistion to vacum.
Have you checked your vac line for the BOV? If it's too small; that could cause the turbo-flutter... That's hat happened ith my eclipse.. Just seeing if that is the same prob I had or not. That and the amount of vac your engine produces too is based on your bov spring pre-load
why does everytime a bov makes that fluttering sound they think its comp surge. Thats just what the bov sounds like when you only producing a lil amount of pressure. Hint that when you are aroun 10+ it makes the appropriate noise. Comp surge sounds nothing like that....lol
That sound is the prime definition of compressor surge. It's the BOV piston bouncing against the vacuum pressure (due to an improper preload), forcing a small wave of air back into the cold side of the turbo (one might call it a compressor) each time the piston bounces.
This guy's problem is relatively easy to fix. The spring just needs a bigger preload, which will take some testing and finagling.
the bov is not letting air off at 10 psi or 11 this is called a flutter. now then the bov will release when it reaches bout 20 pound boost.
there are some bov's called a double trupmey bov where at small boost it releases through one side where it sounds like a surge but infact it is the bov, then at more revs when the turbo is used more, it goes out the whole(exit) of the bov through the other side of the bov making a normall bov sound.
Yeah tubejoe69 is right the syncronic isnt better. Anyways it sounds better when your driving and pulling 20 psi insted of reving it up because you get no psi when reving no load.
wow, you really need a synchronized blow off valve for that.. :S, id hate to see the turbo start to get some massive shaft play from that compression surge.., you need a 20lb spring if your wanting 20lbs.., that blow off valves doin nothing for yah :(!
you dont know what you're talking about, kid. the wrong spring setup was the cause of it fluttering. the spring used in the bov is not proportional to whatever boost he's running (20 lbs.). his idle vacuum is the determining factor. at first he has a strong spring keeping his bov closed, he should downgrade to a weaker spring to open it easier. synchronic is just doing this to make tial look bad.
OH WOW!!!!! Maddddd compression surge! When the BOV blows off sounds great. Dude that expensive turbo is getting wasted everytime he steps off the gas muhahah!
and what do uz mean by it surges at 5 ,10 psi but not a 15, 20 does it mean at 5 psi it goes back through the turbo and flutters and once it hits more boost it goes throug the bov. what exactly is the compressor surge please?
you've got it right. Depending on the spring you have in the other BOV, it will not open until you hit the boost pressure for that spring. So with an 11 psi spring you will get surge/flutter with any boost level below 11 psi.
Ummm... look again. The BOV is located immediately after the compressor, before the FMIC... LONG before the throttle body, which is located right in the middle of the engine bay (blue coupler above alternator).
Regardless, I don't think it's exactly fair to bash a competitor's product, based on an obviously bad install by an independent shop/fabricator/customer. That BOV is simply in the wrong location.
It isn't bashing. Tial is a good product. But, this is a fair comparison with both products in the same location. 1 should not be at a greater advantage than the other.
Listen, until this video came out. There was nothing published about what was the right spring. You have to thank this video for getting them off their tail and updating their info. And BTW, it is the right spring in there. Or maybe people should just buy a product that doesn't require them to change springs whenever they make a mod, change elevation or one that is designed to stay shut at idle instead of being designed to get rid of compressor surge.
no, just means all the air isn't coming out the bov and some is coming back past the turbo and out the pod. there's no evidence to show it wrecks the turbo.
Your a fucking idiot. Why do you think theres something called compressor surge. There is this gate, called a throttle body, once that gate closes, and there is still air to be discarded of, like he said, the car hits vacuum quickly, causing the the BOV to shut, because it thinks it time to, WHERE DOES THAT AIR GO? Right back to the compressor, aka turbo.
Now, the turbo is running 20psi, i would bet half to 2/5 of that comes back to cause compressor surge. THAT WILL RUIN A TURBINE QUICKER THAN EJAC. No one better post about these things unless you have a fucking clue.
You're an idiot. There's nothing to prove that running no BOV will damage the turbo. In fact, I'd bet not letting the turbo cool down after the end of a thrashing would damage it more then no BOV.
I was having some compressor surge with my Tial as well (Edelbrock PerformerX turbo kit on a Civic), despite using the correct spring. Using a softer spring would reduce the surge, but then the Tial would stay open at idle so this simply wasn't an option. So I replaced it with a Synchronic bov (with filter) which pretty much eliminated the compressor surge.
Amen, thank you for the testimonial. There is nothing rigged on these vids or any intent to deceive. There are quite a few out there with this same experience.
don't do it, the sound you hear is the air hitting the compressor as it goes back. unless you don't mind messing up your turbo's bearing section, put a higher rate spring or adjust tension higher for keeping the bov from opening.
Yeah it's bad news when your BOV makes that fluttering noise.
You Suby boys idle at -11 to -22 vaccum? -25 to -30 here lol. I have no idea if thats good or bad for the motor though. but it's become that low only recently when I put in bigger injectors :\
yeah, compressor surge = unnecessary loss of compressor turbine speed (resulting in increased lag) and premature wear on your bearings. Loosen up that spring or somthing...
A healthy motor on any car should be pulling around -18 to -22in. Hg. of vacuum and like I said you decrease vacuum based on atmosphere. Thats why the Tial comes with the 11lb spring from most everywhere and the other springs are usually sold seperately. There are exceptions, but this is usually the case.
The car was filmed at sea level. And bottom line is that you shouldn't have to mess with different springs. Are you telling me that it is ok to have customers have to switch out springs with elevation changes? Here in Southern California, you can go from surf to high elevation snow in 2 hours. With Synchronic BOV, one spring, self-adjusting, just bolt it on and it works.
lmao moron.. a 12psi spring, if anything with elevation vacuum levels drop therefore you'd go with a lighter spring. Also most of the guys I know dont moutn their bov in that particular location, thats most likely not causing a different surge wise but WTF.
ya ive heard you can adjust them to your liking, in how much you want to be "blown off" or recirculated. i know alot of a4 douchebags that do 75/25 ratio, the WRX's sound so nicer just because its a boxer engine.
i see a lot of excuse responses from people using HKS, or Tial defending your preference blow off valve. why dont you just give the Synchronic its probs and call it a day..you just cant beat the technology behind it...what part of no leaks dont you understand? research before you start dishing hate..
You have a -12 psi spring, not 12psi. that means your engine has to hit -23 in/hg in vacuum, which happens ONLY under heavy load when the throttle closes. The subaru only runs -18 at idle. That is why it surges at low load. You need a -11 spring or a -9 spring if you are in elevation (2000 + feet). Don't worry it wont leak since the boost is pushing it down under load. check out tialsports for the pdf.
Is that intake manifold flipped???
tcoffin014 2 days ago
That GT30R turbo sounds great!
iXetsuei 2 days ago
The guys in this video are idiots tial in general make good shit but most people dont know what they need to make it work in their car. ken and ryan know whats up.
xoxkenji 2 months ago
This video is total BS. Tial bov's DO NOT surge unless you have the WRONG spring installed. People need to understand that in order to choose the right spring, you gotta measure your vacuum at idle accurately. Not just with a gauge, but actual manifold vacuum. Once you know your vacuum go to Tial's spring chart and get the correct spring. Just for the record, most WRXs and or STI's with stock cams are always in the range of the 11PSI spring.
Ken327 3 months ago
Love!!! Ughhhh can't wait to get one!!
TURBO43SUBIE 4 months ago
Get rid of the 12psi spring and put in a 10 or 11psi spring
Boosted3GV6 4 months ago
Comment removed
mbdulka 6 months ago
So is surge good or bad? Its good to my ears, but I hope it's not bad to my car!
mountainboundwbd1 7 months ago
@mountainboundwbd1 the surge happens when it cant handle the pressure... it opens and closes the bov continuously like so for the surge.. sounds cool but its not good...
hijodelpremio 5 months ago
@hijodelpremio No? This is because the BOV is not opening at lower boost pressure. The throttle plate closes, air has no where to go but back to the turbo, the reversing air is bouncing off the blades and can be heard through the intake.
Heedlessone 4 months ago
@hijodelpremio your an idiot
ryan348 4 months ago
@ryan348 im an idiot? then u explain why it does that... why dont u do ur research douche bag...
hijodelpremio 4 months ago
@hijodelpremio surge is the compressor wheel having excess boost pressure being pushed back into it instead of out the blow off valve. That it compressor surge. the blow off valve can be surging... i dont doubt that because thats what it sounds like. But compressor surge and blow off valve flutter are two different things. do your research. TIAL is a top quality blow off valve they also make excellent ext W/G's so do your research.
ryan348 3 months ago
@hijodelpremio get a lighter spring btw
ryan348 3 months ago
Try a 9psi spring ... a 12psi spring is over kill for a 20psi GT30 turbo mate.
mbdulka 8 months ago
5 people were evo owners....
brent127wrxlimtd 9 months ago
Get the proper spring for the vacuum your car runs at idle lol, noobs.
calvinculpalt 10 months ago 3
This has been flagged as spam show
how do you get a turbo spool/whistle to become louder?
JamesE0300 11 months ago
OH MY GOD!! That car is fucking amazing!
caelm596 1 year ago
wow man that sound sick as if only i could get one on my P's
crazylilmonkykid 1 year ago
gay.... heavy spring lulz..
UOYtaLOL 1 year ago
how do you get a turbo spool/whistle to become louder?
eddx56 1 year ago
@eddx56 Turn up the boost and get rid of the stock airbox/exhaust
JaymezSPCM 8 months ago
sick
mikenukeoc1992 1 year ago
Uh.. Folks - this is cut from an advertisement for a Synchronic BOV.. Of course they don't want it sprung correctly - they want you to purchase a Synchronic BOV - Which are terrible.. I ran one for a week - and then literally threw it in the trash.. Opens way WAY WAY too often / waaaayyyy too sensitive..
aidanppp 1 year ago 3
Y is surge bad? I think it sounds better
mauri11 1 year ago
@mauri11 it's bad because air is moving in the opposite direction causing the turbo wheel to spin the other way. decreases turbo life, no bueno.
ISeanzyyyI 1 year ago
Thats what happens when your an idiot and don't put the proper spring in
kaosracing386 1 year ago
Thats what happens when running the wrong spring...... I only have the 10lbs spring in my integra making 700whp.... When hooked into the vacuum sorce you can practically run them without a spring.. Wouldn't recommend it but I did while waiting for the new spring.... My buddy has a turbo xs BOV on his subi (ej25 w/vf39 @330awhp) and we just cut the spring down slightly until the surges stopped..hope this helps..
herbfst 1 year ago
Get your facts straight!!
That is not surge, it is the sound made by reversion of air over the compressor blades. This will not cause damage to any decent quality turbo.
Surge happens during acceleration when the compressor moves out of it effeciency range and is unable to suck in air fast enough (usually due to an inlet restriction or running too much wasgate duty and overspeeding the turbo), causing it to violently vibrate which can cause damage to a turbo.
MY05STiUK 1 year ago
@MY05STiUK I have the same problem that starts maybe 3 weeks ago... the sound if awful and My HKS bov is making almost no sounds.... is there a way to check what's wrong any idea would be much appreciated !!! Thanks !
BluNtHeaD05 1 year ago
@BluNtHeaD05 I would say there is most likely an issue with you bov sticking.
MY05STiUK 1 year ago
@MY05STiUK Hey man can you explain to me what mods are necessary on the turbo or bov to make the same sound like the scooby have? I would apreciate it very much..thnx..
NISSMO400R 1 year ago
@NISSMO400R If you want your car to sound like the one if the clip, either run a bov spring which is stronger than required or remove the bov completely and blank off / plug the bov fitting. If you do it the second way, you'll get the sound almost every time you lift off the throttle, as the pressurised air in the intercooler pipework passes back over the turbine blades.
MY05STiUK 1 year ago
@MY05STiUK By removing the bov and run the engine it won't cause a problem to a stock turbo? or even to the engine? and if i change the bov spring, it must be harder?
NISSMO400R 1 year ago
@NISSMO400R Depends on the turbo ... some OE turbos are up to it others aren't. You will have to do a bit of investigation on the turbo you are running to see how robust it is. Only problem would be if you are running a MAF which might cause overfueling on lift off.
When you close the throttle (i.e. lift off) the turbo is still spinning and pressurising air, but because the throttle is closed, the air has no where to go (if no bov), so passes back across the turbine blades causing the noise.
MY05STiUK 1 year ago
Any time I've had to set up a Tial valve you went by vacuum at idle divided in have to ROUGHLY give you your psi for spring pressure. A 12psi spring would mean he's idling at 24in/hg? I doubt it, with that spring it's going to surge no matter what you do.
slocrx1 2 years ago
i like my hks bov (with purple insert) better.
kelvinshiu 2 years ago
uughhh my favorite sound in the whole world!
TURBO43SUBIE 2 years ago 3
Darkside said it best. This vid is $hit. Sure they aren't bashing anything upfront but trust the fact that they know what they r doing. My boy with the 50mm Tial on his 430whp Scoob has not a freakin issue with surge at any boost level and rpm shift. Get real peeps! Knowledge...
Crossfit559 2 years ago
Knowledge is that more Tial adapters are sold for people to convert over to Synapse than any other BOV. Why would anyone in their right mind replace something that they already spent money on if it wasn't working . . .
synaptic1 2 years ago
mine sounds so much betta and its a forester :) this is shit
7WONDERZZZ 2 years ago
Guys, this is a GT series turbo, it will easily soak up off load compressor surge. Rally cars aren't even allowed to run blow offs, and you don't see those turbo's knackering.
GumGats 2 years ago
probably because the engines and turbos are essentially replaced every few races..
FormageOCAU 2 years ago
@GumGats Rally people don't usually run BOVs, because they don't want throttle lag. They don't care about the turbo's life cycle, because it's a race application. If you want your turbo to last, you have a BOV -- if you want better throttle response, but less life out of your turbo, put in a really heavy spring or close it off (or don't even install one). My friends who do rally have adjustable BOVs (Perrin used to make one, as does APS -- like I have) ... they close them for racing.
mbdulka 8 months ago
so is it bad if the bov makes that sound
foxislaborn 2 years ago
That's not the BOV making that sound. But yes, it's very bad...er, it can lead to very bad things. Basically that sound happens when the pressure in the intake pipes has no where to go (either the BOV isn't opening all the way, or isn't working at all) and is forced to go back in to the turbo. That chatter you hear is the air being 'chopped up' but the spinning compressor blades. It can lead to pre-mature turbo failure.
300Z31 2 years ago
so how can you fix this problem?
BeliZmajcek 2 years ago
Well, there are different ways. The quickest way that I know of is to properly adjust the BOV. Obviously there are different methods for each kind, and I don't know how to do it on the Tial. But I went through this same thing with my SE-R. But you should be able to looses the spring's tension somehow. That way you'll can visually see that if you rev the car and let off, the BOV will open due to the sudden pressure change. Even at idle, you should get a pretty full sound.
300Z31 2 years ago
But other than that, it's all about making sure you know how to adjust it. It's pretty easy to find on google.
There could be other issues (wrong spring, etc etc) but I'd bet that the adjustment is just too tight. I base that simply on the fact that it doesn't sound like it's opening at lower boost levels. This is the same problem I had.
300Z31 2 years ago
thats not bad tial blow-offs are made for that sound Any other blow off would be bad
M0neym1ke210 2 years ago
No. The BOV should never make that sound. In fact, like I said before, it's not even the BOV making that sound at all. And yes, it IS bad. If you think compressor surge is a good thing, you're a moron.
300Z31 2 years ago
nicest turbo sound
greetings from chile
marcelfast1 2 years ago
the spring in the tial bov is not for how much boost you are running. its for how much vac you have. you need to get the correct spring for however much vac you car has and you will be fine. tial is one of if not the best bov on the market.
DonnyAyres 2 years ago
FUCK SNYCHRONIC PUSSE SHIT PRODUCTS
this video is so nub It makes me WANT TO SUE YOU! If I was tial sport you BET YOUR FUCKING ASS I WOULD HAVE SUED YOU A LONG TIME AGO!
xxxxdarksidexxxx 2 years ago
You would sue someone for making a video about compressor surge? You're a fucking idiot. They didn't say anything bad about it...all they did was show the compressor surge problems they were having. Learn to spell, and form a proper sentence before you insult someone.
300Z31 2 years ago
nice fucken sound bro props
krispy338964 2 years ago
how do you do so the intercooler pipes doesnt hits the hood?
chubilei 2 years ago
it surges before 12psi because the 12psi spring keep it until after 12psi obviously..
and btw my rx7 has about 5 times more compressor surge than that.. that really is nothing to worry about
beretta2211 2 years ago
its a nice bov , but it not to loud.
hgallegos915 2 years ago
wats ur set up wat are all ur mods?
eclipsegts03 3 years ago
This comment has received too many negative votes show
Just flag as bullshit.
nibble 3 years ago
ahh thats a 12 pound spring!!! rolling your eyes i call bull SHIT
20PsiNow 3 years ago
sounds like chipmunks are gettin sucked into the engine, lol :D
redlineEJ257 3 years ago
Sux that its bad for the turbo cuz it sounds so cool! lol
eb1zzle 3 years ago
I agree with you !!
bustacap12 2 years ago
Clown your right..I have that blow off valve on my 350z and I got it with the wrong spring and it would flutter that badly...I changed the spring and it fixed the problem.
transam6383 3 years ago
lol, tial dont surged like that when they have the good spring. my friend run a tial on his gt30r RSX and it don't surge so stop to bash tial to sell your your bov.
clown73 3 years ago 12
I turned it off when the white guy said, "is it blowing off?"..."That's the vacuum, its only seeing like 2 or 3 pounds of boost there is no load on it at all"
boost is load idiot
get a stiffer spring and stfu already
tial issues very specific springs for very specific vacuum draw @ idle.
another failed attempt to make tial look bad, when is REALITY its the owner that makes the product look bad. just like guns, its not the guns that kill people....people.
xxxxdarksidexxxx 3 years ago 3
my audi tt does the same flutter its completely harmless idk about yours but mine never fluttered till after i got my cold air set up and when i put my head next to the intake thats where the noise comes from and it sounds exactly like yours
weasel15r 3 years ago
first of all that is just harmless flutter, personally i have ran these on all my vehicles. you said you have a 12 psi spring. got to the tial website and get yourself a lighter spring. another thing, people also get that from using shitty vacum line that collapses in the transistion to vacum.
bobg4486 3 years ago 4
thats funny, i've got one on my SRT and i run less boost then that. and i dont have that noise.
theUNYTEDone 3 years ago
Have you checked your vac line for the BOV? If it's too small; that could cause the turbo-flutter... That's hat happened ith my eclipse.. Just seeing if that is the same prob I had or not. That and the amount of vac your engine produces too is based on your bov spring pre-load
PaulRSTEclipse 3 years ago
WOW!!!Im gonna be real sounds like shit mann!!change ur mod
215465 3 years ago
hey my 02 wrx sounds just like that.... but at 12 pounds on stock factory turbocharger muahahaha
hermetkrab 3 years ago
haha its not surge its just fluttering at the bov compressor surge during boosted not at blow off that completely harmless flutter
wrx4life44 3 years ago
lol this kid is an idiot..boost isnt what makes it surge/flutter..its the vacuum not being strong enough to open up against the spring.
transam6383 3 years ago
why does everytime a bov makes that fluttering sound they think its comp surge. Thats just what the bov sounds like when you only producing a lil amount of pressure. Hint that when you are aroun 10+ it makes the appropriate noise. Comp surge sounds nothing like that....lol
meet07 3 years ago
That sound is the prime definition of compressor surge. It's the BOV piston bouncing against the vacuum pressure (due to an improper preload), forcing a small wave of air back into the cold side of the turbo (one might call it a compressor) each time the piston bounces.
This guy's problem is relatively easy to fix. The spring just needs a bigger preload, which will take some testing and finagling.
RossLH 3 years ago
your wrong dude
the bov is not letting air off at 10 psi or 11 this is called a flutter. now then the bov will release when it reaches bout 20 pound boost.
there are some bov's called a double trupmey bov where at small boost it releases through one side where it sounds like a surge but infact it is the bov, then at more revs when the turbo is used more, it goes out the whole(exit) of the bov through the other side of the bov making a normall bov sound.
ceysuns 3 years ago
To be honest! i think that sounds like shit
My turbosmart plumb back is nice & quiet + legal!
R1Z4T 3 years ago
how come the bov sounds different in 1:08 - 1:15 than at 1:23? is one of them bad?
Ted0407 3 years ago
i know this is kinda off subject but if i were to put an sti turbo in wrx would i have to upgrade internals and get a fmic????
subireza 3 years ago
Beautiful sound. I running the same bov with the GT37R AMS set up. I can't find a bov that I prefer.
CaptainSteve0112 3 years ago
The awesome sound of killing a turbo. =P
awoyoshix 3 years ago
hey guys i need a new blow off valve for my 02 wrx...any sugestions???
ossininglax07 3 years ago
how much bhp??
IdidURmom2 3 years ago
Yeah tubejoe69 is right the syncronic isnt better. Anyways it sounds better when your driving and pulling 20 psi insted of reving it up because you get no psi when reving no load.
koseys1337rex 3 years ago
That sounds terrible
rmnovak86 3 years ago
wow, you really need a synchronized blow off valve for that.. :S, id hate to see the turbo start to get some massive shaft play from that compression surge.., you need a 20lb spring if your wanting 20lbs.., that blow off valves doin nothing for yah :(!
spoolin2hi 3 years ago
you dont know what you're talking about, kid. the wrong spring setup was the cause of it fluttering. the spring used in the bov is not proportional to whatever boost he's running (20 lbs.). his idle vacuum is the determining factor. at first he has a strong spring keeping his bov closed, he should downgrade to a weaker spring to open it easier. synchronic is just doing this to make tial look bad.
tubejoe69 3 years ago
you need a spring based on how much vacuum your engine makes, not boost your running.
research before suggesting solutions
thumpinescort 3 years ago 2
yeah, it's not good...this dude needs to get it tuned
tripz1196 3 years ago
i want to have sex with that turbo....i think the turbo sounds better then the bov...
supermanjs2416 3 years ago 13
haha that cracked me up
=]
RubberDuckieXcore 3 years ago
@supermanjs2416 Your dick would get all sorts of chopped up.
golden290 11 months ago
@supermanjs2416 just wait till it cools down 1st
docjones1979 5 months ago
nice sound man
mehmet190312 3 years ago
best WRX ever, well fkn done
zoidbergmerc 3 years ago
flutterdump
K4MR411 3 years ago
OH WOW!!!!! Maddddd compression surge! When the BOV blows off sounds great. Dude that expensive turbo is getting wasted everytime he steps off the gas muhahah!
lilitalygarbler 4 years ago
God i love the whistling or the spoul up... Subarus are a big "Get off object.''
legacysubaru7 4 years ago
love the sound
ecw7790 4 years ago
What bov is this?
mr34n 4 years ago
and what do uz mean by it surges at 5 ,10 psi but not a 15, 20 does it mean at 5 psi it goes back through the turbo and flutters and once it hits more boost it goes throug the bov. what exactly is the compressor surge please?
ceysuns 4 years ago
you've got it right. Depending on the spring you have in the other BOV, it will not open until you hit the boost pressure for that spring. So with an 11 psi spring you will get surge/flutter with any boost level below 11 psi.
synaptic1 4 years ago
hmm so a surge is exactly like a flutter where you have the pipe on the mouth of the turbo
ceysuns 4 years ago
lol. That is so off of the truth. Get your facts straight. A blow off valve's spring rate is based on the VACUUM your engine makes.
-22 through -23 : 12 PSI spring
-18 through -21 : 11 PSI
-14 through -17 : 9 PSI
-10 through -13 : 7 PSI
Freaking noob.
EyeHeartBoost 4 years ago
^^^bump
djbatman 4 years ago
At least someone isn't retarded. Thank you for your input, kind sir.
dsmpure 3 years ago
can you put this on a s15 and how would you do it please any1?
ceysuns 4 years ago
ive just put a deposit down for a wrx. :)
nigel101 4 years ago 2
I just found out that both usernames here are Synaptic. How funny! Hard to believe that this video isn't rigged or biased now...
x99percent 4 years ago
Might it be surging because the BOV is in the wrong location? According to Garrett, it should at least be placed AFTER the intercooler.
Direct quote from Garrett's site:
"The BOV should be installed between the compressor discharge and the throttle body, preferably downstream of the charge air cooler (if equipped)."
x99percent 4 years ago
it is located right before the throttle body
synaptic1 4 years ago
Ummm... look again. The BOV is located immediately after the compressor, before the FMIC... LONG before the throttle body, which is located right in the middle of the engine bay (blue coupler above alternator).
x99percent 4 years ago
Whoa, you're right. Completely forgot about that. I guess the Synchronic fixes the surge, even in that location.
synaptic1 4 years ago
Regardless, I don't think it's exactly fair to bash a competitor's product, based on an obviously bad install by an independent shop/fabricator/customer. That BOV is simply in the wrong location.
x99percent 4 years ago
It isn't bashing. Tial is a good product. But, this is a fair comparison with both products in the same location. 1 should not be at a greater advantage than the other.
synaptic1 4 years ago
perhaps if you used the correct spring in the tial it would be 'fair' numbnuts
DSMgen1 4 years ago
Listen, until this video came out. There was nothing published about what was the right spring. You have to thank this video for getting them off their tail and updating their info. And BTW, it is the right spring in there. Or maybe people should just buy a product that doesn't require them to change springs whenever they make a mod, change elevation or one that is designed to stay shut at idle instead of being designed to get rid of compressor surge.
synaptic1 4 years ago
Im loosing my mind. I love the Sound a dat compressor surge i kno its bad but it sounds frickin awesome.
tedzone01 4 years ago
Sweet ride!
46DOCTOR46 4 years ago
fluttering noise = bad!
f4zey 4 years ago
no, just means all the air isn't coming out the bov and some is coming back past the turbo and out the pod. there's no evidence to show it wrecks the turbo.
tuf180 4 years ago
Your a fucking idiot. Why do you think theres something called compressor surge. There is this gate, called a throttle body, once that gate closes, and there is still air to be discarded of, like he said, the car hits vacuum quickly, causing the the BOV to shut, because it thinks it time to, WHERE DOES THAT AIR GO? Right back to the compressor, aka turbo.
mytbouf21 4 years ago
Now, the turbo is running 20psi, i would bet half to 2/5 of that comes back to cause compressor surge. THAT WILL RUIN A TURBINE QUICKER THAN EJAC. No one better post about these things unless you have a fucking clue.
mytbouf21 4 years ago
You're an idiot. There's nothing to prove that running no BOV will damage the turbo. In fact, I'd bet not letting the turbo cool down after the end of a thrashing would damage it more then no BOV.
tuf180 4 years ago
I agree. the necessity of having a b.o.v is an urban legend.
Tial b.o.v's are adjustable. any b.o.v will cause surge if it is not setup correctly.
clutsta 4 years ago
Oh my god I am LOL'ing. Thanks for the laugh.
EyeHeartBoost 4 years ago
when you shift, it doesnt sound right.... it's supposed to be a quick air blow out... not a lasting one like yours has...... yours is gurgling
b2brawler 4 years ago
thats just cuz hes not shifting fast.
injendc4 4 years ago
I was having some compressor surge with my Tial as well (Edelbrock PerformerX turbo kit on a Civic), despite using the correct spring. Using a softer spring would reduce the surge, but then the Tial would stay open at idle so this simply wasn't an option. So I replaced it with a Synchronic bov (with filter) which pretty much eliminated the compressor surge.
turbod16y8 4 years ago
Amen, thank you for the testimonial. There is nothing rigged on these vids or any intent to deceive. There are quite a few out there with this same experience.
synaptic1 4 years ago
to tight of a spring.. shoulda went with the 7 psi spring...
zeroxorxdie319 4 years ago
yea man compressor surge is no joke
u could port your compressor housing like on the HKS T04Z turbos ;]
gabe1185 4 years ago
don't do it, the sound you hear is the air hitting the compressor as it goes back. unless you don't mind messing up your turbo's bearing section, put a higher rate spring or adjust tension higher for keeping the bov from opening.
tubejoe69 4 years ago
So how do i get a fluttering noise on any BOV in general? I think it sounds good, but are you saying that it damages your turbo?
DFXFAZ 4 years ago
you should be using an 11lb spring. our cars idle at 20 in/Hg.
tubejoe69 4 years ago
Yeah it's bad news when your BOV makes that fluttering noise.
You Suby boys idle at -11 to -22 vaccum? -25 to -30 here lol. I have no idea if thats good or bad for the motor though. but it's become that low only recently when I put in bigger injectors :\
SpydermanGST 4 years ago
eh yeah spinnin backwards.
shotindahart 4 years ago
yeah, compressor surge = unnecessary loss of compressor turbine speed (resulting in increased lag) and premature wear on your bearings. Loosen up that spring or somthing...
my83merc 4 years ago
gg your car
zoubaru 4 years ago
A healthy motor on any car should be pulling around -18 to -22in. Hg. of vacuum and like I said you decrease vacuum based on atmosphere. Thats why the Tial comes with the 11lb spring from most everywhere and the other springs are usually sold seperately. There are exceptions, but this is usually the case.
DoveofHope 4 years ago
The car was filmed at sea level. And bottom line is that you shouldn't have to mess with different springs. Are you telling me that it is ok to have customers have to switch out springs with elevation changes? Here in Southern California, you can go from surf to high elevation snow in 2 hours. With Synchronic BOV, one spring, self-adjusting, just bolt it on and it works.
synaptic1 4 years ago
lmao moron.. a 12psi spring, if anything with elevation vacuum levels drop therefore you'd go with a lighter spring. Also most of the guys I know dont moutn their bov in that particular location, thats most likely not causing a different surge wise but WTF.
DoveofHope 4 years ago
recirc??
bananabis420 4 years ago
There's a recirc fitting that comes with each Synchronic BOV
InBoostILust 4 years ago
ya ive heard you can adjust them to your liking, in how much you want to be "blown off" or recirculated. i know alot of a4 douchebags that do 75/25 ratio, the WRX's sound so nicer just because its a boxer engine.
bananabis420 4 years ago
if it's surging, and you know about it, then stop driving the damn thing.
ichbingott4510 4 years ago
My friends wrx has a similar setup and his doesnt surge. His BOV is located on the IC pipe and is closer to the throttle body though.
mmeyer1 4 years ago
That poor GT30 is praying to the turbo gods. LOL
anthonyberry4 4 years ago
That chatter sounds awesome, is that a sign of a problem with the setup? I can't quite follow these comments
v11o 4 years ago
The chatter indicates compressor surge. Not a good thing. It is the turbo "chattering" from pressure in the direction opposing rotation.
InBoostILust 4 years ago
Wouldn't you rather have a BOV that you can re-route, will absolutely not leak under boost and you don't have to figure out any springs at all?
synaptic1 4 years ago
obviously using the wrong spring. like stated you pick a spring based on your vacuum pressure at idle!
cammyman1 4 years ago
You dont chose the bov spring by how much boost your running, you chose by how much vaccum you have at idle do some research on tials website.
hksgst 4 years ago
i see a lot of excuse responses from people using HKS, or Tial defending your preference blow off valve. why dont you just give the Synchronic its probs and call it a day..you just cant beat the technology behind it...what part of no leaks dont you understand? research before you start dishing hate..
mzking1980 4 years ago
So, do you have to change springs if your elevation changes?
InBoostILust 4 years ago
You have a -12 psi spring, not 12psi. that means your engine has to hit -23 in/hg in vacuum, which happens ONLY under heavy load when the throttle closes. The subaru only runs -18 at idle. That is why it surges at low load. You need a -11 spring or a -9 spring if you are in elevation (2000 + feet). Don't worry it wont leak since the boost is pushing it down under load. check out tialsports for the pdf.
tradersalt 4 years ago
There is a good.. this man is speakign the truth, vacuum and elevation!!
DoveofHope 4 years ago
subarus run at -22 at idle.
I run the -11 psi spring and I have some slight surge under low load but nothing like this.
higB0x05 4 years ago
Trust me, it is damn good, like 20" good
synaptic1 4 years ago
wrong spring
JAY459834593469 4 years ago
He just used the spring that his dealer's tech support told him to use
synaptic1 4 years ago
Your vacuum source probably isn't the best.
mk3brent 4 years ago
Was this vid about an HKS?
synaptic1 4 years ago
ur bov is a pos lol no offense.. i run a hks on a gt30r with a perrin fmic and i have to surge problems
nkdm6balla09 4 years ago