Added: 4 years ago
From: synaptic1
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  • I have a APS BOV on my '04 STi. The piston was sticking so I rebuilt it myself. After the rebuild.. my turbo started fluttering which meant my BOV was opening too late (spring pressure too high for the amount of psi I'm pushing). I loosened the adjustment nut and flutter issue solved. Any fluttering noise is always a bad idea.. either under accel or decel since flutter is caused by disturbance of air. I'd like my turbos to have smooth airflow under any circumstances.

  • GAY.

    see my STi @ mgate01

  • And I thought they were supposed to sound like the car in the beginning... My 300zx sounds like the car at the end of the video. I kinda like the sound in the beginning though.

  • @z31man it sounds bad ass, yes, but still is bad for your turbo. IDK some people don't run any bov and say it works fine, other parts will fail first. but hey my bearings can be replaced, rather than whole turbo.

  • i had a girl flutter dump me one time, WOWWW

  • People are retarded, that causes housing cavitation. Daddy needs to stop buying cars soon.

  • @LS7BoostedMiata - housing cavitation ? ( im an n/a bloke, sorry lol)

  • Yeah, it spools your turbine backwards, if you get why im saying. It sounds bad ass, but throws the bearings in the turbine

  • idk much about cars so sorry if i sound stupid but how do u make this flutterdump happen deliberatly, and can it cause damage?

  • Is that Miramar Road at the end?

  • "centrifugal" force does not exist

  • @tylerfrost040192

    Centrifugal force: the apparent force that is felt by an object moving in a curved path that acts outwardly away from the center of rotation.

    It does exist...Punk

  • @ucg102

    You must not have made it past high school physics to know that it doesn't exist. And finding a wikipedia definition does not make it true. Please ask someone with a physics background about "centrifugal" force.

  • @ucg102

    "centrifugal force" = absence of "centripetal force"

  • @tylerfrost040192

    The centrifugal force is a useful concept when the most convenient reference frame is one which is moving in a curved path, and therefore experiencing a centripetal acceleration.

  • @tylerfrost040192 must not have made it though high school to learn that it does

  • it sucks that flutterdump sounds so damn cool.

  • i have flutterdump on my eclipse even with the lightest spring that came with it. i guess i need to grind the coils a little thinner now?

  • Man that thing sounds good. Thanks for sharing.

  • sounds awesome

  • It only sounds like this because the Synapse people can't install blow off valves for shit.

  • @RainingSushi Ever think that, stated in the description, they were showing you what surge was and how to rid your system of it? They said get Synapse products, and you can stop this surge.

  • and is that doing damage to the engine? cause i like this "flutterdump" better than normal bov sound

  • Comment removed

  • grr, flutter dumping isnt bad, it actually sounds sexy.

  • Lol I would do that all the time if I had a turbo'd car 00:59-1:04

  • @agcompton i do do that all the time in my 03 wrx wagon lol

  • @agcompton I do :-) haha

  • @synaptic1 then i suppose flutterdump is bad for the engine isnt it?

  • @tognwstokokinomk7 compressor surge or "flutter, flubber," whatever is hard on the turbo, it doesn't not hurt the engine your hearing accelerated air from the turbo bouncing back against a closed or semi closed throttle plate, this surge travels back and the resulting reverse pressure bounces off the turbo blades making them want to spin backwards. This can slow down your turbo between shifts, the closer you can get to a vaccuum between shifts, the higher the turbo rpm when you open the throttle

  • @Hargak

    wow! thnx for the update!

  • @stevenjazrawi another bov maybe? depends on how much boost ur pushing lol

  • wait.. i hear the flutter then the bov comes in after in this vid.. mines the other way around. i hear the bov then flutter afterwards..

  • I like how Jeremy Clarkson put as a Squirrel mincer.

  • Lool @ the end is this miramar road ?!

  • The fluttering is caused by the sudden closing of the throttle, Air is traveling from the throttle butterfly to the turbo back and forth very fast. That is a flutter. A turbo don't cause flutter. Also that fluttering your hearing can cause you turbo to stall, Also putting very strong load on your in turbo bearing causing long term damage. The reason your having flutter is cause your BOV spring is too tight.

  • Needless to say I wasnt able to pass cause it literally just wont go unless u feather the gas peddle.

  • Sounds like there are alot of turbo intelligent peeps in here..... I got a SVO and it hesitates, surges..etc. and pisses me off cause I went to pass a moped the other day and I nearly got whiplash frim it jerking all around. Ive got to get it fix but have no clue wat causes it?

  • I farted and Poo came out

  • ok! flame me next. I have a bus pass. i don't own a car, and i don't know anything at all about turbos!

  • in other words bad for your turbo

  • can flutterdump be caused by installing a recirc'd dv backwards?

  • @Marshmallowrex umm ok? you can stop trying to be a internet tough guy...like seriously, do u just go on random videos and start trash talking? Thats gotta be pathetic life you have.

  • @Marshmallowrex good for me, now fuck off.

  • im about to get a 09 WRX, i hope i can hear the turbo spool like that, that is pure sex.

  • So how did you fix this problem? I have a DSM 2G and it does the same thing...flutters....

  • HKS has never had a problem with that on mine

  • This is a really good video, must be the first video on youtube that is USEFUL.

  • I took a flutter dump in the toilet

  • I had flutter dump after mexican food today

  • The Synchronic line of products are available by registering at SYNAPSEENGINEERING*COM/CART, use referral code YOUTUBE when you register and be eligible for limited edition designs and market pre-releases

  • i love the noise that BOV makes!

  • Why dont they call it serge... as thats what it is

  • @fpvshitsonhsv no its not "serge", nor is it surge, its flutter. if it was surge he wouldn't had done it more than 5 times and he would of separated his turbo shaft...

  • @tibbracing1 Bullshit iv been a mechanic for 11 years and i know surge when i hear it. This is amplified surge noise and and as thats a wrx they come stock with a DV (Dump Valve). DV's are used for the track as it eliminates most compressor surge ,therefore keeping the turbine rpm alot higher on shifts. You may know of it as a silly BOV that makes funny noises. Clearly the DV has been removed for a BOV(Sound) ,i see this done by many young lads. Serious BOV and dose is all for show ,DV is for go

  • @fpvshitsonhsv ok, so your point was??? and this is true compressor surge...or as your dumbass might say: "serge" watch?v=nCj6Spwl1CU

  • @tibbracing1 Fucken listen hear kid you can say what you want but it is clear as day!

  • @fpvshitsonhsv FuckING listen HERE kid, you can say what you want but it is clear as day!*** you should learn how to spell before trying to teach me something you dont know about :)! just my thoughts

  • @tibbracing1 You are a real shithead know it all ay?

  • @fpvshitsonhsv congratulations mr. Serge

  • Comment removed

  • nice video. but is that bad for the turbo?

  • I miss my bug eye. :(

  • @JakeTeamDagNabbit

    Me too. had a 2002 and I loved it. Wish i'd have kept it. The BMW I traded it in on was a piece of shit.

  • @hallis1 My step dad took mine from me. :( I miss how everyone under estimated it. The only thing that didnt look stock on mine was the FMIC i had. But then i'd get on it and their facial expressions changed so fast.

  • I want a subbie now :)

  • Thats the same i have on my nissan 200sx, it flutters a little before the dump opens, most likely because his dump is on the air intake side and not on the turbo side..

    so the preasured air will go back into the system for a sec before it reaches the dump on the other side

    prob been told 100 times before tho :p

  • but but but flutter sound is so orgasm!

  • iv had lots of turbo cars and never herd that sound before ?

  • just sent this to my pal, im tryed of trying to explain to him ha ha. and to whoever who keeps saying this driver shifts to early he/she aint street making they're making a video, can change gear when they want. low and slow baby

  • @TheGears0121 holy shit I hate to be the asshole that goes out of his way to be counterproductive but I gotta tell you I gave you a thumbs down for your grammar. This is the worst thing I have ever read, my eyes are bleeding.

  • why do people talk so much shit cars are cars period shit

    

  • that really sounds bad and you shift way to fast let it spool man

  • wouldnt that put extra strain on the turbo? i mean when the throttle body closes when you get off the throttle and the turbo's spinning (before the BOV opens to relieve pressure) wouldnt it be kinda like breathing out your mouth while holding your hand over it? please clear this up because it sure doesnt sound too efficient

  • THAT SOUND WAS music to my ear

  • And anyonee who thinks the new WRXs are puss, come find my 2010 protuned stage 2 rexiee,, and well see who will be spittin smack talk after the quarter mile,, or a lap @ the track.

  • Everyyonee hating on how slow subies are in this vidd,, HESSS DUMPING BOOSTT bc his bov is opening too early. Obviously the car is not going to perform,, he's prob gettin crazy knock from his afrs being off as well.

  • @Thegadowguitar He clearly explained that his bov is opening too late... I.E. he's sustaining boost for too long... nothing that would lower the performance, all it does is put a load on the seals

  • LOL SLOW ASS RICER COULDN'T EVEN PULL ON THE MINIVAN

  • @MRTWOHUNGLOW lol a ricer? a subaru is not a rice mobile, if you look at honda's those usually end up gettin riced out by fuckin fags like you, keep teh car look stock, slam it a bit, paint job, full exhaust and rim,s you got a sick lookin car no need for none of that gay fuckin bodykit action

  • @toiletmonsta55 See when yall people say that about those cars like there is a difference there is not a difference they all sound gay and look gay NOTHING DIFFERENT. BTW I dont like any of those piles of shit from a honda to a supra none of them impress me.

  • @toiletmonsta55 slam it a bit......those words dont go togeather eather u slam it or u lower it a bit

  • @toiletmonsta55 eat a dick most of you subaru guys are holier than thou faggots.. if hondas are rice then so are subarus.. cuz a wrx is a heavier uglier civic sedan with awd and a turbo and you get a bodykit from the factory. fuckin wide fenders and ugly ass wings for nothing... my 2500 civic ate a stock 9k wrx so stop talkin shit about something you know nothing about and find something else to hate on because a REAL civic will eat you at 30 miles to the gallon fuckin fanboy

  • @hcnr32 and my truck and my cobalt beat civic's all day at the track, whats your point. No one races/mods cars gives 2 shits about fuel economy. If you care about fuel economy, go buy a smartcar.

  • @Snakes709 wow you missed the whole point of everything i said.. but its ok because your a typical chevy retard from bumblefuck... any car can be made fast was the point i was trying to make its just an added bonus that i can save money i dont spend on gas for bills that i actually have to pay unlike you where mommy and daddy probably paid for everything for you... so take your head outta your own ass and buy a real car instead of some piece of shit cobalt with a bullshi and a Super Soaker badge

  • @hcnr32 i dont even own a cobalt anymore, sold that 2 years ago to get my 370z and now i got my SRT-10. And no, mommy and daddy never bought me anything. Buy a real car? like your 4 banger civic? Come talk to me when you have a V10.

  • @Snakes709 yeah and ill bring out my spaceship and turn the flux capicator to full gaflibbigity and run a negative 3 quater mile... get the fuck out of here

  • @hcnr32 tipical, just another youtube troll, do you even have a car? or do you just have a bus pass? When you go and get a real car, then you can talk, until then, shush kid.

  • @toiletmonsta55 Rice burner is a pejorative describing Japanese-made—or by extension, Asian-made—motorcycles and automobiles. Stupid kids its a rice burner 100%

  • @turbosrt03 says the kid with boosted neon

  • @toiletmonsta55 couldn't have said it any better was gonna reply to him too lol

  • @toiletmonsta55 AGREED

  • @toiletmonsta55 fuckin righttt

  • @toiletmonsta55 It is a ricer

  • @toiletmonsta55 Slam it a bit? thats where you went wrong brother. No subaru should be slammed. They were made AWD for a reason.

  • @toiletmonsta55 that is ricing. do any of those things help the car go fast? no? then it is RICE

  • @chipleader14 slamming it will give it better downforce and lower center of gravity, a full exhaust will add more power, lighter rims means lighter car and a new paint job will get the bitches fast. damn.

  • @ArmyGF147

    An exhaust will barely add more power, and it will only add more power with an entire new air system. Intakes and exhausts should not be your main concern, that is what ricers concern themselves with because it makes the car loud. Rims don't make all that much difference in weight, maybe you should lose a few pounds and take the speakers out of your car? And worrying about getting bitches is also something a ricer concerns himself with

  • @chipleader14 you fucking moron. Light weight rims make a huge difference in weight because you are reducing rotational mass. Thanks. Also an exhaust can make quite a difference in power on a turbo charged motor. It's not "just to make it loud" lol. You sound like a doucher who needs more research.

  • @keyrabuns69 People just don't understand rotational mass, it's pointless to try to explain it to them. They only get it when you smoke them on ultraleggeras against their 22" chrome american racing wheels haha

  • @chipleader14 you're kind of stupid. obviously lightweight rims make a VERY big difference. imagine your car as a weightlifter. due to centrifugal force, and rotational mass, it can really shed off the amount of work the motor has to do. also, turbochargers are all about airflow. do you honestly think a car with a 2" exhaust pipe would breathe well, and allow more air to circulate? its the fundamental concept of an internal combustion engine... combustion meaning fire. which is fueled by air.

  • where is this video taken? the first area looks really familiar.columbia maryland??

  • no idea wanker!!

  • flutter dump hahahahahaha what a cock, 

  • @Scream0kid4life, you may have a super fast honda that can beat a STI, but at the end of the day, you still have a Honda. Oh, and can your Honda slide through tight dirt turns, go 90+ mph on a rally course, hit a jump, or even drive in the snow like a subie can? Didnt think so faggot.

  • @LUMBERZ4CK But then again wouldnt you be a faggot for getting beat by a ricer honda? Just saying. I dont like them but, a car is a car. Ill drive it like no other.

  • @LUMBERZ4CK well.......fucking.....put

  • B E A UUU tiful

  • Some try to run too strong a spring in the setup. And they never figure this out until the shaft goes in two directions SNAP. Large spool turbines can handle this but the smaller ones suffer immensely. OH and by the way don't do this again even for a how to. This can sometimes crush the veins in the inter-cooler, if it has the cross pass veins like mine. Even a inlet line blow off can crush em. Inlet to inter-cooler under boost, usually at high end.

  • ppl tht disliked probably couldnt afford an sti, got smoked by one, or can drive manual transmission for shit.

  • @Orange19218 in norway automatic gear is for 1, women 2, retarded people and finally 3,handicapped people

  • @Orange19218

    Or they just aren't a fan of sucking cock?

  • @rashtte ....

  • would u like to run my tampon it is pussy blood red and smells alil funny but 100 bucks say ur sti or wrx or what ever it is u drive is stock or dam near stock and u think cuz it gos rooooooom pshhh that must mean its fast and a 1000 bucks say id beet u if i was in a geo cuz u cant drive to save ur life

  • @scream0kid4life nigga stop hating he was clearly explaining wtf a flutterdump is

  • isnt it the pressure pack aerosol can before opening the bov?

  • If only there was a dumpvavle that could imitate this exact sound

  • @shamil808 greddy type rs......

  • sins i fully bilt a singel cam civic that made 410 whp and 388 btrq that smashes scoobis all day i will give it to u they can be fast if bilt right and the bugeyes are vary sexy cars but i just hate the dumb assholes who think just cuz they have a turbo that makes them fast

  • @scream0kid4life hondas are like tampons, every pussy has one!

  • @Armixs what about the ones that wear pads instead? lmao

  • wow ur all dumb thats called a shit hole waste gate and compressor surge cuz the bov and gate springs are to tight silly subi drivers need to lern b4 they talk . bilt not bout all day bild ur slow scoobi ur self then talk shit

  • @scream0kid4life Since when are scoobi's slow? You also have a terrible taste in music....

    It also makes you look way more credible if you try to use even slightly correct grammer.

  • @scream0kid4life Funny to see these know it all clowns thinking compressor serge is a good sound. It just makes me laugh when they do it at your window. Like its a sign of HP when really it shows they dont have it till the turbine spools up again. ;)

  • it can vary why it does that, My car has done that because if a vacuum leak

  • @optymusprimelol tell me about it LMAO

  • it sounds sweet but it sucks ass LOL

  • sure thats a dump valve making the noise

  • Is this a 20G turbo?

  • Like This JDM Page on Facebook Search: JDM-Drift-Race

  • Was that another WRX right in front of you? lol

  • throttle butter fly closes in fact wich blocks the boost, and the flutter is nuthing more than the piston in the BOV opening and closing real quik as the air is regulating out.

  • @sidewaysammy89 no the flutter is what comes back out the turbo...

  • @Tj1056 lol no it doesnt

  • @sidewaysammy89 ....

  • omg wen the engine revs up and spins the turbo its creating boost goin thru the valves but when u decelerate, the engine speed drops (valve opening speed) and the turbo "still spinning" builds to much presure in the intake and needs to be released via the blow of valve (valve pressure relese)

  • @LBZMax you have entirely no grasp of turbo setups what so ever. dont run your mouth about things that you dont understand, it misleads people who dont know and makes you look like a douche nozzle. i really like the fact that you got all superior sounding your capital letters and the things you said couldnt have been more incorrect.

  • flutterdump is a butterfly shit

  • If a viewer could figure out what flutter dump might mean, then maybe you shouldn't abreviate "BOV"

  • thas all ur turbo pressure relasing back into ur turbo thus causing it to spin the oppisite direction and "flutter" while the forward pressure is trying to do its job basicly if u keep doing this ull need a new turbo soon

  • @95egkp stfu the blades do not spin backwards

  • @JordanN5253 Actually they can reverse... maybe now a days they have mechanisms that keep them from reversing but i know they can spin backwards

  • @xXxWildxChildxXx no they can't, stop being wrong.

  • @95egkp yep ur right

  • thas all ur turbo pressure relasing back into ur turbo thus causing it to spin the oppisite direction with the forward pressure basicly if u keep doing this ull need a new turbo soon

  • Just saying, might be terrible for your turbo, but it sounds sexy as hell.

  • Couldn't help but notice the mustang at 0:38

  • pottentially could destroy your turbo, but god damn if it doesn't sound sexy

  • @MEAKapc Heard that!

  • is it called flatterdump or turbo spool? i'm confused.

  • @noobskater15 Turbo spool is the high pitch whistle before the BOV piston opens or the turbo flutters, Basically the turbo spinning up to create boost.

  • sounds nice, what turbo?

  • that sounds meet thou

  • This can happen if you have an adjustable BOV and it is set too "Hard"

  • would two wastegates fix that ? or just a bigger one? is it just not venting quick enough?

  • @fifteenYear Wastegates dump exhaust which in turn reduces boost. In this case the turbo has already spooled and has positive pressure on the intake manifold so when the throttle snaps shut the pressure is escaping backwards past the compressor and back into the air box/filter rather than escaping from the BOV like it should.

  • @s04r3r ur a fuckin retard dont post on wat u dont know...wastegates dont dump exhaust (thats why the fuckin TURBO is hooked up to the exhaust) its a spring/diaphragm that dumps the excessive BOOST thats HIGHER then wat its set at. Secondly the boost between the closed throttle plate/plates get let off by the WASTEGATE cause you have no air flow into the engine so now your pressure is higher then the spring rating in the wastegate housing which forces the diaphram open till the excess dumps off

  • @LBZMax

    Youve got it all wrong. Wastegate and blow off valve are different things.

    Waste gate is between exhaust piping and turbine, blowoff valve is between compressor and intake piping.

    Throttle opens and the intake manifold pressure drops so the wastegate directs more exhaust flow through the turbine to raise the manifold pressure.

    All the blowoff valve does is get rid of of excess pressure in the inlet manifold before the wastegate reopens when you take your foot off the throttle.

  • @LBZMax ?? Wow, you really are an aggressive chap...and a really dumb one at that. Exhaust gas is exactly what a waste-gate dumps, and No it does not do the same job as a BOV. Get your facts straight before getting abusive and making yourself look even more retarded...if that's at all possible.

  • @LBZMax  wastegates do dump exhaust gas.

  • @s04r3r THEN HOW the FUCK do you figure it can escape out the intake as fresh air in pourin in? WTF THEN u talk about a BOV which is in a whole different fuckin spot. Sure the BOV and wastegate do the SAME thing but their fuckin different from each other....Ur highschool mechanics class aint workin for ya chief....

  • @LBZMax  I think this comment suites you best " ur a fucking retard dont post on wat u dont know" hahahaha dumb xD

  • CORRECT GOOD VID

  • so is it better for my car to have it adjusted?

  • what bov is that? 

  • Comment removed

  • I have a turbocharged car running 6-9psi with an appexi bov and i once replicated this sound by messing with the screw on top of the bov. By tightening the screw, it got to a point where the valve was barely opening and causing this sound. Once i backed it off, the valve went back to normal. Just some food for thought!

  • @RigsPGT thats what the screw is for...... adjusting the valve. 

  • @bluemk3supra

    yeap, its good to have it that way tho, you go up with boost, tighten the screw a bit :)

  • Thanks man