whinning before boost

[espo4442]

Hey guys I've had this issue since I bought the car. My car will make a whining noise before I go into boost but then stop and make no noise whatsoever while I’m boosting. Does this sound like a massive boost leak? I was wondering if anyone else ever encountered this. Thanks

[espo4442]

bump

[SilverSurferS4]

Your hearing the turbos spool up, its perfectly normal...
My car does this all the time.. more noticable with downpipes and colder weather..

[espo4442]

hah no i know what the turbo whistle is i mean that It's real audible it sounds like a supercharger whine, but not like a blown turbo whine.

[galvan11]

I too have that sound,more like a whistle noise. I was told it is the turbos spooling, so I wouldn't worry about it.

[Mattgfx]

yeah , if your turbos are going with a whinning noise you would know.. it would be a very loud whinning when under full boost

[Rajan147]

http://youtube.com/watch?v=XSEFUIcgOy0&feature=related

[Vuel Egham]

Holy cow, mine sound like a banshee at full boost, but they don't look, sound or blow smoke like any of those cars!

[dennisS4]

wow not looking forward to this happening

[espo4442]

No guys honestly it's not the turbo's spooling I know what that sounds like it's more audible with the windows up. its sounds just like a supercharger whine it doesn't change pitch like the sound of my turbo's spooling .

[AudiSportB5S4]

have you pressure tested. When messing around with my FMIC a few times, if a clamp is slightly not ON all the way it will make that sound for sure. You will sound like an STI or EVO. haha. try to get a pressure test done or if you have a vid camera post a clip of the sound, that will be easier

[espo4442]

have you pressure tested. When messing around with my FMIC a few times, if a clamp is slightly not ON all the way it will make that sound for sure. You will sound like an STI or EVO. haha. try to get a pressure test done or if you have a vid camera post a clip of the sound, that will be easier

Yeah thats what I figured I just havent had time to test it I'll def be sure to do that and report back thanks

[code7rpd]

I get the same whining noise but only at about 2500-3000 rpm. I thought it was my turbo's going out.

[JDM EJ1 95]

mine was doing the same thing as described.. minor whine under part throttle no boost situations.(barely audible) only with the windows up and no music or anything on. then it started to do it very subtle under boost

i took my drivers turbo off and found about 2 tablespoons of oil in the charge piping and the turbo had minor shaft play.

needless to say my motor is still out awaiting replacement k04s.

[Audi S4 Turbo]

When I over boosted it whined but now that I have a boost controller it wont spin that high.

[espo4442]

again the car is not boosting whatsoever when it makes the whine. my vac is around like 5-10 when it happens

[JDM EJ1 95]

read my post dude ^ i know the noise your talking about

[Audi S4 Turbo]

read my post dude ^ i know the noise your talking about

Have a caused any premature wear on the turbos by spiking really high? I installed a boost controller to make sure it does not happen again.

I'm pretty sure it is fine, but the turbos made a weird siren noise when I spiked real high. BTW they are k04s.

[espo4442]

read my post dude ^ i know the noise your talking about

I did read your post, I was responding to the one after yours

[obviouspro]

My car does the same thing and has for a while. I was worried at first but my car still pulls strong.

[JDM EJ1 95]

Mine pulled hard and had no issues whatosever.. but like i said my drivers side was blowing some oil by. take off your charge piping before your ICs just to make sure.

[GramCracker]

I too have that sound,more like a whistle noise. I was told it is the turbos spooling, so I wouldn't worry about it.

I LOVE that sound. Its awesome. I can't wait for my dp's to make it even louder!

[Sherif]

My car started to do this kind of sound after instaling APR R1 DVs... but it does it between 0-5 psi of boost
exact same sound as in the video... but would I build 25-26 psi with a blown turbo?? (GT25)

[silky]

http://youtube.com/watch?v=XSEFUIcgOy0&feature=related

FK! dont like that sound. getting sick hearing it...
thats just way to loud.

sound im used to hearing seems to be pretty common. more common if you dont have a heavy foot and driving around barely boosting....especially if the oil isnt warm too.

[Rajan147]

whistle tips go whooo hoooo!!!

yeah, i hear the spool and anxiously wait for the turbo fairy

[AudiSportB5S4]

My car started to do this kind of sound after instaling APR R1 DVs... but it does it between 0-5 psi of boost
exact same sound as in the video... but would I build 25-26 psi with a blown turbo?? (GT25)

THAT noise is normal for those DV's. I have hyperboost and its 100% normal. All it is, is you are opening and closing the piston in the DV. I was on the phone with Stratmosphere the guy said you can play with it and get it to just keep making the noise with throttle blips. Its just the DV doing its thing. It IS much more noticeable over stock DV's since those have rubber crappy internals

OP, is THAT the noise youre talking about ?? if so, its your DV's. LOL. I mean, if you can hear it slightly in the car thats the sound, if someone outside the car driving by can hear it, then i would say boost leak or turbo issue. if someone cant hear it outside its just the DV. Which are you running?

[BB2001S4:Tim]

Hey guys I've had this issue since I bought the car. My car will make a whining noise before I go into boost but then stop and make no noise whatsoever while I’m boosting. Does this sound like a massive boost leak? I was wondering if anyone else ever encountered this. Thanks

I have the same problem with my snails...

Its in 3rd gear, passanger side turbo, you hear it distinctly inside the cabin, it happens at just about when you get into boost and I still make full boost...listen:

http://youtube.com/watch?v=XFuxPvHcxzw

Still not sure what it is

[galvan11]

Tim, thanks for posting up that video because that is exactly the noise inside the cabin I hear. I seriously doubt its the turbos going since I just had both of mine replaced. Just spool up I guess. Ironic thing is that I don't remember that sound when first buying the car

[BB2001S4:Tim]

Tim, thanks for posting up that video because that is exactly the noise inside the cabin I hear. I seriously doubt its the turbos going since I just had both of mine replaced. Just spool up I guess. Ironic thing is that I don't remember that sound when first buying the car

Those are new KO4s in there :( I replaced them back in dec. and its been making that noise since. They have about 700 miles on them.

Hows everything with you?

[VinNyS4]

my car does the samething but I still have my k03's. I was worried about the the noise to the first time it happened but I realized that its most noticable on the freeway when crusin at around 50-65. It also only happens in vaccuum when the turbos spools it goes away and they boost properly. I guess its just normal like someone else said it may just be the diverter valves working.

[JDM EJ1 95]

I have the same problem with my snails...

Its in 3rd gear, passanger side turbo, you hear it distinctly inside the cabin, it happens at just about when you get into boost and I still make full boost...listen:

http://youtube.com/watch?v=XFuxPvHcxzw

Still not sure what it is

thats the same exact noise i was hearing and like i said... pulled off the charge piping and found oil on the drivers side.

IT SOUNDED like the pass side but after further investigation

shaft play and oil blowby on my drivers side K04

for anyone that is hearing a similar noise

take off one of the couplers on the lowest part of the charge piping before your intercoolers.. it doesnt take long at all and it will give you an idea on the condition of the turbo.

[alias747]

Dang it you guys are making me really nervous... My car makes a high pitched whine when I am still in vac and making boost, like around -10 to -5. But mine doesn't sound anything like what was in Tim's video. Mine is really high pitched, like like a really high pitched dentist drill. It's really faint and goes away once I get into boost.

Hey JDM, I am going to be replacing all the t-bolts on my FMIC and painting the piping soon and I am going to be taking the piping off. Is it easy to get to that part of the turbo's from the bottom of the car? I haven't really got a chance to explore under my car much. Thanks!

[VinNyS4]

thats the same exact noise i was hearing and like i said... pulled off the charge piping and found oil on the drivers side.

IT SOUNDED like the pass side but after further investigation

shaft play and oil blowby on my drivers side K04

for anyone that is hearing a similar noise

take off one of the couplers on the lowest part of the charge piping before your intercoolers.. it doesnt take long at all and it will give you an idea on the condition of the turbo.

I took my lower intercooler piping on my drivers side and pass. side. I only get the noise some times and its only on the freeway and 3rd gear, and the radio has to be off with the windows up. When I took the piping off I found the drivers side to be lubed with oil not enough to pour/drip out but the inside was covered with a thin layer of oil. In my pass. side I had barely any if any oil. Also when I replaced my DV's the drivers side DV was also a little lubed with oil. I though a little oil blowby was normal on a turbo car?

[VinNyS4]

thats the same exact noise i was hearing and like i said... pulled off the charge piping and found oil on the drivers side.

IT SOUNDED like the pass side but after further investigation

shaft play and oil blowby on my drivers side K04

for anyone that is hearing a similar noise

take off one of the couplers on the lowest part of the charge piping before your intercoolers.. it doesnt take long at all and it will give you an idea on the condition of the turbo.

I took my lower intercooler piping on my drivers side and pass. side. I only get the noise some times and its only on the freeway and 3rd gear, and the radio has to be off with the windows up. When I took the piping off I found the drivers side to be lubed with oil not enough to pour/drip out but the inside was covered with a thin layer of oil. In my pass. side I had barely any if any oil. Also when I replaced my DV's the drivers side DV was also a little lubed with oil. I though a little oil blowby was normal on a turbo car?

BTW my turbos dont whine at all when the car goes into I only hear it in vaccuum.

[BB2001S4:Tim]

Here is a short clip of what my KO3s sounded like. It turned out to be that the fins on the passangers side were clipped or slightly damaged(sorry no pic). The whinning was a little higher pitched and you can really hear it with the windows down and the radio on even if you were outside. It still boosted fine too.

Inside car with the windows down:
http://youtube.com/watch?v=6_M9zQ5f790
http://youtube.com/watch?v=yOZ5r3EIAhg

Outside:
http://youtube.com/watch?v=a1Si4W0hHs4

[JDM EJ1 95]

if its just coated.. your alright..


mine like i said. poured a good 2 tablespoons out of the drivers pipe..


and for alias..

its pretty easy to get to the charge piping like i said.. but i doubt youll be able to chekc for shaft play or anything like that too easily.. thats a little more involved getting to the compressor housing.

[galvan11]

wow the s4 turbo lady paranoia to the max in this thread!

Well i just had my turbos replaced bout 2k miles ago and ever since I got them I had that whistle noise on a light throttle.The noise is in every gear in vacuum. Shaft play on these new turbos? wow. I certainly hope thats not the case.

[espo4442]

wow the s4 turbo lady paranoia to the max in this thread!

Well i just had my turbos replaced bout 2k miles ago and ever since I got them I had that whistle noise on a light throttle.The noise is in every gear in vacuum. Shaft play on these new turbos? wow. I certainly hope thats not the case.

you prob just talking about turbo spool its normal what I'm talking about is a different sound.

[VinNyS4]

yeh its not the normal turbo spool its more of a whine sound or a light sound of the dentist drill

[BlkdoutS4]

once you get the slight whine of the dentist drill, how long can you expect your turbos to last? I imagine it all depends on how you drive but any approximation?