New turbo weird noise

[pja0750]

Alright so I put a new turbo(ko4) in the other day and now when I accelerate there is a constant noise whenever I rev past 2k I did I boost leak with a leak detector and found nothing, so I'm not sure if it's the diverter valve or what. If anyone has some advice for me to try cause I dkont really wanna pull the turbo out again to check the wastegate. So any info would be great!!

Thanks Pat

[danphines]

from the massive amount of information povided im gonna have to say that its just the increase turbo spool noise from the ko4.
-do you have tuning for the ko4?
-do you have a boost gauge?
-what does the noise sound like?

[ADNpro]

from the massive amount of information povided im gonna have to say that its just the increase turbo spool noise from the ko4.
-do you have tuning for the ko4?
-do you have a boost gauge?
-what does the noise sound like?

Haha, exactly what I was thinking when I read it. Answer his questions and then hopefully someone can answer your question. Although I'm sure its probably just the turbo spooling haha.

[pja0750]

No I do not have a tune, yes I have a boost gauge, I forgot to mention that it's only putting out 2-3lbs of boost, and it sounds like a constant whistle/vaccum noise threw every gear. It dosent pull hard at all. I diconnected the wastegate accuator and hooked up gauge from there and only got about 5-6lbs, is there a possiblity that it could be the wastegate bypass regulator valve (N75)

I'm just running out of ideas to try so if anyone has heard of this or know any info that would be awesome

Pat

[dirtyb5a4]

get a tune...

[terraflata]

X2. Why would you even run your turbo without a tune? My car used to make noise in every gear also only past 3k. I thought it was normal. never had any problems, but it probably would have run better had I fixed it.

[pja0750]

I don't see why a tune would change the noise I'm getting cause it sounds like there is a leak in the system, and would the stock ecu still give stock boost? I'm getting 2-3lbs when I should be getting 8-9lbs on a stock ecu

[Gaberossi]

def need a tune man

[fbdohc]

If it sounds like a dental tools use in clinic, maybe a blown turbo

[pja0750]

If it sounds like a dental tools use in clinic, maybe a blown turbo

It's brand new!

[somebody5788]

If you didnt prime it its a bad turbo

[bandit]

If you didnt prime it its a bad turbo

no need to prime the turbo. It sees oil within a few seconds after startup

[walky_talky20]

no need to prime the turbo. It sees oil within a few seconds after startup

Tru dat.

OP: have you tried disconnecting the vacuum line between the N75 and wastegate actuator? What boost do you see (at the Manifold) with the line disconnected?

[turbo kraut]

you come on here and ask for help, but when help is offered you argue, like stated before you didn't give alot of info, you need a tune as well

[JK35]

I don't see why a tune would change the noise I'm getting cause it sounds like there is a leak in the system, and would the stock ecu still give stock boost? I'm getting 2-3lbs when I should be getting 8-9lbs on a stock ecu

I can't believe I am about to say this, but then again, I can't believe you just wrote this!

that statement is a solid indication you have no business doing what you're TRYING to do.
there are so many variables you're not even considering, that there's a good chance you're going to damage something before you solve anything.

Without the tuning, you have nothing. you could install the biggest, baddest EVERYTHING -inside out!
and without a means to control and monitor it, much less "tune" it, God only knows what your motor is doing, -literally...

Get a chip, or a piggyback (or a standalone) and either devote some time for learning curve or else hire someone competent to set it up (and to be liable for the success/failure of this endeavor ;) )
GL with it, and if you must drive it, take it really easy until you do get something resolved with your ECU

[njm23]

guys, its a ko4.. This isnt a gt30.. You can run a ko4 just fine on stock tuning.. A LOT of guys have done it over the years,including a good amount of the s4 guys that put in ko4's but no tune or fueling.. The ecu/tune isnt the issue.. well maybe its in limp mode, but the car will run fine with a ko4 on stock stuff for now..

[geeky]

guys, its a ko4.. This isnt a gt30.. You can run a ko4 just fine on stock tuning.. A LOT of guys have done it over the years,including a good amount of the s4 guys that put in ko4's but no tune or fueling.. The ecu/tune isnt the issue.. well maybe its in limp mode, but the car will run fine with a ko4 on stock stuff for now..

+1

The k04 is advertised as an upgrade that does not need any other attachments, BW worked close with Audi in making the K04-015 so that it could be run on a stock tune without major issues. Now that being said, it's always good idea to get a new tune for the vehicle with supporting mods as you run less chance of fu*king something up and you usually gain more power by getting a proper tune.

From the sounds of it, OP have you replaced your DV? If you're running an upgraded turbo on the stock tuning, I have a feeling that you over looked replacing the DV to either a Bosch 710n or any other aftermarket DV. The stock DV that comes in our cars is NOT meant to handle anything past the K03.

[somebody5788]

no need to prime the turbo. It sees oil within a few seconds after startup

Hmm I've seen S4 guys complaining about new turbo's going bad cuz the shop didnt prime them.

[pja0750]

Tru dat.

OP: have you tried disconnecting the vacuum line between the N75 and wastegate actuator? What boost do you see (at the Manifold) with the line disconnected?

i have tried this and got only 5-6lbs of boost

[pja0750]

you come on here and ask for help, but when help is offered you argue, like stated before you didn't give alot of info, you need a tune as well

im not trying to argu i just think that its something besides a tune

[pja0750]

+1

The k04 is advertised as an upgrade that does not need any other attachments, BW worked close with Audi in making the K04-015 so that it could be run on a stock tune without major issues. Now that being said, it's always good idea to get a new tune for the vehicle with supporting mods as you run less chance of fu*king something up and you usually gain more power by getting a proper tune.

From the sounds of it, OP have you replaced your DV? If you're running an upgraded turbo on the stock tuning, I have a feeling that you over looked replacing the DV to either a Bosch 710n or any other aftermarket DV. The stock DV that comes in our cars is NOT meant to handle anything past the K03.

i have not replaced the DV but do u think it could have anything to do with the N75 valve not applying the proper pressure to the wastegate to tell it to open at the right time?

[pja0750]

i appreciate all your guys help, im trying all the options before i have to take it all out again and or buy a tune

[Aragorn]

What a load of BS. Forget the tune, its absolutely nothing to do with it.

If your only getting 7psi with the wastegate line removed, then you have either a MASSIVE boost leak, which would surely be accompanied by a very loud rushing sound, or the turbo is faulty in some way. Without that sense line, your boost should rocket to something silly like 20psi, EVEN ON A STOCK TUNE! then the ECU will catch it and dump you into fuel cut.

Pressure test it up to 15psi and see if it holds, if it does, then your looking at a fault with the turbo itself.

Its not a Chinese copy is it?

[danphines]

from what you are describing i would bet money that your wastegate has come off line so that it wont spool fast at all and wont get very much boost. take off the turbo and look at the wastegate. i bet thats it. happened to me a while back, i had the same symptoms.

[BenjaminR]

This is prime example of why its almost becoming a waste of time coming here for any advise...

So many morons with horribly wrong info that would scream it from the top of a mountain claiming it was etched in stone as a testament of time.

VVVVV This is where my money is VVVVVV

What a load of BS. Forget the tune, its absolutely nothing to do with it.

If your only getting 7psi with the wastegate line removed, then you have either a MASSIVE boost leak, which would surely be accompanied by a very loud rushing sound, or the turbo is faulty in some way. Without that sense line, your boost should rocket to something silly like 20psi, EVEN ON A STOCK TUNE! then the ECU will catch it and dump you into fuel cut.

Pressure test it up to 15psi and see if it holds, if it does, then your looking at a fault with the turbo itself.

Its not a Chinese copy is it?

[pja0750]

What a load of BS. Forget the tune, its absolutely nothing to do with it.

If your only getting 7psi with the wastegate line removed, then you have either a MASSIVE boost leak, which would surely be accompanied by a very loud rushing sound, or the turbo is faulty in some way. Without that sense line, your boost should rocket to something silly like 20psi, EVEN ON A STOCK TUNE! then the ECU will catch it and dump you into fuel cut.

Pressure test it up to 15psi and see if it holds, if it does, then your looking at a fault with the turbo itself.

Its not a Chinese copy is it?

this is what ive been trying to get at thank you!!

No its not a cheap chinese copy its brand new from from RP turbo

So... i should pressure test the wastegate to see if it holds 15psi?