When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
any one knowing why i got turbo whistle?
during acceleration during low speed you hear turbo whistle, and if you rev the engine at neutral you can here some whistle fron left side engine. Any ideas how to pressuretest the turbo system?
any one knowing why i got turbo whistle?
during acceleration during low speed you hear turbo whistle, and if you rev the engine at neutral you can here some whistle fron left side engine. Any ideas how to pressuretest the turbo system?
You will hear turbo whistle, it is normal.
But, i m not sure how loud is yours. Or how it sounds.
Does it just happened recently ?
Does the car drives funny ?
To pressure test, you will have to take off the hose from boost control unit. And hook up the hose with vacuum pump tester.
This hose is connected to both of your turbos. Start vacuum test, see if the vacuum pressure drops.
This is the way testing both turbo
You will hear turbo whistle, it is normal.
But, i m not sure how loud is yours. Or how it sounds.
Does it just happened recently ?
Does the car drives funny ?
To pressure test, you will have to take off the hose from boost control unit. And hook up the hose with vacuum pump tester.
This hose is connected to both of your turbos. Start vacuum test, see if the vacuum pressure drops.
This is the way testing both turbo
Or you can do one turbo at a time.
hello! I have changed those hoses allrrady, my car is tuned and it happend recently, my maximum boost is 1.1 bar, before it was 0,9 bars. So i think there must be a boost leak or smoeghing like that. I would like see if theres any boost leaks, both wastegates seems to work fine.
my turbo sound like supercharger at low speed and high gear, but can not hear anything during lower gear and higher rpm
hello! I have changed those hoses allrrady, my car is tuned and it happend recently, my maximum boost is 1.1 bar, before it was 0,9 bars. So i think there must be a boost leak or smoeghing like that. I would like see if theres any boost leaks, both wastegates seems to work fine
If there is Boost Leak, you will feel it right the way. and CEL will lite.
Mine was at 1.3 bar, i have also tried 1.5 bar or more, then Overboost condition CEL will lite.
It had under boost code twice, but it was broken hose causing boost leak.
By the way, different tune will have different whistle timing from turbo. Just so you know.
Last edited by cocobeex; May 20, 2020 at 05:48 PM.
If there is Boost Leak, you will feel it right the way. and CEL will lite.
Mine was at 1.3 bar, i have also tried 1.5 bar or more, then Overboost condition CEL will lite.
It had under boost code twice, but it was broken hose causing boost leak.
By the way, different tune will have different whistle timing from turbo. Just so you know.
i had underboost code a few days ago and it was because of wastegate arm to right turbo had jumped of, that is now fixed. One day later i think this whistle came. Im not sure if it was there before tho i listen to music often. I will film it tomorrow and let you know about the noise.
i also installed fullflow filters and installed silicone hose for air intake instead of the sofe intake pipe which is original.
The turbo sound like swooosh with superchargersound combined.
i had underboost code a few days ago and it was because of wastegate arm to right turbo had jumped of, that is now fixed. One day later i think this whistle came. Im not sure if it was there before tho i listen to music often. I will film it tomorrow and let you know about the noise.
i also installed fullflow filters and installed silicone hose for air intake instead of the sofe intake pipe which is original.
The turbo sound like swooosh with superchargersound combined.
Does it sound like this ?? You can hear turbo whistle in both clips.
thx you for taking time, it sound like that yes, but from the engine area, not from exhaust sound.
I feel your frustration.
My car was PITA to tweak. I had to dig into my engine bay so often to adjust Watergate actuators. Tweaking it.
I swear that was the best lower back exercise...
Yes
that sound is from engine bay.
Not from exhaust.
I was just recoding exhaust sound.
But because I had downpipe and no muffler.
That's why the whistle sound is loud enough you can hear it from anywhere.
I would think your car is fine.
And you don't feel funny when driving.
If you are worried, do pressure test on both turbo with vacuum pump kit. I bet you don't see leak from it.
I did tons of tweaks on turbo
Last edited by cocobeex; May 21, 2020 at 02:42 AM.
Yes
that sound is from engine bay.
Not from exhaust.
I was just recoding exhaust sound.
But because I had downpipe and no muffler.
That's why the whistle sound is loud enough you can hear it from anywhere.
I would think your car is fine.
And you don't feel funny when driving.
If you are worried, do pressure test on both turbo with vacuum pump kit. I bet you don't see leak from it.
okej, soo thats your car? Can you hear the sound inside your car aswell? I got new vakuum hoses to turbo so cant be that, and during coldstart you can hear som howling as well. Im concern because my max boost pressure is about 1.1 bar and the car is tuned.
okej, soo thats your car? Can you hear the sound inside your car aswell? I got new vakuum hoses to turbo so cant be that, and during coldstart you can hear som howling as well. Im concern because my max boost pressure is about 1.1 bar and the car is tuned.
Yes, that's my video from 2015.
I can still hear it inside the car, but not as loud from outside.
During cold start, I don't hear it. It's loud AF.
Then, i can hear it when cold start about to settle down.
My car got turbo upgraded, tuned, downpipe and lots.
m157, m278 can handle up to 1.5 bar.
but stable at 1.3 bar. That's where my car was set to.
Anything above that....god bless
Last edited by cocobeex; May 21, 2020 at 02:52 AM.
Yes, that's my video from 2015.
I can still hear it inside the car, but not as loud from outside.
During cold start, I don't hear it. It's loud AF.
Then, i can hear it when cold start about to settle down.
My car got turbo upgraded, tuned, downpipe and lots.
m157, m278 can handle up to 1.5 bar.
but stable at 1.3 bar. That's where my car was set to.
Anything above that....god bless
okey! I will see if i can make a film clip about the sound. I can not hear any turbo whistle during revs on neutral, just about when pressing the trothle during low speed and high gear.
Yes, that's my video from 2015.
I can still hear it inside the car, but not as loud from outside.
During cold start, I don't hear it. It's loud AF.
Then, i can hear it when cold start about to settle down.
My car got turbo upgraded, tuned, downpipe and lots.
m157, m278 can handle up to 1.5 bar.
but stable at 1.3 bar. That's where my car was set to.
Anything above that....god bless
here is a clip from cold start you can here turbo howling sound
couldnt attach the clip here? Anyone know how to do?
The sound just like you said, sounds like super charger machine sound.
Now, that's weird.
So, this sound happened after tuned ??
I dont know when it happend, because i listen to music, just heard it the other day. The car boost is the same and runs quite good. The sound goes away at higher rpm but sound nothing when reving in neutral.
I dont know when it happend, because i listen to music, just heard it the other day. The car boost is the same and runs quite good. The sound goes away at higher rpm but sound nothing when reving in neutral.
here a picture of log O2 sensor. Bank 1 sensor 1 seems not working well right?
here a picture of log O2 sensor. Bank 1 sensor 1 seems not working well right?
But it shouldn't make that sound.
I am wondering, if that the high pressure fuel pump sound. But it is in front of passenger side.
And if it has issue, CEL will also lite.
But it shouldn't make that sound.
I am wondering, if that the high pressure fuel pump sound. But it is in front of passenger side.
And if it has issue, CEL will also lite.
By the way, who tuned your car ?
a friend of mine tuned the car and had tuned a several cars like mine without issues.
no cel i on, wounder if my catalysator is cloggd or broken that cause this sound or if its a leak between turbopipe and downpipe because i think i hear the whistle sound more under car than from the front? Shuld go to workshop tomorrow and lift the car up.
a friend of mine tuned the car and had tuned a several cars like mine without issues.
no cel i on, wounder if my catalysator is cloggd or broken that cause this sound or if its a leak between turbopipe and downpipe because i think i hear the whistle sound more under car than from the front? Shuld go to workshop tomorrow and lift the car up.
That sound in the clip is very similar to the cartridge/bearing failure in a turbocharger. Sounds like an ambulance sirien at a distance. Glad you got the issue addressed.
I would also like to add that whenever you "free up" airflow on the filter side of a turbo the sounds become more pronounced. You will hear spool up from the engine bay and the "flutter" of charge air stacking as you snap off throttle. Just make sure you are not using wet filters. MAFS hate filter oil.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
