turbo flutter
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Freshman User
Joined: Dec 2002
Posts: 28
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From: Council Bluffs, IA
turbo flutter
I was wondering if anybody knew what to do about the turbo flutter at between 1600-2000 rpm on programmed trucks. Seems like it would have to be detremental to the turbo life. Any response would be appreciated.
Thanks
-Tony
Thanks
-Tony
Freshman User
Joined: Aug 2003
Posts: 25
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turbo flutter
my turbo does the same thing going up a hill at 60 mph in overdrive. My truck is going in tomorrow to have it dyno'ed and to find out how to stop the flutter. Piers diesel makes a compressor wheel that is suppose to stop it. some say it works, some say it doesnt. if all else may have to switch turbos. but I will find out this weekend because I will be talking to a diesel performance mechanic.
Tyler
Tyler
Senior User
Joined: Jan 2003
Posts: 194
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From: East Hampton, NY
turbo flutter
So what exactly is turbo flutter? I recall someone describing it as similar to the noise you hear if you blow into a fan. So, get your face close to a fan (not too close, we don't need a lawsuit) and blow. Hear that? So if its just the noise of air getting chopped up by the compresser wheel, why is it detrimental? Is it bad for the bearings or something? Just curious.
-Shawn
-Shawn
Thread Starter
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Freshman User
Joined: Dec 2002
Posts: 28
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From: Council Bluffs, IA
turbo flutter
Not only does it make the noise, the boost pressure rapidly fluctuates, putting (i suppose) extra stress on the compressor wheel. Changes up and down a few psi rapidly, probably 5-10 times per second. You can watch the boost gauge "twitch".
Tony
Tony
Junior User
Joined: Jul 2003
Posts: 77
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From: Dallas
turbo flutter
Anytime you have flutter, or compressor stall, from what I understand......It is a separation of airflow from the turbine blades....but I am also baseing this on what compressor stall is on a jet engine....I dont think that it is good for the turbo, it just starves the engine of air.
Please dont flame me I am going off of compressor stall on an engine....maybe someone more educated can enlighten me if I am wrong.
Thanks
Mark
Please dont flame me I am going off of compressor stall on an engine....maybe someone more educated can enlighten me if I am wrong.
Thanks
Mark
Junior User
Joined: Jul 2003
Posts: 77
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From: Dallas
turbo flutter
Disregard my last post.....I'm a little slow....must be all that idle in the garage with the doors closed.
Mark
Mark
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turbo flutter
Powerstroke99 7.3/Tyler,
What did you find out from your Diesel performance guy? What were the dyno results?
What did you find out from your Diesel performance guy? What were the dyno results?
Last edited by born.to.ride; Sep 13, 2003 at 05:41 AM.
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Postmaster
Joined: Feb 2002
Posts: 2,773
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From: Bonney Lake, WA
turbo flutter
Turbo stall and turbo flutter are two different things. Turbo flutter is caused by the exhaust going through the blades, creating a fluttering sound. All Powerstrokes do it, but it's much easier to hear on a truck with a modified exhaust, especially one running a straight pipe, since there's nothing to muffle the sound. It's a high frequency sound, so a low restriction muffler won't eliminate it. I've spent a considerable amount of time and money trying to find the right combination of low restriction and flutter removal. What I had to do finally was to find the muffler that best found the balancing point between low restriction, and least flutter.
New User
Joined: Sep 2003
Posts: 17
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turbo flutter
O.K. here's one for you Guys
I just recently replaced my air filter and while I was at it, I removed all the tubes from the box to the turbocharger and the box, itself, clean them inside and out and then replaced everything making sure that all clamps were tight and that the box was sealed. Now I have developed a fluttering noise (coming from the tubo I'm quessing) at 55 MPH that I did not have before changing the filter. Also once it starts at 55, I back off the accelerator and it will stop making the noise. But, after accelerating once again it will flutter this time at a lower speed and will continue unless I stay under 45 MPH. I removed and replaced the air side tubing, this time paying more attention to detail to ensure everything is properly installed and tight. Took it out and again the same thing happens. Note: I did not touch anything on the exhaust side, which would make since for a potential root cause of turbo flutter as compared to the compressor side. So, what is going on here, any ideas?
I just recently replaced my air filter and while I was at it, I removed all the tubes from the box to the turbocharger and the box, itself, clean them inside and out and then replaced everything making sure that all clamps were tight and that the box was sealed. Now I have developed a fluttering noise (coming from the tubo I'm quessing) at 55 MPH that I did not have before changing the filter. Also once it starts at 55, I back off the accelerator and it will stop making the noise. But, after accelerating once again it will flutter this time at a lower speed and will continue unless I stay under 45 MPH. I removed and replaced the air side tubing, this time paying more attention to detail to ensure everything is properly installed and tight. Took it out and again the same thing happens. Note: I did not touch anything on the exhaust side, which would make since for a potential root cause of turbo flutter as compared to the compressor side. So, what is going on here, any ideas?
Elder User
Joined: Aug 2003
Posts: 727
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From: Texas, just south of NY c
turbo flutter
BTR, you replaced your stock , old air filter OR did you install a new , aftermarket airfilter(Tymar?)??? If you improved the air volume thru the engine even though you didn't touch the exhaust, there, should logically be, a somewhat increase in the exhaust volume which would be reflected in the performance of the Exhaust side of the turbine, this then is translated into a 1 to 1 correspondence in the intake side performance turbine i would thiMk.......s.kuteman
New User
Joined: Sep 2003
Posts: 17
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turbo flutter
All I did was remove all pieces up to the tubo inlet, cleaned everthing to ensure no dirt is present, replaced everything and install a new OEM filter. That's it, and I made sure everything is properly sealed and tight.
