2003: What makes that whistle? - Ford Powerstroke Diesel Forum
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post #1 of 27 Old 11-04-2010, 02:31 PM Thread Starter
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2003: What makes that whistle?

Love my 2003 6.0L, nothing like the sound of that turbo. But im curious and want to know, what is it exactly about that turbo that creates that easily recognizable sweet sweet whistle? Is it the vanes or number of vanes, is it the turbine/compressor wheel (or the particular number of fins on the wheel) or is it some combination of the two? Also, is that whistle able to be re-created on a different / aftermarket turbo by doing some kind of modification?
Appriciate any insight...thanks!

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post #2 of 27 Old 11-04-2010, 04:16 PM
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not positive but i think that it has something to do with the vanes and/or number of vanes.

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post #3 of 27 Old 11-04-2010, 04:24 PM
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That's right, the number of vanes on the exhaust side makes it whistle more. An 03 turbo has 10, it'll look like this...


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post #4 of 27 Old 11-04-2010, 04:28 PM
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There is also no silencer ring.
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post #5 of 27 Old 11-04-2010, 04:28 PM
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The vanes cutting the air. All turbos make that noise, even from my rice rockets. But the number of vanes (less in the 03) make a difference in the pitch.

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post #6 of 27 Old 11-04-2010, 04:52 PM
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and the pitch is just right
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post #7 of 27 Old 11-04-2010, 07:34 PM
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My neighbors are happy I dont have an 03! My 06 stright pipe can still be heard 3 houses down once high idle hits in the am. lol

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post #8 of 27 Old 11-05-2010, 12:51 AM
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Quote:
Originally Posted by topdwg View Post
That's right, the number of vanes on the exhaust side makes it whistle more. An 03 turbo has 10, it'll look like this...


I believe what you are pointing to is the compressor wheel fins which in the 03 has 10 fins. The vanes are undeneath the unison ring and are shaped like little teardrops. Correct me if I am wrong.

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post #9 of 27 Old 11-05-2010, 05:11 AM
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Quote:
Originally Posted by armyguy209 View Post
I believe what you are pointing to is the compressor wheel fins which in the 03 has 10 fins. The vanes are undeneath the unison ring and are shaped like little teardrops. Correct me if I am wrong.
No, it's the turbine wheel, not the compressor wheel that makes the scream.



My 03 is straight piped and screams. It's probably too loud. I try to keep it quiet when driving by cops.

2003 F-250 King Ranch 4x4 CC 6.0L STOLEN!

IDP SCT with "X-Race" tune
4" Diamond Eye Turboback Exhaust
Zoodad
2.5" Lift
Bushwacker Cutouts
18x10 Gear Alloy Full Throttle w/ 38" Nitto Mud Grapplers
Fab Fours Rear Bumper
Offroad Tech Front Bumper with Hella 500's 150w Bulbs
Smittybilt Xrc10 Winch
Icon Adj. Track Bar
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DiPricol Gauges -Boost, Trans Temp, Coolant Temp
Autometer Overhead Gauge Pod
Coolant Filter
Kinetic Yanker Rope
Pioneer P6000UB
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post #10 of 27 Old 11-05-2010, 05:30 AM
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I have an 04.....pretty sure they have more vanes then the 05-07 trucks...mine sounds like a freaking fighter jet in the mornings at high idle
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