Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

turbo whistle

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  #11  
Old 10-05-2011, 02:52 PM
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I put a straight 5" exhaust on my LB7. Didn't whistle much more than before.

It could be an aftermarket turbo.
 
  #12  
Old 10-06-2011, 10:03 AM
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I was wondering why I could hardly hear my turbo on my 01 duramax, I guess it's pretty normal for a stock rig.

I would wonder if the guy has a different turbo. I have a 93 GMC Typhoon and the stock turbo whines like my wife It's loud inside the car. I've never heard of changing the intake that results in increased turbo whistle...maybe I'll try that too
 
  #13  
Old 10-06-2011, 10:43 AM
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The IHI turbos on the LB7s are QUIET!
 
  #14  
Old 10-06-2011, 02:16 PM
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Yea, the point I neglecte to make is that I've had 3 different turbos for my Typhoon. All 3 have different sounds. GT35R sounds like a wind tunnel with little wistle, 20g stock upgrade has a different sound than the stock. It's all good, love my Duramax

---AutoMerged DoublePost---

Originally Posted by Ozz
Yea, the point I neglecte to make is that I've had 3 different turbos for my Typhoon. All 3 have different sounds. GT35R sounds like a wind tunnel with little wistle, 20g stock upgrade has a different sound than the stock. The wistle on the Duramax could have been either an upgraded intake &/or an upgraded turbo...... Whine or not, It's all good, love my Duramax
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Last edited by Ozz; 10-06-2011 at 02:16 PM. Reason: Automerged Doublepost
  #15  
Old 11-01-2011, 11:26 AM
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intake works the best for the whistle or bigger turbo
 
  #16  
Old 11-01-2011, 08:57 PM
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I have an 02 duramax with just a muffler delete inside the truck the turbo is pretty loud between 6-12 lbs boost
 
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