Stock Compressor Wheel
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Senior User
Joined: Mar 2006
Posts: 204
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From: Michigan
Stock Compressor Wheel
I noticed when I bought my truck the compressor whell had some nicks on the blades and were a little worn. I bought the truck in AZ and noticed the factory air box cover was broken so replaced with a 6637 upgrade. I have been driving it this way at it runs fine and has power but would like to put a stock wheel back on. Where can i get one that won't break the bank or should I replace the whole turbo? 110K on the clock
Post Fiend
Joined: Jun 2006
Posts: 9,714
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From: White Mnt's,New Hampshire
the WW is a stock wheel for the early 99..it is used for the 99.5-03 truck to get rid of surge...you will loose very little power on top.. but you will loose or slow surge that you can get with a chip or when pulling loads..surge will kill your turbo..with the WW ..what you get is.. a faster spool up.and with the 6637..you will get a very nice turbo whistle...and i can still hit 27 lb of boost with the WW and red line hooked in my truck..
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
What Ron said... One thing I noticed is that I see a couple extra lbs of boost now that it's gotten colder. When it was 95 degrees out, I could just see 25 psi, but now I've hit 27ish again. I was getting 28+ with the stock wheel, but the surge was terrible. Now I don't hear any at those levels. This is all with the wastegate disconnected. I liked the extra kick in the pants I felt without it, so I leave mine disconnected.
Post Fiend
Joined: Nov 2007
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From: Payson, AZ
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Elder User
Joined: Feb 2007
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Hey 62trvler I just installed a wicked wheel on mine. My stock wheel looks really good. I'll ship it to ya for free if ya want it let me know.
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Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
Originally Posted by PaysonPSD
Would one of you gentleman explain turbo surge for me?
Thanks
Thanks
The surge region, located on the left-hand side of the compressor map (known as the surge line), is an area of flow instability typically caused by compressor inducer stall. The turbo should be sized so that the engine does not operate in the surge range. When turbochargers operate in surge for long periods of time, bearing failures may occur. When referencing a compressor map, the surge line is the line bordering the islands on their far left side.
Compressor surge is when the air pressure after the compressor is actually higher than what the compressor itself can physically maintain. This condition causes the airflow in the compressor wheel to back up, build pressure, and sometimes stall. In cases of extreme surge, the thrust bearings of the turbo can be destroyed, and will sometimes even lead to mechanical failure of the compressor wheel itself.
Common conditions that result in compressor surge on turbocharger gasoline engines are:
- A compressor bypass valve is not integrated into the intake plumbing between the compressor outlet and throttle body
- The outlet plumbing for the bypass valve is too small or restrictive
- The turbo is too big for the application
Last edited by ron's power stoke; Dec 28, 2007 at 03:56 PM.
Posting Guru
Joined: Nov 2006
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From: house springs,mo
Originally Posted by 62trvler
Isn't the Wicked Wheel what came stock on the 99 trucks? Mine is a 2001and I thought that you loose low end with that wheel.
