TwinTurbo.NET: Nissan 300ZX forum - Actually, you would be amazed then. There is actually
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Subject Actually, you would be amazed then. There is actually
     
Posted by Ash's Z on May 04, 2005 at 3:51 PM
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In Reply To Of course, the corrosive exhaust & particulates in the posted by Zirvana on May 04, 2005 at 12:47 PM
     
Message carbon buildup on the blades rather than any sort of erosion. The material used (inconel) for the turbine wheel is highly resistant to corrosion.

What actually causes a turbo to lose its ability to compress the air comes from worn bearings which allow the blades to contact the housings. This wears the edges of the blades, creating larger gaps as well as bending blades and ultimately, breaking them off the wheel. At this point, the turbo has been long since "shot".

As for the compressor wheel, there is a very small amount of erosion that occurs due to fine debris that makes its way through the filter, however, the effect of this in normal cases is significantly smaller than the wear that occurs over the use of the turbo.




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