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Variable Area Turbine Nozzle

I think the main reason that they are more common on diesels and not gas cars is that diesels have lower EGTs and the mechanism is not as robust as

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Old 09-19-2011, 02:16 PM   #5 (permalink)
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I think the main reason that they are more common on diesels and not gas cars is that diesels have lower EGTs and the mechanism is not as robust as a normal fixed geometry turbo. Basically it's a reliability concern, it may wear quickly under high temps. Maybe they have improved in recent years though with better materials or something. I have heard of a few turbo miatas using Garrett VNT turbos.
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