You guys are really talented. Very impressed with this concert effort.
Another 2 cents? Any mod in the airstream coaxially (off the wall) is going to be hydraulicly restrictive, defeating the improvements sought. Especially anything that reduces the apparent inlet diameter at the turbo inlet mouth (such as an ID sleeve), as this part of the housing is probably finely engineered to work correctly by an aero engineer.. IOW, I believe you may very much disrupt the intended airflow characteristic, angle of incidence, to the blades. These are just my educated guesses. I never designed turbos, so a better opinion is needed. But I do understand aero and hydraulic engineering concepts.
I can't see the benefit of this sleeve, then perhaps I'm not understanding. If the purpose of it, is to form a step that diverts pooled water toward the center of the blade, how can that be done without severely pinching off air flow/reducing inlet ID?
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Michael Patton (aka Killerbee)
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