A striaght T3 with a .82 A/R exhaust hosuing is a BAD match...small compressor + big turbine = bad spool and bad top end (depending on boost). Lose / lose...
I'd look for a T3/T4 50-trim, .63 A/R Stage III wheel...compressor A/R is of little consequence here, .50 or .60 will be fine.
Either run a straight T3 with the .63 housing...or look into a T3/T4 50-trim...and don't use the .82 housing with either, unless you're shooting for +400rwhp.
- Brian
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