cant see why the seals suffer. backpressure is provided by the exhaust side of the turbo. getting it out faster should always help spool. too big may create a void where gases can cool faster lowering velocity. wrap or a coating helps there.
what's the exhaust pipe size should be for GT2871R??
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I cannot understand how the pressure differential over turbine, be it bigger or smaller, would affect in any turbo seals in any way. I also disagree that larger dp would make egt go down remarkably faster, the gas velocity of course drops in direct proportion of the pipe diameter used.Comment
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OK,Finally I get it done.with customed 3" straight pipe from DP to 2 3" Tips out.the sound is nice.
I'm not the big fan of boommy exhaust.20" length on center and rear mufflers.welding job is AAA+.
ignore my CV boot lol.I replaced it.











one of a few I5 from Asia.Comment
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