I would like to know where the ceiling of the stock turbo is. At a certain point, it's out of it's efficiency range and it's working too hard.

I am thinking 300whp will be no problem with supporting mods(downpipe, intercooler, exhaust, stage 2 tune). But will the stock turbo support 320whp, 340whp?

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'98 M Roadster and '13 M-Sport 328i 6mt


E36/7: Dinan/RMS stage 2+ blower@13lbs of BOOST! 18" BBS LM's, too much more to list
F30: ForgeStar F14 19's summer-OZ Superleggera 17's winter/Rogue Catback/Integral Audio/AFE intake scoop/BMS stage 1