CR170 is very good - like stock, but ++ when tuned up (Stage 2, or Stage 3)
@lemoncurd is the ultimate turbo hype-man; hopefully he responds here
i have been summoned
i feel like my position on turbo's is pretty well known at this point, i dont like the thought of upgrading to a cr170. i'd rather fork up the extra dough and slap in a GTB(D or E)2XXX turbo
even a GTD17XX turbo would be a better choice than the CR170.
i have a couple reasons for this logic. CR170 while a great option, ends up putting you in a weird position where you can have a TON of DMF chatter, then still choke out up high. plus wicked high EGT when tuned for more power than the stock rating in EU market
meanwhile, a GTD17XX will do the same DMF chatter, but not choke out so much.
but then, enter the GTD2XXX line. more downlow torque than stock, and tons of highend compared to stock / cr170
GTD2060VZ is kinda my goto recommended turbo these days. if youve got the dough, GTE2260 would be awesome. those are the latest gen VNT tech ones. factory antisurge housing!
but OP, given the odd state of the car (you bought it without a turbo), i personally wouldnt fault you for putting a cr170 or even uprated cr140 into it. a functional car is better than no car!
my chatting about for turbo's is largely for folks who have a functional car right now, and are looking to upgrade down the line. then i say, why not budget for a month or 2 extra and get yourself a really nice turbo that will not make you upset down the line should you upgrade injectors or other parts of the engine for more power