i used to have those turbos on my old set up, made 300rwkw untill the amfs maxed out
ended up selling them for 700 as a pair so u did alright
from memorty those turbos are rated to 310-320 hp per turbo so u would be able to 350rwkw on them, pretty sure someone made 370rwkw in the 26 dyno results thread...
they are plain bearing and yes they are a bit laggy but they sure as hell are fun to drive with, come on hard which makes them feel fast
a mate of mine just put some -9s on his GTR that makes about the same power as mine use to... personally i found them a bit liniar and boring
wouldnt use them for track where response counts, maybe on the street where the smile counts
-7 and -9 to me = boring, im sure alot of people wont like this reply as everyone seems to be hung up on response
if i had the old set up id have taken ya for a drive but its not to be
if u want the response then get the 9s so u have room for more power if u want it