ok my GTR turbos are Steel wheel 95% sure. and my guage goes just shy of +7.. which im not sure what that is in PSI. my mates GTR is running more PSI and the guage keeps going on R32.
BNR34 turbos are no good even the N1 are not worth the money. ull spend 3-400 at a shop fitting them. do it urself on this long weekend
with GTRs make sure ur oil feed line and oil return line are free of carbon deposits.. (freqeunt changes of oil and filter will work well as well as a good oil)