I run my turbo's at 1 bar anyway so i wouldnt be looking at much of a gain i dont think. The turbo's have been running 1 bar for the last year perfect, no smoke at all.r33 v-spec said:If they are stock BNR34 turbos, then Nismo suggest a max. of 1.15bar. Should see around 400bhp, i guess maybe slightly less or more.
I run mine at 1.05 to be on the safe side