im also keen to find out this info, my 32 has forged engine set up, big porting and cams, its making 280rwkw (limited by stock afm's) but should make 300rwkw with z32's and bigger fuel set up (running r34 gtr turbos), so upgraded turbos just for a extra 30kw at there limit wouldnt be worth it, i want around 350-360rwkw