ok, engine is rb25, standard except turbo back exhaust n fmic.
now engine has no top end power, made 111kw which is pathetic...
seems to pull alright until about 5,000 rpm then stuggles to rev the will pull hard from 6 to 7...
ive checked, fuel pressure, vvt, all timing marks line up, exhaust back pressure, comp tested, all 6 are 140... swapped CAS over for shits n giggles...
dont know what else to do, please help