halo, all friend here, i m newbie on skyline, i m facing some problem with my R34 GTR, my car is all stock condition, i had only change 3'' exhaust, but not yet tune ecu, so now i face problem is my turbo boost very slow, the turbo seems like run very slow, when i saw at the display screen there, it increase very slow, when i run 5000rpm , it only go to 0.4 bar, but when i try my friend R34 GTR stock turbo, it up very fast, even 5000 rpm already reach 0.8 boost. so now what is the problem of my car? confuse...can someone help me please...
thank you.
thank you.