i hope you dont have a standard turbo otherwise it wont last long with no dump valve
is that foot flat down ..
it sounds like its boosting too early
lol it has got dump valve and yes its flat to bottom???
tps sensor
whats that mate?
throttle position sensor
ive got a spare il try tomorrow thanks
if uve got a gt25r that noise is the roller bearing spinning after... thats normal... but i would check ur cam and cam timing as that sounds poop.. its not reving up nice at all.. good luck