my boost Tee just serve a purpose as wastegate delay (the ballbearing-spring loaded port inside)
because if i leak air (to increase boost) using the boost Tee...straight away i'll get boost cut
plus...i'm using adjustable spring external wastegate....so just adjust boost direct at wastegate spring preload better boost control this way (because already delete electronic boost solenoid)
i sourced out this from japanese webpage.the translation for the mod would be "full time secondary duct opening".from what i understand from reading it is the merit would be the torque feel from 2000-4000 rpm range...