Here in australia they all recommend the Blitz SBC i-D. Dunno if it's expensive there in malaysia. But it seems that you can set the thing in auto mode, set your max boost .. and everytime you boost it will configure the gain and etc automatically ..
I encounter really loud vibrating sound from while accelerating in the rain..the sound comes from engine bay or the wheel...(im not too sure)...BUT....accelerating same place on dry sunny day...no sound or vibration...