i ran stock boost, 10 psi , 15 psi, 18psi (1.2bar), 21psi and 25 psi all that on the ct9 i will tell you that ct9 is a soldier will hold a lot and the higher you go the more you will fall in love with the glanza trust me and about the turbo life our car is more or less 12 year old so if a seal give away and the turbo start smoking it wont be a problem cuz when the turbo was working i had fun so i will change them and keep going