Jokeman you hit it dead on the spot.. that tech guy is exactly right... most people think that 0.5 bar is too much boost but its ok on stock motor with a few mods... its after when you build the motor that you can run 1bar daily driven... Now it really depends on your definition of a built motor but if its fully build as in sleeved,pistons, etc, etc, etc then you can run close to 1.5-2 bars if you have a good fuel management system... good luck...