GunMetalR33, when i had my GTRS turbo installed and producing the same power as you on 1.3bar (19spi) i realised after a it got a bit colder i got slight knock. only way i detected this is on my dial display. i dont have a hand controller but i could not hear anything so it was not pinging. would only happen at high rpm. the tuner reduced the boost, richened it up and took timing back few degrees and it made 230@the wheels on 1.2 bar and does not ping anymore. I was told that my exhaust manifold (factory) was too restrictive for the power/airflow. i have just added cams and plenum and new manifold so i will see how it goes back on 19psi now. Ill try repost next wednesday when they retune and let you know.