limiter

Hi guys, I’m trying to optimize an OTS-only pump-gas setup around the actual knock limit of the fuel, rather than just running the strongest available map and letting timing corrections manage it. The setup is B58TU, stock turbo, stock fuel system, catless downpipe, running Korean premium pump...

I had seen someone post their dash on Facebook and I noticed that on his he had a line between the 6000 and 6500 mark. Is this like a break in period thing? Was it something coded in? The curiosity is killing me and I have yet to see it literally no where else. Not even car review videos on youtube.