Hi everyone !Did someone know the difference between DI and IDI dynamic advance ? Yes at one time there was a guy in Romania that knew all about that difference but then the Turks moved in and took it away from him. Sorry, I am trying to figure out the question. Do you want to know at what RPM the advance starts to make a difference? The total amount of advance? Or? The way in which it gets delivered to the injectors.I think i read somewhere that IDI timing start to move later than DI timing... Got a source on that read?Also, anyone know what is the best compromise between advance and RPM ? Again trying to figure out the intent of the question, Do you want to know if you run your engine at 2500 RPM does it advance more or less than if you upshift and run it a cruise at about 700 RPM less but less advance?How many degrees of advance by RPM ? That might be a curve that a Bosch manual might give to you. But remember that the graph will be of a new IP and probably being fueled with the old style of diesel that had all kinds of nasty stuff in it like lubrication, Cetane for power, and was generally more dense and gave a better pressure at a lower idle. Thanks you YOUS welcome.