Hello fellow enthusiasts, I have a question regarding the fueling maps of digifant 1. I was under the assumption that these maps contain the injector duty cycle values vs rpm and pressure. However, this assumed duty cycle seems to depend mostly on the MAP value, and not on the rpm. See the attached image: stock g60 fueling table. Why is it that for a given MAP value the duty cycle at low rpm and high rpm are (almost) the same? As rpm is increased, airflow is increased and more fuel is needed, so you would assume an increasing injector duty cycle. So what exactly is this fueling parameter here? Is it the duty cycle scaled with another value? And why is it relatively constant over rpm? Kind regards!
What exactly are you trying to achieve? Do you understand how the engine pumps air as the load/revs increases?
Hello Toyotec. As I intend to use digi 1 for my car I want to understand how this map works. Lets assume a fixed pressure ratio at WOT. Then one would only move in vertical direction in the table which I attached. As rpm increases, so does the airflow. Then one would need to inject more fuel accordingly to keep the AFRs in the correct range. Why am I not seeing this in the table? I would expect something like this: This makes me wonder if the values in the map are really duty cycle values or something else.
But you are asking the question and then attempting to tell us what you expect? Have you mapped a car before and do you understand how the engine breathes? I have mapped both G40 and G60 Digifant 1 single map and 3 map ECUs and have that very XDF that you are using. I can help but you need to help me to help you first.
