Originally Posted by
sssnake
GHuggins,
Thanks, for your comments. I did go with flow matched Deka shorty 60s. I thought they were fairly well known and characterized by Greg B's data set (which I am using). I do understand the IDs to be much better but the issues I am seeing seem to be in the commanded piece vice incorrect fuel delivery. The MAF and VE show one thing but cyl air shows something different. It is my understanding (I'm not saying I that I am not wrong) that the cyl air and/or dynamic airflow is what the controller uses for fueling commands. If this number is wrong, and mine appears to be, I'm not sure how more accurately characterized injectors would help. I am a newb but I am also an EE that has designed and built control systems and this appears to be a problem with the airflow/cyl air estimation to me. I mean AFR is not necessarily a complex thing once you accurately estimate the amount of air in the cylinder.
I forgot to mention that I am using a manifold referenced fuel system to get rid of some of the variability in the injector flow (one less variable). I would think this simplifies the injector portion substantially. I have checked the differential pressure across the injectors and it seems to be very consistent.