Hi everyone,
Trying to get rid of a transient lean tip-in and rich tip-out effect. I don't really care about the rich tip out but the lean on tip in can be felt as kind of an initial dead spot. I attached a log file and my current tune. There are a few tip in events in there- some were worse than others.
QUESTION IS:
What tables in the transient tab would I alter, and in which direction, for this particular scenario? I understand only the basic concepts of the fuel wall "puddle" effect - and I am trying to understand what the best thing to try to adjust would be before I just go turning knobs.
Background info: Its a work-in-progress tune so don't beat me up! I don't have ignition dialed in yet, so yes occasionally I'm picking up a few degrees of knock retard. Its my next thing to fix once I get this transient figured out and then turn the narrowbands back on. My VE is like 70% there and the MAF is currently pretty good. So you'll notice in the log I am running about 5% error in commanded vs achieved EQ in steady state, that just is what it is for now. I may go back and dial it in closer this winter. I just got sick of fighting zone boundaries and everything else VVE.
Engine is a 6.0L running on an E38 ECM no VVT or DOD. Injectors are out of a L96 flex-fuel truck (12613412 50lb/hr)@ 58psi on the rail with a 450lph walbro pump. I think I have those injector tables right in my tune but honestly not sure! Wondering if some of this tip in/out is due to a discrepancy in injector timing vs valve event from the different cam. Has CNC ported 799 heads, Gen 4 intake with K&N and straight pipe, cam is a mild 219/228, 112 LSA. CR is ~11.3:1 Narrowbands are turned off, DFCO is off, MAF and VE and Dynamic Air are on. Trans is locked in 2nd gear, pulls are from a stop, or near stop. Converter stall is around 2500rpm-ish.
Thanks for any insight! There are lots of posts I've searched and read - but mostly theory related, hoping for advice specific to whats observed in my log.