I recently had a member on another forum send me a custom tune from their truck (same year/engine) and I was checking out the comparisons. Both of our stock reads were identical. I don't want to work towards copying it until I understand what the changes are and how they affect the engine so I can slowly start working towards them. Here are the main differences and how I believe they affect the engine. Let me know if I am on the right track please. It has many changes so any advice you can give me is helpful since this is going to be a long road of learning. Here is the main list:
Desired max air load (+.4): sets the scale higher for higher than stock values from air flow modifications?
I?m assuming map max/ map vs AirMax, and act is all along the same idea of raising limits?
For the fueling limits, it has the spray ending later time wise and heavier duty cycle for additional fuel? Is this for additional fuel and cooling purposes also?
I see PE starts earlier pedal-wise and also has a lower delay. Shows it running a little leaner than stock PE at lower rpm but richer than stock PE at higher. What advantage for the variance?
It looks like the temperature protection for the exhaust manifold is eliminated and the limits for the cat and O2 are set about 10% higher?
Engine rpm limiter is slightly higher and I?m not understanding the abbreviations in temp rpm cutoffs.
I?m trying on the timing but it seems complex. Looks like fuel/lambda and IAT timing is retarding slightly for the most part. Some minor advances under mid rpm. Not sure what the load thresh limit is. It also shows no corrections for MBT? It shows cylinder trim is advanced at higher rpm?s by 2 degree? Cylinder pressure is also increased slightly at higher rpm?s.
Knock retard seems like a lower retard rate at lower occurrences. Also seems like recovery rate, fast rate, and shifting rate is slower at 1 degree at a time. Retard limit is also higher at max load rpm?s. Not sure what octane clip is. Knock learn is set to higher rpm?s and load for higher range learning.
Highest value engine torque calculations are set higher?but only top load value. Seems like all torque maxs have been increased about 20%. Map pressures have been increased at higher loads also. Not sure about that one either. Same with wheel tq error.
I understand pedal characteristic changes and don?t think Baja is an option (non-raptor for me). Looks like torque launch is higher at higher pedal %. Driver demanded torque is raised at higher pedal % also. I?m not sure about the pedal map ratios.
I believe these are all the changes. I?m realizing there?s a lot more to it than first assumed. I?m trying to work one step at a time as I go forward. Any advice about these would be appreciated.