Alright guys I'm pulling my hair out trying to make WOT work in first gear without stutters/hesitations.
For context I have a 2017 Dodge Charger Pursuit 5.7 AWD that I have upgraded after having an MDS lifter collapse. I put in new Non-MDS Lifters, new Manley 2640 Pushrods, Mopar Performance Springs, JBA shorties, a 6.4 Intake with an MMX SRV kit, and a 6.4 Non-MDS Camshaft. I had never tuned a car before so I started by doing a basic NN tune using a wideband (installed on the left header) and adjusting injector mass, then went to Closed Loop VE/Speed Density, then Open VE/Speed Density, and am now doing the real HP Tuners AI based NN tuning to try it out. All that said, LTFTs are below +-2 with NN back on and the car feels dialed...except at WOT in first gear.
Ever since starting the car after the rebuild, seemingly irrelevant of tune, when I go through WOT in first gear I have 3-5 flat spots in the RPM curve where the engine seems to fall over, and the 0-60 is about half a second slower than before the rebuild (5.8 back to back vs 5.2 back to back). This only seems to happen in first gear. If I do a 30-70 mph rip in 2nd I seem to have no or very limited issues and it pulls almost cleanly. The hesitation happens around 3200 RPM, 4600 RPM and 5550 RPM as the main culprits. I have attached logs of runs with a screenshot of the data I pulled from them and a log of a higher speed run in 2nd gear. I have a lot of data so let me know if you need more.
Does anybody have any idea what is going on?
The only issue I know of right now is that cylinder number 8 has an exhaust gasket manifold leak, but that will get fixed next weekend. I have also seen up to -0.5 of a degree of knock retard at 5500 rpm on one or two of the pulls due to high IATs, but nothing consistent. I have tried isolating the trans, spark, knock, fuel injectors, and everything else I can via logs and I don't see any dips or consistent coinciding changes in knock or spark or anything besides TC Slip during these events. I could really use some help.
What else should I try to log or specifically look for when I get to work on the car next weekend?
Edit: Figured it might be important to add that I'm targeting .85 Lambda (~12 AFR E10) at WOT. Also thinking back on it, the car seemed to both make less power but stutter less when it was excessively rich like when I had first started to try to do open loop tuning. The car was idling around 12 AFR and dropping to 11-11.5 the WOT pulls were smoother, but slower. IATs were also about 10-15 degrees lower that day, around 80-90. Most of my tuning has been around IATs of 100-105.