Hi hoping someone with plenty of Dodge tuning experience can take a look at the attached log. Traction control was shut off in the ROM for the dyno. The pull was taken in 5th gear.
Problem - power delivery at WOT feels like surging, apply/release feeling, like it's coming from the transmission. I don't have any dyno graphs on my laptop at the moment but you can see the log. The car is using a Hellcat blower with an under drive pulley along with an electronic bypass for boost control. The issue is happening at any boost level from 0-15 psi. Fuel trims and WOT AFR close enough. I don't see any torque flags. Throttle angle stays constant. Ignition timing isn't being pulled to cause this and after getting the injectors dialed in, I also re-scaled knock sensors.
Originally the ECU was sent for an unlock to HPT by the owner and he was told that it wasn't factory stock (he's the second owner of the car) but he wasn't aware as to what had been done to the car previously. Since there isn't a segment swap function available, I built a new map set for it to reflect the mod list; 1200cc injectors, adjustable FPR with dual pump return fuel system set to 43 psi static, forged rods and pistons, new 6.4 block, stage 2 cam with VVT delete, and of course the Hellcat blower and TB with boost controller.
I don't have a stock read on the TCM programming so not sure what was changed in it previously. I made sure to raise limiters there as well to prevent the trans from causing issues while trying to figure out the problem. I ran out of time to further troubleshoot but need to go back through TCM tune to check still.
Ideas? I went ahead and pulled it off the dyno for now. Not finished with it due to the issues that it was experiencing. The 'expected torque' is far off from actual and demand torque but not sure if that plays a role here as to what's happening. Other things to note is that I tried a bunch of different strategies with torque demand and nothing changed. The boost is low in the log but again it's having power delivery issues at any boost level. Thanks in advance for any helpful input.
2015 6.4.hpl