Originally Posted by
RobCat030
Torque tables is probably a good place to do it. It's hard to suggest changes without seeing the tune but I fully understand why you don't want to share. I mostly deal with turbo stuff on NA Tricore PCMs vs blowers, but the point where the turbo starts spooling is *sort of* similar to the bypass closing. I used to make a ton of throttle body data changes, these days I use the torque tables and put a huge gap between Torque and Inverse tables. Neither are ideal but at a certain point you gotta get the customer out the door. Can't make every car a science project.
Desired load is, loosely, a conversion of driver demand -> torque inverse tables. Then you use engine displacement to get a desired MAF value (you know all this, I'm just reiterating). In my general experience, both desired torque and load vs actual are used to adjust the throttle, but only torque is used for the IPC check. This is why the throttle can close without any IPC error. But that's not universal across all years and platforms.
I empathize with the frustration about logic changes. To me, it's a reminder that our understanding of this stuff is 30-50% *at best* until the day where all the information is on the table. My solution is to have a go-to strategy for every MY year, and I push that strategy to the car before I read it with HP. It saves a TON of headaches.