From what I can tell from logging, for higher PRs, a reduced WDKUGDN might be needed; it doesn't seem that at higher boost, the throttle is doing enough to prevent boost flutter when req load is near wg cracking. Can anybody else confirm this? With the WGDC at 10%, and stock WDKUGDN, boost is still building with vpsspls_w at minimum (.95) and throttle plate at 40%
I think if WDKUGDN doesnt represent the lowest angle where the throttle blade is not a restriction with boost reg off, things are going to get funny when boost reg comes on and you transition from wg psi to something higher.
Too low and I think you will feel a surge as it transitions, too high and I think you will get a bit of a deadband feeling in the pedal.
Also, the active range of vpsspls_w is definitely .95 to 1.0, where 1.0 is entirely wg controlled ingested air and .95 is entirely throttle plate controlled ingested air.
I would agree on the <.95 stuff.
But, I would say that >= .95 is entirely wg control. The (.95-.95)/(1-.95) is only there to keep the throttle blade from being a restriction in a manner that smoothly moves it to 100%.
