Closed loop @ WOT,,,,I asked this question on a Facebook 6.4 Hemi build forum & some professional tuners replies were, WHY would you want to do that, if you know how to tune you dont need it, that is BS in my opinion, does anyone know of a way to possibly put wideband O2 sensors and or a hellcat PCM swap in a 6.4 hemi, or some way of doing this without having to go to a Holley efi PCM, the Hellcat does it from the factory for a reason.

I mean the reason is, fuel control at that load and RPM rate can get tricky. Obviously the first thing is the ECU architecture has to support a wideband, the second is it needs the sophistication to be able to react properly to WOT change demands. IE needs some sort of PID or other control scheme that you have parameter access to, to tweak if need be.