" yes, it helped... still chattery, but quieter. Prob need another 100rpms. Always be present to some degree with AC on probably. "

" Interesting and definitely PID is a set of formulas that's tough to grasp for me. But what I understand is that error and manipulated value would still be boost and WGDC. So I thought the only changes would be trial and error finding P, I, D. Can you just reference an EBC control, or is this kept confidential by manufacturers.

so no change to the the hardware? "

" Yep, I think Tony was toting the negative trims as an indication of excess fuel but this was just his misunderstanding. Trims are the fuel volume difference between actual versus setpoint. The reason they can go positive when capacity is strained is due to DME not being able to calculate actual flow (falling pressure). "

" I can speak on the Procede... if you set piggy boost below DME then it will follow DME + about 1psi, so basically mirroring DME setpoint. I believe both JB and Procede return the DME setpoint back to the DME and manipulate when needed (like significant overshoot).

I'm curious what's needed for external WG. Currently both piggies (I believe) control the solenoids directly at same frequency as DME. What needs to be changed for external WG? My thought is that a PWM signal would be sent to a pressure bleed valve... very similar to current setup, but regulating pressure instead of vac. Does the piggy hardware need to be changed or the software control? Procede controls with 3D WG table and static PID, so you basically just adjust these values for the software I thought.

An EBC works very similarly I would think... throttle input, boost setpoint referencing DC table and PID based on actual. Is the difference the frequency? "