Hi, my understanding is that you can run the wastegate at spring pressure as a way of limiting boost. I'm not sure how the XEDE would handle that, but the scenario where you might want to do that is - as an example - I've fitted an alternative turbo and I'm concerned about it overboosting in response to the tune's wastegate duty cycle. I want to run the stock tune and avoid overboost conditions that the alternative turbo might create. This idea was fleshed out as a thought experiment only while planning an ATP GTX2867 turbo swap.
The two solutions are to (1) bypass the boost control solenoid altogether by rerouting hose or (2) electrically switch the boost control solenoid permanently into the spring pressure state. A dash switch that switches the wastegate between spring pressure and ECU command pressure.
The electronic solution has not been tested to my knowledge, and I'm not confident enough in mechanical detail to give instructions, but rerouting hose to limit boost has been used successfully as a temporary measure.
I intend to test the electronic solution when I get around to aforementioned turbo swap.
"Blue Meanie" 2007 Aurora Blue MPS 3 - 18x8.5+44 SSR GTX01 - 235/40R18 Michelin PS5 - 3.5" ETS TMIC - CPE stg 2 mount - HKS/CPE BPV - 2XS inlet - 2XS short shift - Corksport turbo manifold - HT 98 octane tune - Leather/Aluminium handbrake - Momo shifty knob - 7" touchscreen - JDM Mazda Retractable dashtop screen assembly - Bespoke Raspberry Pi Android based GPS/Carplay and instrumentation - 36AH reserve battery and C-TEK isolator - TEIN Street Advanced coilovers 1" drop - Superpro bushings - 220Kw/410Nm.
"Lipstick" 2013 Velocity Red MPS 3 - 18x7.5+48 Enkei RPF1 -225/40R18 Federal RS-RR - CPE TMIC - COBB inlet - CPE stg 2 mount - COBB Stage 1 98 octane tune - COBB shifty knob - 2XS short shift - 2XS turbo manifold.