- Fri Apr 02, 2021 6:37 pm
#49434
My current setup is a Ford 5.4 32V V8 with a T67 turbo and E85 with a Speeduino 0.3 board. I'm on December 2020 firmare. I recently started refining my tune and one of the things at the top of the list was to dial in closed loop boost control.
What I've discovered is that when using closed loop boost control the Speeduino will not trigger the boost control output until MAP exceeds 100kpa. That's fine at sea level but less than ideal at elevation. My baro readings at my elevation are in the low 80s.
In my case the result is having to rely on spring pressure to hold the wastegate shut between ~82kpa and 100kpa. This is potentially problematic when running a very light wastegate spring.
What I propose is activating the boost control output as soon as MAP is greater than BARO instead of waiting until MAP reaches 100kpa.
What I've discovered is that when using closed loop boost control the Speeduino will not trigger the boost control output until MAP exceeds 100kpa. That's fine at sea level but less than ideal at elevation. My baro readings at my elevation are in the low 80s.
In my case the result is having to rely on spring pressure to hold the wastegate shut between ~82kpa and 100kpa. This is potentially problematic when running a very light wastegate spring.
What I propose is activating the boost control output as soon as MAP is greater than BARO instead of waiting until MAP reaches 100kpa.