Here is my problem. I have been running in closed loop for the past several weeks but since my boost was not tailored to this car, I decided to tune my PID settings. The boost hadn't been steady to my satisfaction and I figured it was time to start fine tuning.
To start with, I switched over to open-loop and set the entire table to 100 and did a pull. I immediately hit boost limit. I then switched the polarity to inverse and tried again. Now I was essentially on wastegate.
I then set my P to 100, I to zero, and D to zero.
I did a pull. almost immediately I hit my boost limit of 175kpa. I upped my P to 150. Same thing. Finally to 200, and same result.
What could be causing me to immediately hit boost limit in closed loop so quickly?
However, when I originally had my PID set to 22,20,70 and normal polarity I was fine, if sub-par.
I am using a new style DIYautotune boost solenoid.
Any thoughts? I'd really like to start turning the boost up slowly and maybe doing some gear based boost stuff but until I get the closed loop stuff working perfectly I don't think it's the right time.
Be careful using settings from ebc tuning threads esp for ms2. Older msextra firmwares were written such that less duty = more boost. The latest versions have been changed so that more duty = more boost. If the polarity and/or open and closed duties are backwards it will overboost regardless of the pid settings.
The idea is to start by getting 10psi as soon as possible and ride it to redline. From there, add a pound or so at a time while working on my tune. My eventual goal is about 220lb/ft torque and whatever HP comes with it. You think I would be better served upping my boost target to 175kpa or so while tuning?
By "eventual" I mean the max I am comfortable with until I build an engine.
Should I be switching my closed and open duty percentages as well since I a running "Normal"?
Tried working on it during an hour long drive home on country roads. Unfortunately, I hit the + button instead of the = button. I wanted to set my target boost to 62kpa, instead I set it to a target of 330ish kpa with my over boost set to 173. No wonder it wasn't acting predictably. Back to the drawing boards tomorrow.
I was right about stuff being fubar. I checked my project properties and it indicated I was running MSZ3 .262 or something like that. I did a "check for ECU" or whatever that button was and it came back with a firmware of 1.2.1.
So I have been running a mismatch of sorts between what tunerstudio thought I was running and what I actually was. This might have something to do with many of my random minor problems.
Brain: If I was using alpha code where I would be running normal as opposed to inverted, would I still be keeping closed = 0% and open = 100%?
If I were to start over with Alpha code, my settings should be to start:
Output Polarity: Normal
Closed Duty: 0
Open Duty: 100
Start P at 100 etc...
Am I better off just going to 1.2.3 and running inverted for now to minimize having to make other adjustments?