TunerStudio(3.0.28)/MS3x(1.4.0 release) EBC Issues
06-01-2018, 09:20 PM
#22
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Chiburbian, thank you so much for all of the help! It is currently storming here and is not supposed to stop raining for 4 days, but I will try everything you posted as soon as I can.
As far as the tune goes, I screwed up and did not save the exact tune that I was using when I posted that log. So the only thing I know for sure is what I put in my posts. I will not make that mistake again.
How did you interpolate to get that bias table from my data? Is that a feature in Megalogviewer that I just do not know about?
As far as the tune goes, I screwed up and did not save the exact tune that I was using when I posted that log. So the only thing I know for sure is what I put in my posts. I will not make that mistake again.
How did you interpolate to get that bias table from my data? Is that a feature in Megalogviewer that I just do not know about?
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06-01-2018, 09:46 PM
#23
Not sure which version of megalogviewer has the function, but I have the fullest feature set. It's called "scatterplots".
Basically what i did is create a scatterplot with the x-axis being RPM, y-axis as MAP, and the colors being the boost duty. In your case, you did specific pulls at 20% duty, 30% duty etc. That allowed me to see pretty quickly that say, 40% duty at 4,000 rpm came out to be 180kpa (without looking at the actual data.) I then took that 40% and entered it into your bias table at the 180kpa by 4,000rpm cel. I did this with a couple points that I knew, and then interpolated the places in between. Will it be perfect? No, but it should get you pretty close.
The next experiment is to do pulls allowing the closed loop boost to try and get your targets. before if you noticed, 40% duty might result at 160kpa at 3,500, but 180kpa at 4,400 rpm.
How it works is this...
Assuming your target is 170kpa at 77% throttle and above;
-you accelerate full throttle in say, 4th or 5th gear (depending on your trans)
-Boost duty will stay at 100% until it hits your lower limit delta, (30kpa in your tune above), or in real numbers 140kpa. Pretend for a second that this happens at 3,500 rpm. Boost duty will then look up what the duty SHOULD BE to reach your target of 170kpa.
-That number will be somewhere between 55 and 90% duty.
-Immediately, the closed loop boost algorithm will try and raise and lower your boost duty to actually hit your target boost, in this case 170kpa.
So, with the settings I gave you above, pulling in your 1:1 gear, I want to see what it ACTUALLY takes to get 170kpa, and I am hoping that closed loop will do it's thing well enough to get good data.
Start low on basic mode sensitivity slider. Raise the slider by approximately 50 a jump until it starts oscillating around your target. Then back it down by 25. You can raise it and lower it a little to fine tune it. Once you are getting reasonably close to your boost target, we raise the boost target to 180kpa, then 190 kpa. We use the ACTUAL boost duty number required to reach your target to populate your boost bias table.
I would also recommend raising your overboost number to something like 210kpa. At 195 it's way too close to your goal of 190kpa. It will hit boost cut just through normal variations in boost at full throttle.
Basically what i did is create a scatterplot with the x-axis being RPM, y-axis as MAP, and the colors being the boost duty. In your case, you did specific pulls at 20% duty, 30% duty etc. That allowed me to see pretty quickly that say, 40% duty at 4,000 rpm came out to be 180kpa (without looking at the actual data.) I then took that 40% and entered it into your bias table at the 180kpa by 4,000rpm cel. I did this with a couple points that I knew, and then interpolated the places in between. Will it be perfect? No, but it should get you pretty close.
The next experiment is to do pulls allowing the closed loop boost to try and get your targets. before if you noticed, 40% duty might result at 160kpa at 3,500, but 180kpa at 4,400 rpm.
How it works is this...
Assuming your target is 170kpa at 77% throttle and above;
-you accelerate full throttle in say, 4th or 5th gear (depending on your trans)
-Boost duty will stay at 100% until it hits your lower limit delta, (30kpa in your tune above), or in real numbers 140kpa. Pretend for a second that this happens at 3,500 rpm. Boost duty will then look up what the duty SHOULD BE to reach your target of 170kpa.
-That number will be somewhere between 55 and 90% duty.
-Immediately, the closed loop boost algorithm will try and raise and lower your boost duty to actually hit your target boost, in this case 170kpa.
So, with the settings I gave you above, pulling in your 1:1 gear, I want to see what it ACTUALLY takes to get 170kpa, and I am hoping that closed loop will do it's thing well enough to get good data.
Start low on basic mode sensitivity slider. Raise the slider by approximately 50 a jump until it starts oscillating around your target. Then back it down by 25. You can raise it and lower it a little to fine tune it. Once you are getting reasonably close to your boost target, we raise the boost target to 180kpa, then 190 kpa. We use the ACTUAL boost duty number required to reach your target to populate your boost bias table.
I would also recommend raising your overboost number to something like 210kpa. At 195 it's way too close to your goal of 190kpa. It will hit boost cut just through normal variations in boost at full throttle.
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