Hello, I am looking for some advice for best method of control boost.
Working on a 1.4L Turbo.
I have set the Boost Max Limit to 240kpa. And it will sometimes spike over the limit. It sometimes spikes and does some sort of cut. And then sometimes it will spike and pull real good. But on every pull that it does pull through and doesn't hit some sort of cut. The desired boost will start dropping and then actual boost seems to follow desired from there on out. But seems to be a bit out of control when it comes into boost.
So I am looking for the best method of controlling boost. And also how to keep it to carry boost all the way out to redline. After 5000 rpms, desired and actual boost keep dropping all the way out to redline.
I have upped all the torque limits tables under torque management. (Is it best to max those tables out or just set just high enough for torque management to not interfere)
I have also upped the driver demand table from 80%-100%. (Also same question, should I set those tables maxed out or set them to a actual torque number suited for these engines)(And also should I raise entire rpm range or just when boost full comes in on these engines)
I have also raised Knock Airmass up to 1g @ 0*. (Should I raise higher)
Should I need to adjust any of the following (Wastegate Open Boost, Base DC, Base DC Scav, Proportional Gain, Integral Gain, Derivative Gain, Pressure Delta Factor, Failure Airmass)
Should I raise Wastegate DC Max?
And how about the Turbo Overspeed Tables? I have raised the Overspeed Limit Min to .75g, and raised the Pressure Ratio Max to 3g. (Need opinion on whats best for those tables and also do we need to adjust Max VE)
Just wanting to fully understand how to control boost best on these ECUs, I have a wideband installed in the car, I have fueling and spark dialed in very well. Just looking to get a better control of boost and to fully understand the system. I have hit the max of the MAP sensor reading of 255kpa a couple of times which will max injectors out, so did not like that. So I did not have a boost gauge on it read the max boost, but was more than 22psi. And would honestly just want to command 240kpa from the moment I go WOT all the way to redline, and for the vehicle to actually boost 240kpa that whole range.
Thank you in advance for any tips/help/or ideas.