B58 Load/Boost Target Oscillations under partial throttle (high gear, low RPM)

[mike6789]

Hi All,

I have self-tuned a map from stock using the Bootmod3 map editor. I am puzzled by some behavior I am seeing under partial throttle when I am in a low RPM range and high gear (like 4th gear from 2,800 RPM and ~60% throttle). You can see the log here -- https://www.bootmod3.net/log?id=6572106bfcd6f0422ff210bc

Can anyone offer some insight in to why my load target might be oscillating like this?? I have no clue. The car feels amazing under WOT in all gears, but is behaving poorly in partial throttle in this specific case I mentioned, you can really feel the car "surging" and it's not too pleasant. Here is a WOT log to show I'm not totally full of sh*t lmao -- https://www.bootmod3.net/log?id=65720d286862a64331578dfa ; I've found this to be way more performant than any OTS map I have tried.

My engine setup is mostly stock, I have new spark plugs with a smaller gap, splash of E85 in my Cali 91 tank (2.5-3 gal of E85), and a VRSF catless downpipe.

You can even see here in 5th gear the transition from oscillations to smooth once the pedal is closer to WOT and the RPMS are higher -- https://www.bootmod3.net/log?id=65720fa752baf04fb71abb36

Any help is extremely appreciated! I am pretty new to this and still learning. I would love to solve this problem

 

[mike6789]

Actually, even the TORQUE targets are oscillating; the only stable one is the "pre-drive-dynamics" one; does this mean something outside the DME is affecting the power -- i.e., the TCU???

 

[Dyyd]

Looks like your boost pressure is over the target, hence you get throttle closure. You have too much wgdc for this part throttle scenario.