AVCR- Boost overshooting in relation to Feedback Speed
 

Hey guys, this mostly is the section for those running high boost, and many of use this b/controller. I have mine running pretty good for the most part but I have one problem.

In 3rd, most times it will hold boost where I have it set to, but every now and again it will over shoot after a 2nd to 3rd shift. It seems to relate to the rpm that In shift at. If the 3rd pull is done from a lower rpm (4000) at WOT, it will not overshoot, however, it tends to overshoot if WOT is done from higher rpm, above 5000. Would this be caused bu the Feedback Speed.

Also, if the boost is overshooting should the F/B speed be lowered or raised? I have seen conflicting opinions on this.

The feedback speed is the controller gain. Too much gain can cause overboost or oscillations, but a lot of that depends on what the baseline duty cycle is set to. If the baseline duty cycle is set too low for the boost target, the feedback system can go nuts.

For diagnostic purposes, turn all your feedback speeds down to the lowest it will go and report back (remember what your previous settings were).

Reduced the feedback for 3rd and it now holds the boost.