mike2016 Posted November 28, 2021 Report Share Posted November 28, 2021 Trying to improve boost control a bit. How do you get rid of that initial boost spike when it reach target? it overshot 10kpa (target 260kpa) Boost seems to drop slightly as RPM climbs. how much of an effect on spool up between 75% and 90% Stage 1 ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 28, 2021 Report Share Posted November 28, 2021 More derivative. You can think of derivative effect as "putting on the brakes" as you get close to target. Quote Link to comment Share on other sites More sharing options...
mike2016 Posted November 28, 2021 Author Report Share Posted November 28, 2021 got it. will give more derivative next test. I've seen tunes where P is much higher with also very high D. does it have the same effect? such as P = 1, D = 15 Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 28, 2021 Report Share Posted November 28, 2021 P varies a lot from car to car depending on how much DC change the boost control systems needs change boost. Too much P will give you a lot of overshoot. With too much D you will see boost fade away too early before it has reached target. Quote Link to comment Share on other sites More sharing options...
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