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Old 11-12-2017, 08:50 PM   #13
Scooby Guru
Member#: 140444
Join Date: Feb 2007
Chapter/Region: NWIC
Location: Near Seattle, WA
05 Stage Free LGT


If it overshoots and then oscillates, turn down the gains.

If it overshoots but doesn't oscillate, you need less WGDC in the range before the overshoot happens. Whether that means turning down the max or initial WGDC depends on what you find in the logs. If it's not hitting the max, then obviously you need to turn down the initial instead.

Also, consider setting the gains to zero, and tuning boost as best you can with just the initial WGDC table. Then set the max to about 10% more than initial, and put the gains back, and see how that goes.

Also, consider a hybrid (solenoid + MBC) setup. It makes boost tuning really simple, and it's nice to be able to dial in whatever boost level you want just by turning a knob. To tune different ranges of the fueling or timing tables, or to make the car more docile for a valet, or to go back to minimum boost in between changing something and finishing retuning, etc. There's a sticky thread on hybrid boost control here, I think it's a great way to go.
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