Rule of thumb (though sometime it seems to be opposite)
1- If boost spikes and then falls off (below target boost); raise Duty Cycle and Target.
2- If boost spike above target and then falls back down to target; lower Duty Cycle.
3- To get the max boost the soonest - raise the start boost pressure (when it starts to open the wastegate) until you get a small spike. Then lower Duty Cycle.
If Boost spikes above taget; then falls below target - raise target and lower duty cycle. If it still won't hold target - then you are out breathing the turbo at that PSI.
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