So a few questions...

The N75 is what would normally detect the boost level (or the boost level is communicated to the N75 from some other sensor) and the N75 in turn communicates to the wastegate to bleed off boost?

Does the boost spike signal the N75 to bleed off boost resulting in the under shoot? And if you control the spike then in effect you prohibit (or discourage) the N75 from excessive bleeding which result in the undershoot?

You said " assumes you already know the desired boost curve of the chip". Since logs are subject to a gojillion variables inherent in each car that logs..even given the same chip manufacturer, where do you get the accurate baseline information for a particular chip? For instance, if I want to use a set of data logs for the APR 93 code to set an MBC, or to see what level of boost spike/undershoot, how do I know it is what the manufacturer intended as opposed to what someone elses car is doing with the code??

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