Since the BOV is before the MAF, if it is a leak, it is a metered leak.From what I'm understanding, your blow off valve adjustment may have introduced a leak that's bringing you back to the "right" of the surge line. This will work fine, for a speed density tune. It may work for a MAF if it's a metered leak. If you turn up boost eventually, let us know if you encounter this again. If you have tuning issues, keep this in mind as a possible issue.
I only say this, because during full throttle, your BOV doesn't do anything, and any adjustments shouldn't change full throttle characteristics.
The BOV thing is something I read online and decided to try, I don't see how it would effect WOT either. The BOV is a Turbosmart VeePort Pro.What bov Do you have? I don't see how the bov would affect anything. It should be closed under boost.
Or are you saying the bov was fluttering when you released the throttle, so you softened it up?
I looked at the log and don't really see anything jumping out. Boost looks pretty solid at 8psi from 3800 until you let off at 4100?
Was this a wot pull? The tps only shows like 48%
The log was not a WOT pull, I didn;t go heavier throttle when I heard the surging starting, and backed off after a bit.