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Interesting. Mostly your timing looked as expected, but heat soak was taking its toll in the multi-gear final run. There were some times when you got boost fast even in lower gears, but that first and second higher gear pulls in the long file was bad...around 2.5 seconds to get full boost going from 2500-3200rpm. To me that's laggy for stock turbos and it wasn't timing. Since it's not doing it all the time I doubt it's a leak or a restriction. I wonder if one or both of your diverter valves has a leaky spot in it that you only hit sometimes? I have a similar problem lately and am wondering the same thing for myself. It would also be possible for one of the wastegates to not be completely closing sometimes, but that seems unlikely in my case since the dealership went through my system and replaced one turbo recently. Oh yeah, one other thing, the vacuum hoses that feed the vacuum canisters that run the wastegates might also be a possibility. I'm not aware of any other possibilities.
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