This is the stock hood graphs, right?
More data is always useful, but I think the most important differential is going to be coolant temps. If the hood vents are working correctly, airflow through the radiator should increase substantially (both stopped with rad fans on, and especially at cruising speeds) from the pressure relief behind the fans, and that should in turn show up in the coolant temp graphs pretty noticeably.
Knowing how good flow affects everything else related to bay heat and all that would be nice, but if the coolant temp drops you know you're moving things in the right direction and the rest is just details.
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