Cobb vs UpRev

wstar

That is kinda weird. Looking at the rpm gaps, which are 400, 800, 1200, 800, 400, 600, 200, this is my best guess:

They expect you to tune some other engine parameters to get the big center area (1200rpms from 4000 -> 5200) about right for that whole range, and then you see the 800 and 400 gaps arranged symmetrically around that, basically meaning "the further you get away from this center, the more adjustment you'll need here". The oddball part is the very upper end, which breaks with this symmetrical hill pattern and steps out by 600 and then only 200.

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