Sector 3 is T5-6, the long right before the final left back on to the oval. Like T2 and T7 there are multiple ways to take this one. It is wide, requires an abrupt change of direction coming in and tightens up a lot as it becomes T6. Different cars seem to do best with different lines and you can see that in the videos from Jim and Tom. In the bottom section of the screenshot below we see the two fastest examples from each with Jim ending the prior sector (T3) slightly faster but slows more entering T5. From there they both scrub some speed despite being at least part throttle. In the upper graph you can see that Jim's lateral Gs fall with his speed to below 1.0 while Tom maintains 1.1G. In the video you can see Tom gaining and also that his line is different. As they go into T6 (where it tightens up is T6) Jim is back on the throttle a bit earlier and gains back just a bit on the short run down to the brake point for T7.
So is this is case of the theoretical cornering advantage of the lighter car? Impossible to say for sure because they did take different lines and they were on different tires, but in other corners Jim consistently pulls sustained loads of over 1G in lefts and 1.17-1.2 in rights, so it seems likely that with a different line through here he could equal Tom's pace even with his seemingly inferior tires.
We look at this sector as a case where the speed through the corner is more important than exit unless you have someone looking to dive down the inside for T7 if they get the slightest run out of T6. We feel it out early to see where it's happiest through the first half (T5) even if it doesn't leave us ideally set up for T6. Sometimes it ends up more inside for shorter distance and sometimes it's a wider line making a short straight between the two for a higher average speed.
Zero responses so far about any of this. That's fine I guess, but we were expecting some questions or different interpretations of the data. I know, it takes time and most probably don't really care, but I thought maybe some of the people Kyle says think the same way he does would offer constructive input rather than just taking shots at us offline.