This snippet is about 700 frames, or approx. 7 seconds.

Starting from left, with about 2% to 100% throttle (floored!), you can see the transmission downshift into first, as RPM and VSS start to climb. Then as PCM calls for tranny to upshift into second, note the spark advance - it goes from the +25 range to -5 for a FRACTION of a second as the tranny shifts, as indicated by the RPM drop. Also note the (insignificant) 0.4 of KR.

Those who think TM is a major ET limiter or HP killer, can see why it's not that big of a factor, and why leaving it alone, if modifying your PCM program, is a good idea for the life of the car.

Now if you have substantially modified the drivetrain.....