I just cycled one of my 5200/24C packs. I charged it up to until the voltage was at 8.44 while the charge was off. So the pack had 8.44 resting voltage.
Here are the numbers:
Regular charge which the pack has a resting voltage of 8.39
529 - 7.38 - 6.1
8.44 resting voltage:
544 - 7.40 - 6.3
So if you think 15 seconds of runtime with .02 higher average voltage will give you much better lap times then charging at 8.44 is the solution. I doubt that this can make a big difference on the track.
For those who see an increase in IR that is surely caused by the pack not being cycled for a few days. The last cycle numbers I had for this pack it had been cycled a few times that day.