Yep, folks have been "icing down" Alta battery packs between motos since they were released. It's probably not very effective at getting heat out of the core of the pack and all it takes is one sensor showing overtempt to shut things down. It's better than nothing, however. I'd like to see a feature where the pack has cooling tubes (ala Tesla) throughout and between motos you'd pump chilled water through them to cool the cells. Minimum weight hit. The next logical step would be full time water cooling of the pack, obviously not good for weight!
There are 18650 cells that can discharge at the rates required in map 4 and beyond but with higher "C" ratings comes different internal cell construction which lowers the capacity. So it's a trade-off. However, even these cells would suffer the same "cumulative" heat soaking issues if you can't get the heat out of the pack between runs.
Alta already tried but couldn't get into Arenacross, did it?
They say it’s good to go for 30 minutes in ten meters of water 
