I thought I would remind everyone the monumental challenges of a constantly cycling battery, in the Florida environment, to temper expectations. I am fully confident that any battery company (of which I consider is Tesla's core competency), has deep concerns of heat rejection (which we called Re).
To run a limited duty-cycle, even given the highest temperatures in the middle of Florida summers, is possible. BUT, there has to be limited duty-cycle or heavy heat evacuation to make the application feasible. While we, including myself, would love to see an energy storage manufacturer give a sponsorship to the speedway, I would really temper these expectations.
The way I see it you either have to oversize the energy storage and run a very conservatice duty cycle or add more vehicles that have adequate "off-time" to cool down and not experience an over-pressure/temperature threshold.