One thing I'd advise is if you decide to use alarms in your data system/dash to auto shutdown that you create a dual-channel alarm strategy where you have two sensors or another way to back into the data for a sanity check. Over the years I've seen far too many races lost when a team stops the car and finds out either the sensor failed or a wire fell off or was destroyed with heat.
Fire suppression is another area where this strategy is handy. It's great to have an onboard system but also have access to a handheld one can often put out the fire. The onboard systems generally don't do this as they are mostly intended to buy the driver time to bail out.