Ecu can be set to retard the spark if water becomes too hot, but that just heats the water more due to less energy being transfered to the crank instead, thus the same fuel energy is wasted into the water jacket.
As you rally drivers will know, on a traction limited stage you may not feel a loss of say, 20% actual torque and thus the engine could be being damaged further by your not noticing.

Could always add far bigger injectors then we can do something with the fuel side of things instead, but at way over 9:1 and with 40psi, there isnt much fuel left to fooking add on the current setup....

A temperature related light on the dash is the way forward IMO.