"if you fed them with boiled fuel they would overheat" It isn't clear to me that they would. I suppose if your cooling system was highly optimised the extra e

"if you fed them with boiled fuel they would overheat" It isn't clear to me that they would. I suppose if your cooling system was highly optimised the extra energy could tip the balance, or is that what you're saying? But then all ic engines would be cooled by their fuel, its kind of inherent to the process.