Most “v” block engines even if they are liquid-cooled direct more fuel to the rear cylinder(s) to cool the head, either with larger carburetor jets in older engines or with software in newer ones. If you think about it all ICE are cooled by fuel; if you fed them with boiled fuel they would overheat.
"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.
