Sorry guys and girls. In my excitement I got things mixed up. The supercritical heated injectors are on another link and it's 300*C not 500*C.
Product – Fuel Injection System | Transonic Combustion.
Seems the heated fuel thing is catching on with OEM suppliers. Maybe we'll see some on new cars soon. Do a search on supercritical fuel injection for some other implementation ideas.
Again, sorry for shooting before aiming.