Yet Another Radiator Cap Pressure

[EVO-V]

you'd still need a pressure cap. it not only raises the boiling point, it also concentrates the heat to the pressurized coolant to dissipate more heat in the radiator. it also makes the water pump more efficient by reducing or eliminating pump cavitation- a result when a liquid is whipped repetitiously and rapidly creating foam.

Nope you won't. If by the time you even reach the boiling point using a waterless coolant, your engine would have long shut itself off.

And since you really don't have air, assuming your cooling system is properly primed, there would be no cavitation issues for the pump to deal with.