I have been researching different cooling systems & solutions and came across a company called C&R Racing that makes a "Pressurized Cooling System''. Seems it is intended to increase the pressure in the radiator, thereby allowing higher temperatures.

According to the company's website:

"The pressurized cooling system controls what happens when temperature rises and water expands.
It is equipped with a pressure accumulator that controls air space and acts as an “air spring”.
At expansion the “air spring” collapses rather than pushing water out of the radiator cap.
A pressure relief valve replaces the radiator cap in this application. The benefits include higher operating temperatures and smaller duct work openings resulting in greater control of water contact in critical areas of the engine.
The pressurized cooling system is used by IndyCars®, Formula One and NASCAR®. The system is adaptable to any water-cooled racecar."

Anyone able to explain the theory behind this?? Would this be helpful for an F/I engine??

 

Boiling point increases with pressure increases up to the critical point when gas and liquid properties become identical. So i dont much about the system you are asking about but that is theory behind it.

 

Seems this is used in racing applications, but I'm not sure if this would be useful on the street.

 

It lets you run higher coolant temps so that your radiator doesn't boil over which is a good thing. The problem is It doesn't bring down the coolent temp down either so it make it useless in street car.

 

All cars have pressurized cooling systems. This one might make for a higher pressure but I doubt that would help for a street application. Higher pressure would certainly put additional stress on your radiator hoses.

 

Evans NPG+ essentially runs without pressure (few psi). No water, no hot spots, no air pockets from vapor formation, high boiling point...

 

I run a pressureless system with an RX7 rad cap

 

^you car overheating is due to fan problems though right?