Quote:
Originally Posted by 3-Wheeler
Some of the university students who design, build, and race SAE formula cars, have mentioned something that would help in this situation.
Consider that 1/3 of the engine heat goes to the radiator at what ever throttle position the engine is running at.
If you are pulling a large load up a pass in Colorado, and the engine is putting out 200 hp, then the radiator will need to dissipate 1/3 of that load, or 67 hp!! AND the hole for the radiator block needs to be sized accordingly.
|
just want to clarify this:
generally, normally-aspirated spark-ignited gasoline engines take the chemical energy in the gasoline and can only turn about 1/3 to actual power. 1/3 is wasted in the radiator to prevent overheating. 1/3 is wasted out the tailpipe as unrecovered heat. So if the engine puts out 200bhp, the radiator also has to dissipate heat equivalent to 200hp. Not that this helps us visualize what size hole is needed for that much heat dissipation...