[Teutonic Speedra...]

Anybody know a real rough estimate or calculation from an engine book on how many btu/hr are introduced to engine oil based on rpm? I may just make something up, but we are trying to figure this out for a project for class.
:stupid:

[slowTA]

I would use the amount of heat generated by the fuel as an absolute maximum. Then just for good measure I would take 80% (IMG:http://www.frrax.com/rrforum/style_emoticons/default/unsure.gif)

You can always get the car warmed up then make a few quick blasts around the block, measure the before and after temps. Figure out how long the engine was at what RPM for WOT, get the total number of revolutions. If you have scanning capability you can find the injector pulse width and find the flow rate if you know the fuel pressure. You know the approximate mass of oil, if you don't have an oil cooler then you MIGHT be able ignore most of the convection running across the oil pan. If you have an oil cooler you can find out the ambient temperature and use a simple air to water heat exchanger problem. The speed of the air is just the vehicle speed. The thermal properties of fuel might be available online, but for a basic example I just did the internal combustion lab at school. I found the fuel values to be: specific gravity=.731, higher heating value=20,400 BTU/lb, density of fuel=45.62lb/ft^3, with an API of 62.

An extremely simple problem really (IMG:http://www.frrax.com/rrforum/style_emoticons/default/rotf.gif)