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freebeard · 06-07-2016, 02:10 AM

I agree with the conclusion. But surely the most action is taking place 90° after TDC, when the lever arm on the crank throw is at a maximum?

https://www.google.com/search?q=air+vs+water+offroad

Scanning the result here suggests that the advantage goes to water-cooling creeping in traffic or over boulder-sized rocks.

Old racing Porsches started with air-cooled cylinders and water-cooled heads. Some interesting discussion here:

http://rennlist.com/forums/996-forum/202717-what-technical-innovation-led-to-porsche-going-to-water-cooled-engines-on-996-a.html

*noise reduction
*Four valves per cylinder for emissions reasons doesn't leave room for cooling fins
*air-cooling is really just oil cooling anyway
*...and, yes; of course, longevity.

06-07-2016, 02:10 AM	#38 (permalink)
freebeard Master EcoModder Join Date: Aug 2012 Location: northwest of normal Posts: 28,707 Thanks: 8,148 Thanked 8,925 Times in 7,368 Posts	I agree with the conclusion. But surely the most action is taking place 90° after TDC, when the lever arm on the crank throw is at a maximum? https://www.google.com/search?q=air+vs+water+offroad Scanning the result here suggests that the advantage goes to water-cooling creeping in traffic or over boulder-sized rocks. Old racing Porsches started with air-cooled cylinders and water-cooled heads. Some interesting discussion here: http://rennlist.com/forums/996-forum/202717-what-technical-innovation-led-to-porsche-going-to-water-cooled-engines-on-996-a.html noise reduction Four valves per cylinder for emissions reasons doesn't leave room for cooling fins air-cooling is really just oil cooling anyway ...and, yes; of course, longevity. Last edited by freebeard; 06-07-2016 at 03:22 AM..