I think I'm going to test out a Buell 1125R

Tmall · 07-18-2009, 11:58 AM

I'd like to see some numbers on the running temperatures.

I think the reason most air cooled engines feel so much hotter is because the heat is being dissipated between your legs. Whereas on a liquid cooled bike, the rad is placed away from you. This way you don't feel the heat transfer taking place.

I've always thought that the idea behind liquid cooling was to have a more consistent temperature throughout the entire engine allowing tolerances to be more exact which in turn would allow for a more powerful, efficient and reliable engine.

Water transfers heat at approximately 30 times the rate of air. But, at the same time your radiator is air cooled. I understand the concept that it's in an optimized position for air flow, the surface area of the cooling tubes is increased and the volume of water flowing through it definitely allow it to removed more heat than your typical air cooled engine. I would just like to know how much more, and what the average running temps are of air cooled vs liquid cooled bikes.

07-18-2009, 11:58 AM	#34
Tmall Aspiring Rapper Join Date: Nov 2008 Location: Halifax, NS Moto: '12 CB1000R Posts: 3,569	I'd like to see some numbers on the running temperatures. I think the reason most air cooled engines feel so much hotter is because the heat is being dissipated between your legs. Whereas on a liquid cooled bike, the rad is placed away from you. This way you don't feel the heat transfer taking place. I've always thought that the idea behind liquid cooling was to have a more consistent temperature throughout the entire engine allowing tolerances to be more exact which in turn would allow for a more powerful, efficient and reliable engine. Water transfers heat at approximately 30 times the rate of air. But, at the same time your radiator is air cooled. I understand the concept that it's in an optimized position for air flow, the surface area of the cooling tubes is increased and the volume of water flowing through it definitely allow it to removed more heat than your typical air cooled engine. I would just like to know how much more, and what the average running temps are of air cooled vs liquid cooled bikes.