whats the difference?
whast the difference between air and liquid cooling? and which one is better????
Well lets see sitting in traffic and the beast is overheating. Id guess you got air cooling.Sittin in traffic and your fan kicks on and you got a bike with a rad and shes trying not to over heat.Ive been stuck a few times with the fan runnin with the weather and traffic problems these days. Just wish I could pump some of that coolant threw the leathers.hehe.If you go to a bike with a cooling system you will be adding a considerant about of wait.
An air-cooled motor relies on cooling "fins" on the motor to dissipate heat. (and sometimes a little radiator-like "oil-cooler" to help too) A water-cooled motor keeps its cool by running water-based coolant through it which dissipates the heat through a radiator and usually a fan.
Basically, an air-cooled motor has no radiator or coolant, just oil. A water-cooled motor has oil just like the air-cooled one, but uses the water-based coolant to keep the temperature down.
My bike is air-cooled and although it's a more archaic design, it's pretty fucken reliable. Water-cooled bikes are generally able to make more power for their size since they can run closer tolerances and shit like that.
In the real world, for you, to put it very simply: water cooling is most often the better choice.
As to the different cooling system methodologies and all the pros and cons that could fill a book or really a library (it has). Google!
People pretty much got it covered but i'd like to add :
Generally Air cooled motors are noisier by nature(loser tolerances and no water jackets to dampen the noise).
Air cooled motors would be much easier to do a top end rebuild on.
Air cooled motors are a bit higher maintenence-more frequent valve clearance checks and good to change oil more frequently.
Rock bottom here I come
Air cooling vs Water cooling pros and cons
Pro - less moving part, less costly, less complex
efficient at highway speeds
Con - doesn't work well at city or stop and go speeds
engines experience vast temperature ranges and likely wear more quickly
should have motor oil changed more frequently
Pro - Maintains very constant engine temp, prolonging life and easier to tune for
longer motor oil life
works well at stop n go, city and highway riding
Con - Many more moving parts
Coolant needs to be replaced from time to time
More weight carried on the bike
Given the choice I would go with a Water cooled bike.
Well here we go! The cooling thread has reared it ugly head (again)!
Water cooling is not necessarily heavier from the point of view of horsepower per pound. Look at the stunning low weights & size of the latest liter bike engines and ask yourself if they could be that light, and reliably produce that much power, if they were air cooled. Let alone wrapped up in plastic!
I would also maintain that air cooling is not a guarantee of less maintenance given that water cooling has the potential to have an engine with closer tolerances that runs within a tighter engine temperature range.
I would also maintain that air cooling is not a guarantee of less cost because of mass production. If enough water cooled engines are produced than it's unit cost can be lower even if it appears superficially to be more expensive.
I would also maintain that water cooling does not have “many more moving parts” it has a thermostat, a fan, and a water pump.
I would also maintain that the number of parts of motorcycle contains in and of itself is not an indicator of it's reliability or it's cost.
Well there are libraries full of this as I mentioned, that’s for sure. The interplay between engineering, physics, economics, mass production, consumer demand, marketing, and government regulators all play a part.
Dalma is cool and he can take the heat, Hi Dalm gotta for for a spin now!
Last edited by Chumly; 07-31-2004 at 01:52 PM.
And a relay for the fan. and all those extra wires, and a water pump isn't usually a 1 or 2 part assembly, and all the hoses... bikes are already fairly stripped down relative to cars (Gold Wings being an exception) so a handful of extra stuff is significant.
Originally Posted by Chumly
But anyway... I have an air/oil cooled bike, and it's the #1 reason I would get a different bike (as soon as finances allow, and I'm not such a newb). It <em>always</em> runs hot in the city. It's only really happy on the highway. Suzuki Advanced Cooling System my ass!
Addicted to two wheels
Don't forget about those Oil/ air cooled Suzukis. The first batch on GSXR's I used to seel back in 83-84 were oil cooled to save weight. Some still use it to some extent. And then they threw a dry clutch in the Race ready GSXR.....rattle, rattle, rattle.....but that's a whole other story.
You mention "And a relay for the fan. and all those extra wires, and a water pump isn't usually a 1 or 2 part assembly, and all the hoses." Oops forgot the relay! I was reposding to a the point made by Dalma as to "moving parts". How does "and all those extra wires, and a water pump isn't usually a 1 or 2 part assembly, and all the hoses" qualify as moving parts?
Originally Posted by Squint
You mention "so a handful of extra stuff is significant". What perspective do you consider it significant? Cost, weight, reliability? Air cooling doesn't use them? My views as to those four items are posted above
Suzuki Advanced Cooling System my ass!
Last edited by Chumly; 08-01-2004 at 09:58 AM.