Hi I was reading some articles and came across this. Do you know what it does for the car? Sepcifically, I was looking at Mugen's website and they have this part for sale. Hence I would like to know its funciton.

At the mean time, could you also explain the use of the radiator to me? I have a vague idea what it does, just want to make sure once and for all.

Thanks

regards

 

http://autorepair.about.com/autos/autorepair/gi/dyn amic/offsite.htm?site=http%3A%2F%2Fwww.familycar.com%2F CoolingSystem.htm://http://autorepair.about.com/autos/a...olingSystem.htm://http://autorepair.about.com/autos/a...olingSystem.htm

Or a little more detail
http://members.home.net/ronhovestad/radinf...fo.htm#overview



[This message has been edited by cdelena (edited November 08, 2000).]

 

The radiator is the thing that contains coolant that circulates through the engine. Coolant, as it moves through the various chasms inside the engine block, heats up and is circulated back into the radiator where it is cooled by the air that blows across the fins of the radiator. So the coolant is removing heat from the engine. And we all know that heat is the enemy, sorta...most of the time, anyway, cuz....ummm, sometimes heat is gooood...

It's the job of the thermostat to open and close the flow of coolant into the engine block from the radiator. It's a device that sits at the engine-side of the radiator hose. It opens and closes according to the temperature that senses and allows coolant to flow into or out of the engine (depending on the application)

Having the Mugen thermostat, while I don't know the specifics of the temperature that makes it open/close, acts in such a way that it modifies the flow of the coolant to increase the cooling ability of the coolant. Removing as much heat as possible is a good thing and I understand the Mugen thermostat works in such a way to open and close at more effective points than the stock thermostat.

I will be putting the Mugen thermostat in my S2000 for next season. My bud Nick has the Mugen in his and he said he notices a difference. But ordinary street driving, I can't imagine that you would feel any kind of difference. At the track, under extreme conditions where things get seriously hot, yes, get the Mugen or other high perf thermostat...


HTH!

 

The thermostat is designed to be closed when cold and open when the coolant heats up. It's purpose is to restrict cooling at engine startup so that the engine heats up to operating temperature quickly. It then opens and the coolant keeps the engine from getting hotter.

Basically, it is designed to decrease engine wear in the first 5 or so minutes of driving.

 

Very impressive Greg. Have you ever written manuals before? You were very clear and exhibited fairly good grammmar for a forum post.

I know I make tons of errors, but figure people know that I am just cranking these out.

By the way, most thermostats open at 180 degrees with some "high performance" ones opening at 160 degrees. I believe these are the right numbers.

[This message has been edited by song (edited November 08, 2000).]

 

the thermostate also activate the fans in fron of the radiator. It activated depend on temp wise.

 

Nice links Chris.
Thanks!
Barry

 

The stock thermostat fully opens at 195 F while the Mugen fully opens at 180 F.

Acording to Mugen, under high-rpm conditions temperatures can spike and the car will loose power not because of the temp but because of the computer reacting to it (Various members here have confirm this on the dyno).

The Mugen unit allows the car to heat up fast during warm up while maintaining lower temps.

At almost $70 for the Mugen it's pretty expensive as thermostats go. A thermostat shouldn't cost more than $20.

Funcar once mentioned that he found a part number for a Stant thermostat (good quality and cheap) that will fit the S2000 and has a operating temp of 180 F.

 

Ok now if someone wants to take on the task of explaining how the AC works. How the freon is forced under pressure by the compressor to the evaporator, expands into a gas in the evaporator where is absorbs the heat out of the cabin, creating cool air, then passes through the dryer to the condensor where the heat is transferred by the condensor coils and the gas is condensed back into a liquid and on to the compresor again. Or something like that.

 

Compressing a gas causes it to heat up and allowing a gas to expand will cause to to cool. Freon is compressed so it heats up above the ambient (outside) temperature. The compressed gas, which usaully changes to liquid under compression, cools off since it is hotter than the air around it. This cooling process can be aided by cooling fins and a fan. The freon is then pumped inside where it is allowed to expand and thus gets cold. Since heat was removed in its compressed state, it is now cooler than before and can used to cool the inside air.

The gas coming out of an aerosal can is cool for the same reason.