track temperature issues

[shimmy]

Just remembered, from AlexK

shimmy, I could be wrong but I think the electric fan is also installed on the non-AC cars.

The fan is used to provide additional cooling to the engine. It's not used just for the AC.

Here are the maps that show how the fan is operated.

Temperature (°C)|Operation/speed (%)
|49°C|0%
|50°C|30%
|70°C|40%
|80°C|65%
|85°C|83%
|90°C|100%

The second map, that changes the voltage supply depending on the speed.
Above 140km/h it's deactivated.

speed (km/h)|Voltage (index)
|0 km/h|1
|50 km/h|1
|100 km/h|1
|120 km/h|0.5
|140 km/h|0
|200 km/h|0

[khooni]

I could have sworn someone said that non AC cars didn't have the AC fan....

anyway wks for the parameters Shimmy. I didn't know it would turn off at 140km/h.........

[shimmy]

I could have sworn someone said that non AC cars didn't have the AC fan....

anyway wks for the parameters Shimmy. I didn't know it would turn off at 140km/h.........

I'd be surprised if it's there too on non AC cars as I'm sure e92 m3 was first to have electric fan as standard

Either way it turns off at 87.5mph

[alexk]

Non AC cars do not have a fan.
The fan is restricting the airflow, that's why I removed mine.

[Mike RT4]

Non AC cars do not have a fan.
The fan is restricting the airflow, that's why I removed mine.

Alex,
Is it a significant weight saving as well ?

[billyboysm3]

Have you got a/c and a/c rad?

No ripped it out.

[billyboysm3]

Want to keep it OEM looking as possible really.

Im at Snetterton Monday so will see how it performs then.

[khooni]

I'd be surprised if it's there too on non AC cars as I'm sure e92 m3 was first to have electric fan as standard

Either way it turns off at 87.5mph

hmm. simpsons told me to keep it because when turned on it would help with cooling. didn't know it would switch off after 87.5mph but during a slow corner it would drop below 87.5mph does it turn back on then? does the fan stay on until speed is high for a while or does the fan stay off until speed is low for a while? this makes a difference on track obviously.

[alexk]

Alex,
Is it a significant weight saving as well ?

Yeap, check my thread !

hmm. simpsons told me to keep it because when turned on it would help with cooling. didn't know it would switch off after 87.5mph but during a slow corner it would drop below 87.5mph does it turn back on then? does the fan stay on until speed is high for a while or does the fan stay off until speed is low for a while? this makes a difference on track obviously.

Well I suppose if you race in a hot day and you are using the AC, the fan will be needed in the slow corners.
But the fan does restrict air flow, check here -> http://www.cslregister.com/forum/sho...t=10735&page=4