Auxillary Fan Operation - Page 4

**alexk** · 15-03-2014, 06:25 PM

Quote:

Originally Posted by alexk

shimmy and all, do we have a photo of a non-AC CSL to see how the radiator looks like ?

What is interesting is that the heat-generating monster M5 F10 has no front radiator fan for the AC and only a rear electric radiator.
http://mfans2.com/parts/catalog/F10/...rts/#2283923_1

Here another information of the upgraded fan of the Z4 35is and 1M.
http://www.e90post.com/forums/showthread.php?t=797466

I think I will remove completely the fan clutch and the AC fan from my car.
I start to think that the AC fan and case is reducing the air flow.
Otherwise I cannot explain why BMW ditched it from the M5 F10 which is the most challenging car they ever built in terms of heat management.

I found a CSL without AC and in front of the radiator there is nothing blocking the air (like in my M5).
I will get back later with some pics of my DIY.

**alexk** · 16-03-2014, 09:26 PM

Quote:

Originally Posted by alexk

I found a CSL without AC and in front of the radiator there is nothing blocking the air (like in my M5).
I will get back later with some pics of my DIY.

So here what I did to bin the AC fan -> http://www.cslregister.com/forum/sho...392#post165392

terraphantm · 26-03-2014, 02:44 AM

Quote:

Originally Posted by alexk

shimmy and all, do we have a photo of a non-AC CSL to see how the radiator looks like ?

What is interesting is that the heat-generating monster M5 F10 has no front radiator fan for the AC and only a rear electric radiator.
http://mfans2.com/parts/catalog/F10/...rts/#2283923_1

Here another information of the upgraded fan of the Z4 35is and 1M.
http://www.e90post.com/forums/showthread.php?t=797466

I think I will remove completely the fan clutch and the AC fan from my car.
I start to think that the AC fan and case is reducing the air flow.
Otherwise I cannot explain why BMW ditched it from the M5 F10 which is the most challenging car they ever built in terms of heat management.

BMW ditched the front fan in almost all of their vehicles. They have since opted to simply use more powerful fans. That electric fan in that M5 is a 1000W unit -- the AC fan in the M3/CSL is paltry 200W in comparison. The Z4M (S54) also ditches the AC fan in favor of a 600W puller fan in front of the radiator. Also note that the E46 non-M also has an electric-only fan, though only 400W

Rather than delete both fans, I think it would be best to put an electric fan in the front. I think the non-M fan would be sufficient for any M3 that isn't driven in the desert.

uncle benz · 26-03-2014, 08:35 AM

Nerdy fact of the day... If your viscous fan coupling is weak or failed completely, the car will use the a/c fan to reduce temperature if needed.

**shimmy** · 26-03-2014, 08:49 AM

Quote:

Originally Posted by uncle benz

Nerdy fact of the day... If your viscous fan coupling is weak or failed completely, the car will use the a/c fan to reduce temperature if needed.

Looking at the controls data AlexK posted on the electric fan, we can all see that Gareth......you'll have to work harder here to get a nerd prize

Neil M · 26-03-2014, 11:05 AM

I'm no expert at things mechanical but looking a the pics posted, it might make more sense to remove the radiator shroud than the fan, in terms of increasing air flow.
The surface area of the fan appears minimal compared to that of the shroud.

**alexk** · 26-03-2014, 12:48 PM

Neil the electric fan cannot sit in air...
The fan shroud is used to keep it into place.

Neil M · 26-03-2014, 12:50 PM

Ha, ha, I said I was no expert!

**Mike R** · 26-03-2014, 06:47 PM

Neil was going to use his patented sky hooks

.

mattCSLnut · 26-03-2014, 10:32 PM

Quote:

Originally Posted by Mike R

Neil was going to use his patented sky hooks

.

... or nail it in place with a glass hammer

26-03-2014, 11:05 AM	#36
Neil M Driving it like I nicked it Join Date: Jan 2012 Location: Manchester Posts: 2,340 Casino cash: $19143	I'm no expert at things mechanical but looking a the pics posted, it might make more sense to remove the radiator shroud than the fan, in terms of increasing air flow. The surface area of the fan appears minimal compared to that of the shroud. __________________ “With the CSL, BMW have achieved The Ultimate Driving Machine” SG CSL '051'

26-03-2014, 12:48 PM	#37
alexk Driving it like I nicked it Join Date: Mar 2009 Posts: 2,785 Casino cash: $29948	Neil the electric fan cannot sit in air... The fan shroud is used to keep it into place. __________________ www.clubcsl.com - I am a BMW Motorsport fan ! My youtube channel is here

26-03-2014, 12:50 PM	#38
Neil M Driving it like I nicked it Join Date: Jan 2012 Location: Manchester Posts: 2,340 Casino cash: $19143	Ha, ha, I said I was no expert! __________________ “With the CSL, BMW have achieved The Ultimate Driving Machine” SG CSL '051'

26-03-2014, 06:47 PM	#39
Mike R S6, Sport On, Traction Off Join Date: Dec 2010 Location: Norwich Posts: 1,582 Casino cash: $17558	Neil was going to use his patented sky hooks . __________________ Mike R Sarcasm is just a free service I provide. Nordschleife, there's only two barriers to worry about - the ones on the left and the ones on the right . CSL number 044

26-03-2014, 08:35 AM	#34
uncle benz S4 - Getting the hang of it Join Date: Nov 2009 Location: West Sussex Posts: 155 Casino cash: $5680	Nerdy fact of the day... If your viscous fan coupling is weak or failed completely, the car will use the a/c fan to reduce temperature if needed.