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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > E90 LCI M-sport... Deleting brake air duct for all oil cooler duct?



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      10-29-2012, 10:41 AM   #1
Bagelfast
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E90 LCI M-sport... Deleting brake air duct for all oil cooler duct?

So i was looking at the e90 lci M-sport passenger side air duct.

It is a one piece air duct, that within it seperates into 2 paths.
Top path (half) for the oil cooler, and the lower path (half) for the brakes.

Here in the pic, you can see the air duct for the brakes is larger and more biased towards where the air is headed.
I was thinking of blocking the path for the brakes, and making this a one path air duct for the oil cooler.



Gonna size a piece of plastic using oem push pin/clips to mount and angel it up towards the oil cooler, so the air has a nice smooth transistion biased upwards, while blocking the air going towards the brake path


The path to the brakes as we all know isnt a direct path and unless the wheel is turned outwards, never gets to see any cooling with this duct. Alot with it being far away from the direction of the brakes, its in the air if these ducts really even do work? Anyone have any input?

So thats basically my question, how important are these brake coolers? Do they really help? esp in DD? where i do 90% of my driving.
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      06-08-2016, 05:28 PM   #2
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Quote:
Originally Posted by Bagelfast View Post
So i was looking at the e90 lci M-sport passenger side air duct.

It is a one piece air duct, that within it seperates into 2 paths.
Top path (half) for the oil cooler, and the lower path (half) for the brakes.

Here in the pic, you can see the air duct for the brakes is larger and more biased towards where the air is headed.
I was thinking of blocking the path for the brakes, and making this a one path air duct for the oil cooler.



Gonna size a piece of plastic using oem push pin/clips to mount and angel it up towards the oil cooler, so the air has a nice smooth transistion biased upwards, while blocking the air going towards the brake path


The path to the brakes as we all know isnt a direct path and unless the wheel is turned outwards, never gets to see any cooling with this duct. Alot with it being far away from the direction of the brakes, its in the air if these ducts really even do work? Anyone have any input?

So thats basically my question, how important are these brake coolers? Do they really help? esp in DD? where i do 90% of my driving.

I know this is super old but I found it doing some searching. For anyone else, the stock brake ducts do work. I built an oil cooler for the driver side that covered the rectangular opening for the brake duct into the wheel well. The first time at the track I burned through half of an HT-10 pad and seized my caliper piston on that side due to overheating. The passenger side, with the stock oil cooler and brake ducting, was fine. I have since built brake ducts that dump air into the center of the disk to avoid this. Just wanted to let you know the stock ducts work even if it doesn’t look like they do much!
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      06-11-2016, 11:48 PM   #3
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Quote:
Originally Posted by Bagelfast View Post
I was thinking of blocking the path for the brakes, and making this a one path air duct for the oil cooler.
The path to the brakes as we all know isnt a direct path and unless the wheel is turned outwards, never gets to see any cooling with this duct. Alot with it being far away from the direction of the brakes, its in the air if these ducts really even do work? Anyone have any input?
So thats basically my question, how important are these brake coolers? Do they really help? esp in DD? where i do 90% of my driving.
If the duct performance is insignificant they would not be there at all to begin with. Also, if you want better cooling either upgrade to aluminum coolant radiator or install the aux coolant radiator from BMW PKK.
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