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M2 Technical Topics > Suspension | Brakes | Chassis > Brake Difference M2 / M240i

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      11-22-2019, 11:17 AM   #1
BallHog5873
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Brake Difference M2 / M240i

They both have 4 piston in front and 2 in the back right? M2 has perforated rotors, which is basically cosmetic on modern brakes from what I understand.
What are major differences?
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      11-22-2019, 11:56 AM   #2
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Quote:
Originally Posted by BallHog5873 View Post
They both have 4 piston in front and 2 in the back right? M2 has perforated rotors, which is basically cosmetic on modern brakes from what I understand.
What are major differences?
Pads and discs.

M cars have more aggressive M pads and the M cars have "M compound discs" (as in in two part discs).

Basically the discs are a bit bigger than the non - M car's discs and have an aluminium center hat like racing brake discs. This hat is pinned to the cast iron rotor to allow for differential heat expansion of the 2 materials. If you track the car you will hear tinging when you park the car and let it cool down.

https://www.bmwblog.com/2014/04/13/n...-brake-system/

As far as I know the calipers are the same, a common upgrade it to get the M pads. Discs probably cant be swapped unless you do the M knuckles too.
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      11-25-2019, 01:19 PM   #3
BallHog5873
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Quote:
Originally Posted by Megator View Post
Pads and discs.

M cars have more aggressive M pads and the M cars have "M compound discs" (as in in two part discs).

Basically the discs are a bit bigger than the non - M car's discs and have an aluminium center hat like racing brake discs. This hat is pinned to the cast iron rotor to allow for differential heat expansion of the 2 materials. If you track the car you will hear tinging when you park the car and let it cool down.

https://www.bmwblog.com/2014/04/13/n...-brake-system/

As far as I know the calipers are the same, a common upgrade it to get the M pads. Discs probably cant be swapped unless you do the M knuckles too.
Thanks!
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