[Poochie]

Originally Posted by cntzl

This is probably the most annoying thing about the stock brakes on my M4. They turned into black after couple track days. However, I think BMW did it on purpose and here's why. BMW free maintenance covers for pads and rotors for MY2015 and MY2016 cars (they changed this starting with MY2017). I think they used such a bad heat-resistant paint on stock calipers so that they could easily identify tracked cars and deny free pad/rotor replacement. Now that pads/rotors are not part of the free maintenance, I bet these gray calipers won't change color. If they do, I'll be pretty pissed once again tho

Excuse my ignorance but the caliper's paint melts/fade on the track?

[AndrewC1989]

Originally Posted by Poochie

Excuse my ignorance but the caliper's paint melts/fade on the track?

http://f87.bimmerpost.com/forums/sho....php?t=1396175

[Poochie]

Originally Posted by andrewc89

http://f87.bimmerpost.com/forums/sho....php?t=1396175

SMHing, BMW, "The Ultimate Driving Machine" can appear so vain at times..

[kvnchu]

Originally Posted by andrewc89

I know for a fact our current 4 piston fronts can be moved to the rear without any modifications needed, so it's just a question of if the new 6 piston calipers and rotors from the M2C will be plug and play on our cars, which I believe they should be. The M2/M3/M4 all share the same brakes and It would seem illogical from a financial standpoint for bmw to have completely redesigned them from the ground up just for the M2C. My guess is they just took the M5 rotors and calipers and modified them to fit our cars. But you never know, I guess we'll have to wait and see.

hey Andrew, i knew i read this somewhere and was looking for the past hour for this particular post.

theoretically i would be able to run an ap bbk and move my 4pot to the rear of my m2c? thanks.

not in US so 6 pot isnt standard here. thanks.

btw where did you get the info that this would work ok for the brake bias. appreciated!

[AndrewC1989]

Originally Posted by kvnchu

theoretically i would be able to run an ap bbk and move my 4pot to the rear of my m2c?

The dimensions of the OG M2 (Blue Brakes) front rotor and M2C (Silver Brakes) rear rotor seem to be identical (380x30mm):

https://f87.bimmerpost.com/forums/sh....php?t=1497066

So that is why I assumed the swap would theoretically work if one were to move all of the front components to the rear. I may have jumped the gun stating it as fact. You'd have to double check this.

Brake bias would depend on a lot of factors related to what kind of bbk you go with up front. I honestly have no idea how well or poorly the stock brakes and aftermarket bbk would work in tandem. You'd have to contact the manufacturer of your bbk and inquire with them if it's possible/safe.

[kvnchu]

Originally Posted by andrewc89

The dimensions of the OG M2 (Blue Brakes) front rotor and M2C (Silver Brakes) rear rotor seem to be identical (380x30mm):

https://f87.bimmerpost.com/forums/sh....php?t=1497066

So that is why I assumed the swap would theoretically work if moved all of the front components to the rear. I may have jumped the gun stating it as fact. You'd have to double check this.

Brake bias would depend on a lot of factors related to what kind of bbk you go with up front. I honestly have no idea how well or poorly the stock brakes and aftermarket bbk would work in tandem. You'd have to contact the manufacturer of your bbk and inquire with them if it's possible/safe.

thats honestly what i was thinking too, though honestly the rears dont see much action in F/R car, i should be okay with the 2pot rear with a AP front bbk.

Would prefer obviously to have the 4pot on the rear if it is compatible. Will find out. and let everyone know.

Will also need to find out if the og blue brake booster and the new 2nh brake booster is the same p/n.

[Bee Pee]

Originally Posted by andrewc89

I know for a fact our current 4 piston fronts can be moved to the rear without any modifications needed, so it's just a question of if the new 6 piston calipers and rotors from the M2C will be plug and play on our cars, which I believe they should be. The M2/M3/M4 all share the same brakes and It would seem illogical from a financial standpoint for bmw to have completely redesigned them from the ground up just for the M2C. My guess is they just took the M5 rotors and calipers and modified them to fit our cars. But you never know, I guess we'll have to wait and see.

Andrew

Where are the facts about front 4pots swap to the rear calipers ?

BP

[kvnchu]

Originally Posted by Bee Pee

Andrew

Where are the facts about front 4pots swap to the rear calipers ?

BP

we were just talking about this now. Need more data. will call up bmw to get the part number for the standard 4pot vs the 2nh 4pot and check.

[chris719]

Originally Posted by kvnchu

we were just talking about this now. Need more data. will call up bmw to get the part number for the standard 4pot vs the 2nh 4pot and check.

It looks visually different to me, the shape I mean. Could be wrong.

Plus, it'd be weird to have gray calipers up front and blue in the back.

[AndrewC1989]

Originally Posted by chris719

It looks visually different to me, the shape I mean. Could be wrong.

The 4 pot calipers look and weight different amounts (between the two cars) but the dimensions and weight of their respective rotors appears to be identical.

Originally Posted by chris719

It'd be weird to have gray calipers up front and blue in the back.

Presumably you'd repaint them to match each other.

[chris719]

Originally Posted by andrewc89

The 4 pot calipers look and weight different amounts (between the two cars) but the dimensions and weight of their respective rotors appears to be identical.



Presumably you'd repaint them to match each other.

I suppose. Seems easier to just get an aftermarket BBK where you don't have to repaint your calipers and worry about brake bias being wrong. I don't think the front 2NH parts come cheaply.

[kvnchu]

Originally Posted by andrewc89

The 4 pot calipers look and weight different amounts (between the two cars) but the dimensions and weight of their respective rotors appears to be identical.


Presumably you'd repaint them to match each other.

If it is different it probably wont be plug and play then.

Will keep checking piston size etc. Fingers crossed.

It is for track duty, would probably just let the heat take care of the color for me.

[AndrewC1989]

Originally Posted by chris719

I suppose. Seems easier to just get an aftermarket BBK where you don't have to repaint your calipers and worry about brake bias being wrong. I don't think the front 2NH parts come cheaply.

This is an old thread from last April that was randomly resurrected today. A lot's changed since then and this idea has been dead in the water for me for quite some time now. I agree, It doesn't really seem like it's worth doing even if it could potentially work.

[kvnchu]

Originally Posted by andrewc89

This is an old thread from last April that was randomly resurrected today. A lot's changed since then and this idea has been dead in the water for me for quite some time now. I agree, It doesn't really seem like it's worth doing even if it could potentially work.

Im starting to feel this as well, if i dont get an answer within the next week i'll just go to ap bbk front and stay with the 2 pot rear instead of swapping the 4 to the back

[Robin_NL]

Tutanchamon says the blue brakes are more than fine.

Cheers
Robin

[kvnchu]

Checked with Jeff from AP racing. He does not think it would be possible.

Thanks all!