[Franzino]

Originally Posted by cooler2442

Just ran my M2C at my first track day, everyone including another M2 owner buddy that attended with me said I need pads/fluids at least before going to the track. My stock M2C brakes compared to his M2 with pads + fluids out braked him during the track day and I felt more confident than he did. He even mentioned it being a passenger in my car.

I presume you have the big 2NH brakes on your M2Comp? So your M2C was braking better and harder (on track) with more confidence with the standard brakes M2C pads then a OG M2 with uprated pads + fluid? Nice to hear...and thanks for the input!

By the way; you know if it is true that your M2comp has better brake cooling then the OG M2...? I never heard this before the stament in this topic. Better engine cooling (for S55) yes...but better/different brake cooling?

[Franzino]

Originally Posted by M Fifty

These are the red retrofit kit. Your local dealership (or aftermarket suppliers) should be able to quote:

https://www.realoem.com/bmw/enUS/sho...diagId=03_5003

True...the red kit is the aftermarket kit; that you can buy for the OG M2, M2 LCI and M2C. But I'm not a fan of the big red calipers (to hard in your face for my taste). So if I go for the bigger M2C kit, then I'm going to buy all the parts separatly to have the grey M2C calipers. This makes the whole BBK kit a bit more expensive (if you include OEM brake pads) then the full red kit (500 euro more in my country). But for me it is worth it, because I realy don't like the red caliper color on my grey car...

[ZM2]

Originally Posted by Franzino

True...the red kit is the aftermarket kit; that you can buy for the OG M2, M2 LCI and M2C. But I'm not a fan of the big red calipers (to hard in your face for my taste). So if I go for the bigger M2C kit, then I'm going to buy all the parts separatly to have the grey M2C calipers. This makes the whole BBK kit a bit more expensive (if you include OEM brake pads) then the full red kit (500 euro more in my country). But for me it is worth it, because I realy don't like the red caliper color on my grey car...

Agreed. Plus that red paint is going to change colors after a few hard track days. Guess I’ll stick with AP.

[Franzino]

Originally Posted by ZM2

Agreed. Plus that red paint is going to change colors after a few hard track days. Guess I’ll stick with AP.

A full AP racing set is a bit more expensive then this 2NH set and in my country it is not legal to fit aftermarket (non-BMW) brakes on your car. You have the risk to get red flagged at the annual car check (MOT) and then you need to remove them before you are allowed to drive on the street (sometimes they notice, sometimes they don't). It can be a real pain to switch every year. My Z4M had AP racing brakes and I was lucky so never needed to remove them...like other friends had to do.

[M2C_PLUS]

Originally Posted by Franzino

The front calipers are the same pad size as the F10 M5 (+ M6)...so everything that fits this will also fit the M2 comp BBK...the rear caliper is specific for the M2 comp BBK.

The rear caliper on the M2C is the same pad shape as the R35 GTR rear caliper. ANY pad that fits the GTR rear caliper will fit the M2C BBK rear too.

[M2C_PLUS]

Originally Posted by Franzino

I presume you have the big 2NH brakes on your M2Comp? So your M2C was braking better and harder (on track) with more confidence with the standard brakes M2C pads then a OG M2 with uprated pads + fluid? Nice to hear...and thanks for the input!

By the way; you know if it is true that your M2comp has better brake cooling then the OG M2...? I never heard this before the stament in this topic. Better engine cooling (for S55) yes...but better/different brake cooling?

My M2C/EVERY M2C has cooling ducts that you can see if you turn the wheel any directions full lock. You will see a large rectangular hole/duct in the wheel liner, front of the wheel.

[Franzino]

Originally Posted by GreatWhiteM2

My M2C/EVERY M2C has cooling ducts that you can see if you turn the wheel any directions full lock. You will see a large rectangular hole/duct in the wheel liner, front of the wheel.

And the OG M2 does not have this?

[Franzino]

Originally Posted by GreatWhiteM2

The rear caliper on the M2C is the same pad shape as the R35 GTR rear caliper. ANY pad that fits the GTR rear caliper will fit the M2C BBK rear too.

How did you find this out?

[cooler2442]

Originally Posted by Franzino

I presume you have the big 2NH brakes on your M2Comp? So your M2C was braking better and harder (on track) with more confidence with the standard brakes M2C pads then a OG M2 with uprated pads + fluid? Nice to hear...and thanks for the input!

By the way; you know if it is true that your M2comp has better brake cooling then the OG M2...? I never heard this before the stament in this topic. Better engine cooling (for S55) yes...but better/different brake cooling?

I have the stock BBK on my M2C which comes standard in America. My friend with the M2 has the stock M2 brakes + track pads/track fluid. He was passenger in my car and said it felt like I was braking better/more confident than him so he was pretty impressed with the stock setup.

I will say now that my pedal feels a bit mushy after the track day so I need to either re-flush the fluid or switch to Castrol SRF. Pads + Rotors seem fine though.

[M2C_PLUS]

Originally Posted by cooler2442

I have the stock BBK on my M2C which comes standard in America. My friend with the M2 has the stock M2 brakes + track pads/track fluid. He was passenger in my car and said it felt like I was braking better/more confident than him so he was pretty impressed with the stock setup.

I will say now that my pedal feels a bit mushy after the track day so I need to either re-flush the fluid or switch to Castrol SRF. Pads + Rotors seem fine though.

I run Castrol SRF with uprated pads in my OEM BBK and never get brake fade.

[Bee Pee]

Originally Posted by Franzino

And the OG M2 does not have this?

No, nor does M3/M4 IIRC.

M2C has brake ducts either side of the lower centre grille which take cooler air into the wheel well area - still needs ducting to caliper/disc to be fully effective but its much easier to do on M2C than OG M2...

[Franzino]

Originally Posted by Bee Pee

No, nor does M3/M4 IIRC.

M2C has brake ducts either side of the lower centre grille which take cooler air into the wheel well area - still needs ducting to caliper/disc to be fully effective but its much easier to do on M2C than OG M2...

Thanks for the info....did not know this about the M2 C...

[Bee Pee]

Originally Posted by GreatWhiteM2

I run Castrol SRF with uprated pads in my OEM BBK and never get brake fade.

+1 - despite my best efforts - I tried to make GWM2's brake fade but to no avail - some seriously good anchors.

Also, did a couple of high speed stops with finger tips barely touching the wheel - car pulled up straight, true and in very short distance - hazard lights set off but not enough to trigger the airbags

[Proctor750]

I have a set of XP12's and XP10s (rear pad shape is generic - same as nissan GTR) since no PFC's are available with front shape yet.

Also have rear ti shims and fronts on the way and installed the little porsche brake scoops onto the control arms.

Something to consider with these giant truck brakes - you must put temperature into them gradually (warm them up) before giving it threshold treatment. They are large enough to where you can generate hot spots and crack rotors if you don't take your time getting them up to temp.

Had a long call with a brembo rep about the 2NH calipers.

[M2C_PLUS]

Originally Posted by Bee Pee

+1 - despite my best efforts - I tried to make GWM2's brake fade but to no avail - some seriously good anchors.

Also, did a couple of high speed stops with finger tips barely touching the wheel - car pulled up straight, true and in very short distance - hazard lights set off but not enough to trigger the airbags

:

Our breakfast would have gone a different route if the airbags had gone off :

[Franzino]

Originally Posted by Proctor750

I have a set of XP12's and XP10s (rear pad shape is generic - same as nissan GTR) since no PFC's are available with front shape yet.

Also have rear ti shims and fronts on the way and installed the little porsche brake scoops onto the control arms.

Something to consider with these giant truck brakes - you must put temperature into them gradually (warm them up) before giving it threshold treatment. They are large enough to where you can generate hot spots and crack rotors if you don't take your time getting them up to temp.

Had a long call with a brembo rep about the 2NH calipers.

What was his opinion about the 2NH set...and did you talk about the difference between the normal blue set and the 2NH set?

[Proctor750]

Originally Posted by Franzino

What was his opinion about the 2NH set...and did you talk about the difference between the normal blue set and the 2NH set?

It's been a few weeks now but IIRC he mentioned the 2NH which is obviously an OEM spec brembo caliper is similar to the GT family of calipers with a few exceptions like closed bridge (have to take caliper off to change pads). He also suggested some of the fluids etc that work well. He specifically mentioned taking time to get everything warmed up. I do this anyway since I get on the brakes to help warm up the tires.
Can't remember what else we talked about but it was a good hour long chat - should have taken notes.

Either way - once my 19" EC7's and RE71R's come in I will thoroughly test the brakes at NCM. I am very hard on brakes so it should be a good test especially turns 1 and 10.

[Franzino]

Originally Posted by Proctor750

It's been a few weeks now but IIRC he mentioned the 2NH which is obviously an OEM spec brembo caliper is similar to the GT family of calipers with a few exceptions like closed bridge (have to take caliper off to change pads)

The closed bridge is a downside and I hope that changing the front pads is not that time consuming

[Proctor750]

Originally Posted by Franzino

The closed bridge is a downside and I hope that changing the front pads is not that time consuming

I would rate it at 1.5 beers.

If you had to change back to back at the track it would suck because of how hot everything is.

[MINI135i]

As mentioned in the thread, glad BMW made some effort at least to get a little more cooling to the brakes on the M2C. Real world significance probably moderate to minimal, but it does open up more options to route dedicated cooling without cutting and hacking.

M2C brake duct for reference:

[Franzino]

Originally Posted by MINI135i

As mentioned in the thread, glad BMW made some effort at least to get a little more cooling to the brakes on the M2C. Real world significance probably moderate to minimal, but it does open up more options to route dedicated cooling without cutting and hacking.

M2C brake duct for reference:

Thanks...for the pic...

[tux2005]

It looks like on RealOEM they also show the ducting and how it connects, it comes from the corners of the center grill under the kidneys:
https://www.realoem.com/bmw/enUS/sho...diagId=51_A018

Interestingly they also show it on the pre-LCI versions but don't have a part number (and I don't think it would fit either:
https://www.realoem.com/bmw/enUS/sho...diagId=51_8574