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      09-07-2018, 09:31 AM   #1
MadViper
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M2C brake fade at the track

Hello, coming from a 2017 M2 (sold) and a 2018 M2 (sold) yesterday was my first time with my M2C on the track, I have the big brake kit option 2NH and the brakes were horrible, spongy as hell which didn't allow me to push the car to its limits in some straights. I checked the brake fluids and the levels were OK. Please have in mind that on my 2017 and 2018 M2 i could do 80 laps a day and ZERO brake fade, yes the caliper turned green but the brake feel was perfect. I need to solve this problem, I know that getting steel brake lines can solve the problem but want to know your opinion. Probably getting a different brake fluid.
Ohhhh, yes, you can feel the +150 LB at the first corner...
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      09-07-2018, 09:35 AM   #2
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Your M2C is heavier and has more power, and depending upon your driving, you are asking more of the brakes compared to the M2. Stock fluid is not really great at dealing with heat and will boil quickly leading to pressure loss and a soft pedal. You need to run a RBF like Castrol SRF or Motul RBF 660.
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      09-07-2018, 09:46 AM   #3
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Not surprising with stock street pads.Put a proper set of track pads in and then try it on the track.
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      09-07-2018, 09:47 AM   #4
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Typically the big 3 of pads is dust, performance, and noise. Pick two for emphasis, lol.
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      09-07-2018, 10:25 AM   #5
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Can't say anything about feeling the extra weight since I haven't driven the car yet but doing 80 laps on blue brakes with stock pads and fluid without any fade doesn't sound convincing at all. Maybe you were just cruising around the track for those 80 laps... In my first track day with my M4 at Thunderhill East (3-mile), my brakes with stock pads and fluid couldn't even last 3-4 laps without fading. Again on my very first track day with the M4, I experienced my brake pedal fully going to the floor as if I got no brakes. Stock pads and fluid aren't meant for track days (especially the pads!!!). Just because the car has bigger brakes doesn't mean you can get away with stock pads and fluid. Sorry but if you have this much track experience you should know better.
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      09-07-2018, 10:33 AM   #6
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Quote:
Originally Posted by MadViper View Post
Hello, coming from a 2017 M2 (sold) and a 2018 M2 (sold) yesterday was my first time with my M2C on the track, I have the big brake kit option 2NH and the brakes were horrible, spongy as hell which didn't allow me to push the car to its limits in some straights. I checked the brake fluids and the levels were OK. Please have in mind that on my 2017 and 2018 M2 i could do 80 laps a day and ZERO brake fade, yes the caliper turned green but the brake feel was perfect. I need to solve this problem, I know that getting steel brake lines can solve the problem but want to know your opinion. Probably getting a different brake fluid.
Ohhhh, yes, you can feel the +150 LB at the first corner...
Thanks
What track was this on?
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      09-07-2018, 10:40 AM   #7
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Quote:
Originally Posted by cntzl View Post
Sorry but if you have this much track experience you should know better.
Totally agree!!
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      09-07-2018, 11:16 AM   #8
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Wait, how come you didn't also buy a MY16 m2? Will you buy a 2020 m2?
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      09-07-2018, 11:26 AM   #9
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Sounds like a troll
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      09-07-2018, 12:17 PM   #10
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Quote:
Originally Posted by chris719 View Post
Sounds like a troll
Agreed
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      09-07-2018, 12:30 PM   #11
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Quote:
Originally Posted by MadViper View Post
Hello, coming from a 2017 M2 (sold) and a 2018 M2 (sold) yesterday was my first time with my M2C on the track, I have the big brake kit option 2NH and the brakes were horrible, spongy as hell which didn't allow me to push the car to its limits in some straights. I checked the brake fluids and the levels were OK. Please have in mind that on my 2017 and 2018 M2 i could do 80 laps a day and ZERO brake fade, yes the caliper turned green but the brake feel was perfect. I need to solve this problem, I know that getting steel brake lines can solve the problem but want to know your opinion. Probably getting a different brake fluid.
Ohhhh, yes, you can feel the +150 LB at the first corner...
Thanks
I can believe the pedal going soft its soft to begin with. I posted it in my initial impressions of the car. My OG 17 had a much firmer pedal, tracked it with SRF and track pads and was ok, (not wonderful). TheM2C should have better fade resistance by virtue of the bigger rotors and calipers?? Try better fluid and pads after that it comes down to airflow/cooling.My GT4 has 380mm the M2C=400+6piston F/4R should be sufficient?? carl
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      09-07-2018, 01:04 PM   #12
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Quote:
Originally Posted by carl44 View Post
I can believe the pedal going soft its soft to begin with. I posted it in my initial impressions of the car. My OG 17 had a much firmer pedal, tracked it with SRF and track pads and was ok, (not wonderful). TheM2C should have better fade resistance by virtue of the bigger rotors and calipers?? Try better fluid and pads after that it comes down to airflow/cooling.My GT4 has 380mm the M2C=400+6piston F/4R should be sufficient?? carl
I could see the pedal feel being different for sure. The same master cylinder and brake booster is used for all of the brakes, but the calipers get much larger.

Hard to compare feel with different pads though. The M2C is using F10 M5 front pads I think. If the OP used stock pads then his entire post is worthless.
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      09-07-2018, 01:10 PM   #13
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Quote:
Originally Posted by chris719 View Post
I could see the pedal feel being different for sure. The same master cylinder and brake booster is used for all of the brakes, but the calipers get much larger.

Hard to compare feel with different pads though. The M2C is using F10 M5 front pads I think. If the OP used stock pads then his entire post is worthless.
I believe all the cars at Ascari had stock pads. I don't remember anyone saying there was fade?
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      09-07-2018, 02:14 PM   #14
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Wait, maybe a better question is why you are buying a m2 every year?
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      09-07-2018, 02:21 PM   #15
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Eighty Laps!
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      09-07-2018, 03:10 PM   #16
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that is a lot of laps though lol...but i don't know which track.

anyways ill take this with a dash of salt
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      09-07-2018, 03:38 PM   #17
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Even though what you are saying sounds logical and 90% of the brake track threads on this forum say the same thing you said, change the pads, change the fluid… The intention of original post is to see if anyone has experienced the same thing, I got my car a few weeks ago and I know that not many people has taken their M2C to the track. Believe or not OG M2 with everything OEM did not fade at all, as I mentioned before the only problem was the calipers turning green that did not affect the cars ability to brake. I do plan to change the pads and fluid after what I experienced yesterday.
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      09-07-2018, 03:40 PM   #18
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2.3 kilometers is the track length

Last edited by MadViper; 05-21-2019 at 07:27 PM..
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      09-07-2018, 03:43 PM   #19
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8 sessions of 10 laps, each lap is around 1:30 to 1:40 depending on the car. Total cars at the track:7
From 9AM to 5PM, all you can drive...
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      09-07-2018, 03:52 PM   #20
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Quote:
Originally Posted by MadViper View Post
https://es.wikipedia.org/wiki/Aut%C3...de_Panam%C3%A1
The page is in Spanish, use your web translator to understand it. 2.3 kilometers is the track length
cool! jungle track!

like others said, some different brake fluid and pads should sort that out (hopefully new lines aren't required). still produced as a street car so you have to expect that.
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      09-07-2018, 04:07 PM   #21
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Quote:
Originally Posted by MadViper View Post
Even though what you are saying sounds logical and 90% of the brake track threads on this forum say the same thing you said, change the pads, change the fluid… The intention of original post is to see if anyone has experienced the same thing, I got my car a few weeks ago and I know that not many people has taken their M2C to the track. Believe or not OG M2 with everything OEM did not fade at all, as I mentioned before the only problem was the calipers turning green that did not affect the cars ability to brake. I do plan to change the pads and fluid after what I experienced yesterday.
The stock pads are not the same as the OG brakes. They could be worse for track use for all we know. I think the comparison isn't really fair given that they are street pads.
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      09-07-2018, 04:57 PM   #22
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I just finished 3 days at the ring with my M2C, I did a countless number of laps and a few with Misha on board as well as some quick ring personalities. I wasn't pushing 10/10's but the kind of fade that the OP is describing never occurred for me. Either this is a troll or there is something wrong with his brakes.
I didn't feel the brake feel was "Terrible" at all. I think it's linear and has great stopping force. the brakes are not a complaint i have with the vehicle.
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