06-15-2022, 10:21 AM | #23 | |
Private
35
Rep 57
Posts |
Quote:
I have 54k km on mine, and maybe 2/3 times per week I need to do 2/3 hard braking to "clear" squealing |
|
Appreciate
0
|
06-22-2022, 09:56 AM | #25 |
Lieutenant
509
Rep 533
Posts |
|
Appreciate
1
No_curebimmer645.00 |
06-22-2022, 10:26 AM | #26 |
Lieutenant
314
Rep 438
Posts |
@10SecGG
I'm pretty aggressive on them , But only once I warm them up . Same with the engine …I am very polite to her until she's warmed up. |
Appreciate
0
|
06-22-2022, 10:51 AM | #28 |
Lieutenant
509
Rep 533
Posts |
|
Appreciate
0
|
06-22-2022, 10:54 AM | #29 |
Lieutenant
509
Rep 533
Posts |
|
Appreciate
0
|
06-22-2022, 02:58 PM | #30 | |
Captain
976
Rep 843
Posts |
Quote:
When people ask I just say "it's a performance car feature!" |
|
Appreciate
1
Fred Conoway365.00 |
06-22-2022, 03:15 PM | #31 |
Lieutenant
509
Rep 533
Posts |
|
Appreciate
0
|
07-08-2022, 09:52 AM | #32 | |
BimmerPost Supporting Vendor
1029
Rep 842
Posts |
Quote:
As you drive around with your brakes cold, the friction generated between the pads and discs gradually scrubs off the pad transfer layer on the disc, taking them back down to bare iron. When that occurs, the noises begin again. Pad and disc bedding is not a one and done affair. A pad transfer layer is something that must be maintained as needed. People who track their cars regularly get their brakes hot enough to consistently have the pad material stick to their discs. Below are a couple videos we produced on pad bedding and swapping between street and track pads. If you understand the concept and mechanisms described in these videos, you'll know everything you need to know to bed any pad or disc in the future. As for specific pads, we suggest the Ferodo DS2500. It is the best sport pad we're aware of, and some people even use it for light track duty. They are low noise, have great feel, and a very high max operating temp/fade resistance. They are perfect for daily driving, autoX, canyon runs, etc. They aren't cheap, but they're about as close to a unicorn-spec, 'do everything' pad as you'll find. Here are the shapes for your car: Ferodo DS2500 for Front M2 Comp Ferodo DS2500 for Rear M2 Comp Here are the videos on bedding: |
|
Appreciate
0
|
07-08-2022, 10:42 AM | #33 | |
Lieutenant
509
Rep 533
Posts |
Quote:
|
|
Appreciate
1
jritt@essex1029.00 |
07-11-2022, 10:16 AM | #35 |
Lieutenant
509
Rep 533
Posts |
|
Appreciate
0
|
07-11-2022, 11:04 AM | #36 | |
Lieutenant
535
Rep 436
Posts |
Quote:
|
|
Appreciate
0
|
07-13-2022, 01:07 PM | #37 |
Captain
676
Rep 900
Posts |
Mine have squealed in normal suburban driving almost since Day 1. I was able to temporarily quiet them by doing several hard stops. Since then the noise occasionally comes back but not as loud or frequent as it once was.
Just did my first track day (with this car) this past Monday and no more squeal. We'll see how long that lasts though.
__________________
Vehicles: 2021 Alpine White M2C 6MT; 2011 Kawasaki Z1000 (1/4 mile 10.3 seconds @ 129 mph - stock)
Previous: 2018 Camaro 2SS 1LE 6MT; 2015 BMW M235i 6MT; 2015 Mini Cooper F56 6MT; 2005 Mustang GT 5MT; 2003 Mini Cooper R50 5MT |
Appreciate
0
|
07-13-2022, 02:47 PM | #38 |
Lieutenant
509
Rep 533
Posts |
I did some canyon carving this past weekend, and the brakes quieted down on that drive... drove it for the first time today post weekend drive, and the brakes squealed like a hog under a gate first traffic light I came to. I just smiled, and thought to myself. School Bus!
Honestly, it's bothering me less and less... maybe I am just getting used to it, or maybe I'll invest in the pads in the above post from vendor. I haven't yet decided. I do appreciate all the input on this topic so far though. |
Appreciate
0
|
08-05-2022, 07:43 AM | #39 |
Lieutenant
560
Rep 570
Posts |
The F8X brakes should have zero noise if you keep everything stock.
Both my M4 and M2 never made a peep w/the factory pads. It's likely down to lubrication and a wonky set of factory pads. When I track the cars, I use PFC and Pagid race pads. When going back to stock pads - silence They are shimmed from the factory and have a mild compound. Shouldn't squeal at all |
Appreciate
1
chris7197392.00 |
08-05-2022, 08:52 AM | #40 | |
Private First Class
254
Rep 159
Posts |
Quote:
|
|
Appreciate
1
10SecGG508.50 |
08-07-2022, 06:24 AM | #41 | ||
Lieutenant Colonel
1120
Rep 1,644
Posts |
Quote:
|
||
Appreciate
0
|
08-08-2022, 04:00 AM | #42 | |
Major General
7392
Rep 7,340
Posts |
Quote:
|
|
Appreciate
2
10SecGG508.50 keylime503629.50 |
08-18-2022, 07:23 AM | #43 |
BimmerPost Supporting Vendor
1029
Rep 842
Posts |
Gents,
Please keep in mind that the pad transfer layer must be maintained on discs if they are to remain silent. That's one of the reasons we all see so many conflicting reports about XYZ brake pad being noisy or quiet. Owner A says, "Mine never make a peep!", while Owner B says, "My pads sound like a freight train!" When you bed in your pads/discs and lay down a pad transfer layer, that layer is only temporary. Anytime the brakes are run cold, the pads act in an abrasive manner and the pad transfer layer is perpetually being scraped off. When the brakes are used hard and get hot enough, the pads no longer act in an abrasive mode. Instead, they work in an adherent mode and start to stick to the disc face, laying down a pad transfer layer. If you drive around with cold brakes in a daily driving style, using them infrequently and lightly, they are in pure abrasive mode. They will be continually scraping off any transfer layer that you had on the discs. Over time they will just get noisier and noisier. Why wouldn't they? There's nothing to quell the noise and vibration between the pad and the disc face. If you get them hot enough however, they will start to stick to the disc face. They will lay down a thin layer of pad material on the disc face, and the face of the pad itself will conform to the shape of the disc face. The pad face then rides on the layer of pad material on the disc, which acts like a cushion. The pad layer dampens squealing noises and vibration. This is why many times people are driving around on the street and their pads are making scraping and squealing noises...but when they go to the track, their noises are magically gone. That's just because they didn't get the pads hot enough to switch into adherent mode until they went to the racetrack and got them hot enough to do so. Then for a week after a track day, you drive around on that nice pad transfer layer you laid down and the brakes are silent. Three weeks later however, after lots of street driving, that pad transfer layer starts to wear off because you've only been running the pads in their abrasive mode of operation. The pads are perpetually scraping the discs clean as you go to work, grab groceries, and pick your daughter up from school. Then the dreaded squealies return. |
Appreciate
4
|
09-08-2022, 01:01 PM | #44 | |
Major
630
Rep 1,227
Posts |
Quote:
Boy was I wrong. These things are loud as hell now on the street. I re bed them in and it seemed to be quiet for a few days but then the noise came back. I never fully understood why but having read this post now it all makes sense. Thanks.
__________________
|
|
Appreciate
2
10SecGG508.50 jritt@essex1029.00 |
Post Reply |
Bookmarks |
|
|