11-09-2020, 08:45 AM | #1 |
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F80 Brakes Judder - not good under hard braking OEM
Hello All,
I'm new to the F80 M3 but have owned/own many other high performance vehicles and I'm a bit shocked at the braking on my M3. Since buying the car I experience what I can describe as judder or strange frictional vibration from hard braking. So high speed say 70mph to 30mph stops or when in the hills and going downhill hard on highway 9 etc. I would NOT experience this in normal daily driving techniques. Car has CS wheels, dinan HAS, 12mm apex spacers, dinan rear links. Al Brakes are OEM pads/rotors with <1000 miles on them. Car has 20K miles and thrust bushings were replaced ~5K miles ago. Photo attached showing the wear on my front rotors. I've searching and from my reading will chalk it up to bad brake pads or improper bedding. So my question is in simple terms. Are the OEM brakes and especially the pads just simply bad for high performance driving? The previous owner had the brakes/rotors changed a few times under warranty but kept on re-using OEM because of warranty. Thanks for any input:
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Danny
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11-09-2020, 02:05 PM | #2 |
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Clean the perforation holes and check the condition of your pads. Also clear the rear holes of the disc. My back of the disc were completly filled with pad excess and also had a judder.
After cleaning all gone .... |
11-09-2020, 04:11 PM | #3 |
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I appreciate the advice and will try it. just seems odd that a high performance car needs this done every few hundred miles - something isn't right.
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11-11-2020, 02:42 PM | #4 |
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Test without the spacers as well. Not saying they are the cause, but removing a variable could help, and a spacer that's not machines or seated properly can cause vibrations and judder.
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11-11-2020, 06:54 PM | #5 | |
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Swap out the OEM pads for track pads, have fresh Castrol SRF and you should be just fine. I use high pressure water to wash off the pad material/brake dust from the clogged rotor holes early morning right before I head to the track.
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m3elmo49.50 |
11-12-2020, 04:47 PM | #6 |
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i did one track day on oem pads and rotors and it juddered alot after that track day. i tossed them and went bbk for track and 9 runs. Best to follow what aben said and run better pads and new fluid. bmw fluid is trash it was pretty much done after one track day super dirty.
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11-14-2020, 09:07 AM | #7 | |
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thanks. I have new street pads on the way and will flush with new fluid. disappointing that these oem pads are so bad for an M car especially considering their cost.
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11-15-2020, 03:44 PM | #8 | |
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They're not suited for the track because there are no perfect pads for both track and street use, and this is made to be a usable street car. Just swap the pads if you want something for the track. |
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11-15-2020, 06:54 PM | #9 |
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This seems to be a random and recurring issue with these cars, and as far as I can tell, has happened since day 1.
See this thread: Rotors Keep Warping!!! HELP!! Given that the previous owner of your car had the rotors replaced multiple times, I hate to say it, but welcome to the club. I'm on my 4th set of rotors and still have a judder between 40-50mph, but below or above that the car is fine. I've swapped the pads for some ceramics and it helped, but didn't get rid of the issue entirely. BMW also replaced the front wheel hubs with the current set of rotors. All of the replacements have lasted between 500-1,500 miles with zero track days or hard braking so I know the rotors aren't warped.
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11-17-2020, 06:26 PM | #10 | |
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11-30-2020, 05:56 PM | #11 | |
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12-05-2020, 02:11 AM | #12 | ||
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