05-21-2018, 03:31 PM | #67 | |
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05-21-2018, 03:35 PM | #68 |
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BMW, are you listening?
This whole thread is confirmation that if you are considering the brake upgrade as standard in the US model, you should instead reduce the base price by the cost of that upgrade and offer it as an option. There is a STRONG contingent here who would rather not have the upgraded brakes for one reason or another. (But obviously you would piss people off if you decided to make them an option but kept the base price the same). There we go, folks - our collective plea has been made. This solution gives you the option without an increase in price (actually a reduction if you opt out).
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05-21-2018, 03:35 PM | #69 |
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05-21-2018, 03:36 PM | #70 | |
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05-21-2018, 03:42 PM | #71 | |
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PS.. the M2 Competition motor is detuned... (ahem.. weight optimised in BMW speak) and is not providing the full M3/M4 power and no reason has been provided for that either.. |
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05-21-2018, 03:44 PM | #72 |
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They are the same brakes but there are far fewer complaints about the blue brakes on the M3/M4. I think there is better airflow to cool them on the M3/M4.
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05-21-2018, 03:46 PM | #73 | |
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also explains why bigger brakes might be needed with the twin turbo motor.. also explains why vented fenders are available in the M performance catalog, to go over those bigger brakes... |
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05-21-2018, 03:53 PM | #74 | |
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05-21-2018, 03:55 PM | #75 |
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05-21-2018, 03:56 PM | #76 |
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05-21-2018, 05:46 PM | #77 |
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Exactly! It happened to every single M3/M4 I have seen on the track including mine (except for beginners who don't really push the car and those who have CCBs).
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05-21-2018, 05:48 PM | #78 |
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05-21-2018, 06:13 PM | #79 | |
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The majority of my 35K kms so far with my M2: German Autobahn and mountains.
On long Authobahn drives (many consecutive hours of driving) I experience some mild brake vibration and mild fading after some time, as a result from repeated braking at very high speed. Why 'repeated braking' and not simply releasing the throttle to slow down ? Well, I guess you know how the Autobahn works: once you get the famous "no speed limit" sign you can take your car all the way to the limit (± 270 km/h for a delimited M2), of course depending on road conditions and road traffic (safety first). But at some point a speed limit sign shows up out of the blue and you must decelerate quite quickly to abide to it (you certainly don't want German police to stop you for speeding). If you see it from faraway you can simply release the throttle and eventually mildly brake, but sometimes you got to slam the brakes. Or another road user forgot to use the mirrors and suddenly moves to the left lane upon your approach, requiring you to slam the brakes. For other's safety and your own safety, you got to anticipate all the time that those things can happen. Also lots of road works require you to slow down (mostly announced in advance). And subsequently there's the "no speed limit" sign again, or the slower car moved to the right again, and you can floor the throttle again. This acceleration/deceleration pattern goes on and on if you fancy a spirited Autobahn drive (but sometimes you prefer to cruise at high speed instead of very high speed). As you can imagine, those repeated hard decelerations strain the brake pads: energy - heat. And so after some time you hear this kind of 'voooaaam' noise when hitting the brakes, whilst experiencing a mild vibration under your right foot pushing the brake pedal (and sometimes some mild fading too if intense decelerations have been frequent). Mountain drives: even during stints ranging from 8 up to 12 hours, my M2 brakes keep up quite well for me. Of course you got those variations: uphill driving, downhill driving (more demanding for brakes), cruising through valleys, chilly temps way up high, hot temps in the valleys. But IMHO it mostly depends on your braking behavior. Alike karting: don't overuse the brakes. When following a car in the mountains, you can fairly easily spot if the driver is used to mountain driving: those who don't brake often whilst keeping a steady pace through the turns. And if you notice a burning smell or even see smoke evaporating from the front wheels: no good (the driver in front of you is cooking his/her brakes). Quote:
This was last Saturday (encountering rain and sun in the Dolomites the same day):
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05-21-2018, 06:22 PM | #80 |
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Mine are grey-ish blue: the brake dust caliper syndrome.
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05-21-2018, 06:43 PM | #82 |
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Sounds like your ABS doing its thing.
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05-21-2018, 06:51 PM | #83 |
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For some reason or another BMW cheaped out standard brake finish. I've seen discoloration on STi Brembo calipers as well. Porsche Brembos don't seem to have same problem, they must use a higher quality coating.
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05-21-2018, 06:55 PM | #84 |
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Nope, that ain't ABS. I know the 'marbles-massaging-my-foot' feel of ABS.
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05-21-2018, 06:58 PM | #85 | |
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05-21-2018, 07:10 PM | #86 |
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Does either the standard blues or the upgraded option suffer from knock back?
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05-21-2018, 08:14 PM | #87 |
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You'll need the big brake kit to help stop the car with the extra weight of those big brakes...oh wait!
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