10-18-2016, 08:21 PM | #67 | |
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10-18-2016, 08:38 PM | #68 | |
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10-19-2016, 09:21 AM | #69 |
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BMW would like you to replace the rotors as often as possible. Better to err on the safe side and make more money (for them). That's OK, but even though the parameters for examining and evaluating the wear indicators are fairly specific, the actual process of estimating their condition visually is somewhat subjective and error prone.
The only precise method of determining rotor wear is to use the Carboteq instrument. In fact, industry wide (BMW, Porsche,...) stamp their discs with the starting and min Carboteq inductance value in three places on each disc. This even includes the laser alignment mark required to use the instrument. BMW recognizes that most folks will not have access to this type of equipment (inc their service centers) and has no problems suggesting that the visual indicators, or rotor weight, be used to "estimate" when rotors need to be replaced. Conservative and lucrative! I'm working with my friends at INd and they are working to set themselves up as a distributor for the Carboteq device. I'm expecting their first sale to go to me once they get the relationship established. Although the device is not cheap, it could easily pay for itself if it saves one premature CCB rotor pair replacement...
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https://f80.bimmerpost.com/forums/sh....php?t=1645366 https://f80.bimmerpost.com/forums/sh....php?t=1197553 https://f80.bimmerpost.com/forums/sh...4&postcount=35 |
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10-24-2016, 05:02 PM | #70 |
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CCB rotors for sale
Hi guys, I am selling my CCB rotors from my 2015 M4
$3,000 OBO. Here is the link to the ad over in the classifieds. http://f80.bimmerpost.com/forums/sho....php?t=1317903 |
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10-24-2016, 05:28 PM | #71 | |
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I didn't know I couldn't do that. But I did know I couldn't do that.
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10-25-2016, 01:14 AM | #72 | ||
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10-25-2016, 09:54 AM | #73 | |
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10-25-2016, 10:46 AM | #74 | ||
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So far there have been variances of +120g to +380g on used discs, and new ones in between. Instead of continuing to go round and round, I called a contact in Garching last week and the info is 5 days past due. |
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10-25-2016, 11:41 AM | #75 | |||
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Please excuse my ignorance but what's Garching? |
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10-25-2016, 01:18 PM | #76 | ||||
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Are they done? According to the guidelines for initial visual inspection they are and have been for some time. Are they safe? I would fail the car at safety inspection and not allow it on course. |
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10-29-2016, 01:20 AM | #77 |
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So given the data we have now regarding the CCB, does one think they are still worth it, with the idea that you're going to swap to RB Irons & pads for track use, and swap back when not planning on tracking for a longer period of time?
I'm still debating ticking the CCB option on a 17/18 F80 M3 order. |
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10-29-2016, 05:19 AM | #78 | |
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10-29-2016, 03:22 PM | #79 | |
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I'm still curious to hear reviews on the 6/4pot CCB calipers with the Iron conversions, guess I'll heave to do some.. |
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10-29-2016, 05:53 PM | #80 | |
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The big drawback of going with iron rotors on the CCB setup is the rather steep increase in unsprung and rotating mass.
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10-29-2016, 11:56 PM | #81 | |
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I like the stock irons with Pagid pads for track work, but I do manage the brakes a little. If I don't, I can only put on 2-3 quick laps before the brakes overheat. (At least at the tracks I've been to). I mean I still think you're getting better value from a well chosen BBK over the CCBs, at least for the track. But if say "inherit" a car with CCBs (if you buy secund hand or leftover dealer stock) and don't want them, this would be a good choice maybe.
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11-01-2016, 09:47 AM | #82 | |
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Do you think moving to the iron rotor would help the squeal of the CCBs? I'm worried that it's more of a caliper design issue than a CCB rotor and pad issue. |
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11-01-2016, 09:55 AM | #83 | |
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Track pads for the iron rotors are also more biased towards adhesive/transfer friction, hence why they share behavior traits with the CCB such as squealing, less bite when cold/wet and better resistance to fade and high temperatures. So going with iron rotors paired with street pads (that rely mostly on abrasive friction) would mostly eliminate the squealing IMO.
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11-01-2016, 10:00 AM | #84 | |
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They actually squeal when NOT braking as well lol. For whatever reason turning the wheel slightly also gives off a noise. |
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11-02-2016, 07:59 AM | #85 | |
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The ultimate solution for me was to do the Racing Brake iron rotor conversion which I don't have the link to but you can find on here if you search. I think the total cost was $3,500 including the new pads, etc. The good news is that I was able to sell the CCB rotors and OEM pads for close to what the new iron rotors cost. So now the brakes are quiet, performance is still awesome. The extra mass is noticeable at first but it doesn't take away from my driving enjoyment. |
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11-02-2016, 11:40 AM | #86 | |
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So you did the RB conversion and it got rid of ALL noise!? I may seriously have to do this. |
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11-02-2016, 12:12 PM | #87 |
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Yup. It is the ultimate solution. Here's the link to the conversion kit:
http://www.racingbrake.com/RB-2pc-Ro...bmw-irk-11.htm |
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11-02-2016, 12:16 PM | #88 | |
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http://f80.bimmerpost.com/forums/sho...cb+maintenance |
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