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07-17-2009, 04:52 AM | #23 |
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Single caliper brakes FTW.
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07-17-2009, 05:19 AM | #24 | |
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The rear calipers were indeed sliding... I stand corrected. |
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07-17-2009, 07:23 AM | #25 |
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I found a couple of info. regarding this subject I'm not sure how true this is since BMW still does not offer brembo:
http://www.zercustoms.com/news/Bremb...s-for-BMW.html http://www.motorauthority.com/bmw-no...bo-brakes.html |
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07-17-2009, 07:29 AM | #26 | |
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07-17-2009, 09:27 AM | #27 | |
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Now does that mean there aren't owners who need the better breaks and will ultimately purchase an AP racing system or other BBK? NO. But, I would venture to say 5% or less of //M3 owners in this country need more than a pad and fluid upgrade. For BMW to jack the price of the //M another 3, 4, or even 5k for something that few owners need, and thus turning a loaded e92 into a 80k car after tax and tags, they may in fact lose some customers and lose money for something few would really need. I think BMW made the right call. Cheers, e46e92
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07-17-2009, 11:23 AM | #28 | |
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Front rotors are strap-drive, rears are fixed. The quality on the AP systems are second to none.
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07-17-2009, 11:27 AM | #29 |
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Being (a little) more serious for a moment, you are definitely correct that BMW rightfully should spare burdening 95% of the owners from the extra expense. Besides, I'd much rather spend less on sliding calipers if I was going to remove them anyway. Paying extra for marginally better (if any better at all) calipers like the STI/Evo/etc. boys do is a waste and I believe that the BMW engineers know that and won't go the lower spec Brembo route. The most serious runners of those vehicles upgrade the brakes to something more serious anyway as the pedal feel is just not what one would expect from fixed calipers. All that said, I would have loved to be a fly on the wall when the discussions were taking place over the 135i brakes!
Fortunately for me, I get to work with the 5% group every day. It's a lot more fun! |
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07-17-2009, 01:07 PM | #30 |
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My biggest issue with BMW is difficulties with (at least) some dealers who flag your car if it has aftermarket parts, and a BBK is a real red flag. "I see your race your car...."
So spend $5k+ and loose your warranty. Great. Or put the OEM back on prior to each dealer visit. A little flexibility by BMWNA would be most helpful, such as offering approved kits and/or providers. |
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07-17-2009, 04:20 PM | #31 | |
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07-17-2009, 06:19 PM | #32 |
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Yes, you are right. But so much depends on the attitude of the dealer's staff. They may be willing to help; they may not. Some form of support from BMWNA would help the enthusiast, which is presumably a core part of the BMW market.
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07-17-2009, 08:36 PM | #33 | |
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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07-22-2009, 08:44 AM | #35 |
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NO, and it wouldn't matter even if they could be physically fitted to the M3 anyway.
It's not that simple when it comes to modern braking systems...
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07-27-2009, 05:39 PM | #36 |
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Why would you even remotely consider that???
The stock calipers/rotors will outbreak just about any production car out there in the M3's price range--even if they were shipped with Brembos. Stock vs stock an M3 will outbreak a 135 for sure in any context. The car has immense stopping power on the track stock. The issue is that it doesn't have brake cooling, which does not require a $7k investment.
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07-27-2009, 05:51 PM | #37 |
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I am aware that the standard setup on good pads, fluid and braided hoses will probably be more than enough for anyone on the track. I used to have AP 6 pots on the front of my E46 and AP 4 pots on the rear. It wasn't just the braking power (which is limited by grip anyway) it was the immediate bite and confidence inspiring pedal feel that I liked. For me, that relief feeling when you hit a situation and the brake pedal has a serious effect immediately is worth a few Łk.
What I would ask Chris from AP, is this. People keep saying to me, u can upgrade the front to 6 pots and u don't need to do the rears as they don't do much of the work. Can you tell me whether that is right or wrong? I just can't figure out how you can upgrade the fronts massively and NOT upgrade the rears without causing brake bias issues. I also am struggling with the idea that the AP kit doesn't come with 380mm discs as the sizes of the kit is basically the same sized discs as standard (appreciate they may be slightly thicker?). Cheers! Steven_RW |
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07-27-2009, 05:56 PM | #38 | |
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Some people just don't get it. I'm afraid this argument is going to be a losing battle. If you must have Brembos then just go buy them on your own. The number of owners that actually need them would probably be about 1% of all M3s made. Unless you're a serious track junkie, you won't need them. BBK for a street car is plain retarded because it all show!
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07-27-2009, 07:09 PM | #39 | |
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On the rear upgrade issue, there are two things to consider - 1) Temperature vs. brake torque: The rears generally run cooler (not on ALL cars, however) and will cool more quickly. However, increasing the brake torque on the front axle alone will usually increase stopping distance, at least at threshold braking (impending lockup). It's not as big of a deal on the E92 M3 as the front is not too much bigger than OE, but it can't simply be dismissed either. Personally, I would not do fronts only or recommend it to anyone else. But, hey, my kids don't always listen to me either! 2) Pad choice: Fortunately for most M3 owners, most pad manufacturers respect them enough to produce many compounds in the OE pad shape. However, with well-known, fixed multi-piston calipers, nearly all pad compounds are available. When dialing in the car for a particular track, sometimes a different rear pad can be used when other adjustments are too abrupt or just not readily available. I've done this with professional or highly-experienced amateur drivers in the past with sometimes fantastic results. Other times, well, we'll just call those learning experiences... No, BBK's aren't for everybody, but I don't like to drive a track vehicle without them. The feel is just so predictable and so good. They inspire the confidence I need to push it hard without getting in over my head. That said, I worry too much about what others might or might not say at the local meet or car show. I'm tough enough to satisfy without concerning myself with pleasing anyone else. Unless, of course, they are running better lap times. Then I'm all ears! Do I NEED a BBK? I don't know. Do I NEED an M3? Chris |
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07-27-2009, 07:21 PM | #40 | |
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07-27-2009, 07:50 PM | #41 |
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How many of you have even faded the stock brakes, anyway?
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07-27-2009, 08:27 PM | #42 |
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Hey guys did we forget that BMW brakes are covered under the maintenance plan ?
Do you realized how much a change of pads and Brembo rotors will cost ??
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07-27-2009, 08:38 PM | #43 |
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Me. On a not-very-hot day at the track the last few laps of the afternoon runs were a little scary in spots, I found myself stomping pretty damn hard to get what I would consider effective braking.
This was with stock everything, though - the RS19's the 600t brake fluid are on for this weekend and I expect a significant improvement, even with 100+ temps.
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07-28-2009, 04:15 AM | #44 |
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I plan to get a BBK when I take delivery. I'm not going to kid myself, it is partly for looks.
I like overkill/confidence factor. I am willing to gamble my money that a well designed BBK can handle more heat than the OEM brakes. Will I ever hit the thermal limits of a BBK? Hopefully not. Last thing is the removable bridge option. My future M3 will be a dual duty street/track car. The removable bridge saves a lot of work when changing from street to race pads and vice versa. For me the initial cost won't matter and I won't lose money on the BBK from selling it. That's because I'll keep my car for a long time...unless something really bad happens. I would never do this if I were only planning on keeping my car for a couple of years.
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