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09-13-2013, 10:58 AM | #23 |
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Per the coding, I'm with you - I don't really know why the car would need it, but I do know that the procedure is outlined in the BBK installation instructions (car must be coded with "retrofit - sport brakes" or something like that), so it's not like some dealer made up crap. The only thing I can think of is that it tweaks some of the computer systems that interact with the brakes (ABS/DSC/etc.) while obviously doing nothing to the brakes directly. Who knows? I have a tough time that BMW would write it into the instructions if it were complete BS.
And no, I'm not at all experiencing fade, but I was planning on going for a more aggressive compound pad, like HP+, which I'm sure you know is a pretty popular AX pad. My impression was that people did this to stop better. Is it just about feel, then?
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09-13-2013, 11:11 AM | #24 | |
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E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.22] |
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But when it comes to auto-x, you're not dragging the brakes nor are you doing hi speed hard stops as if you were on a road course. You want to shed enough speed quickly to set yourself up for the next turn and quickly get back on throttle. This is actually one area where auto-x and road courses differ; auto-x has very choppy input, road course requires smooth inputs. Some may prefer better initial bite even on street (and that's why many run Hawk HP+ on street), others prefer a more linear feel. I'm more of the latter, plus I can't stand how bad Hawk pads squeal and dust. Hope this answers your question. |
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09-13-2013, 11:46 AM | #25 |
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I can see this thread has adopted a more constructive tone as of late, although I would like to say that the high and mighty attitude is discouraging to the BMW enthusiast who is not quite as knowledgeable as he/she would like to be. I can't spell breaks either, HELP ME!
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09-13-2013, 12:10 PM | #26 |
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The performance brakes certainly have a wider selection of pads, at least as far as I've seen. Might be a good option for autocross in that case.
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09-13-2013, 10:36 PM | #27 | |||
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09-14-2013, 07:40 AM | #28 | |
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That sucks, 135i brakes bolt on well for me haha |
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09-14-2013, 02:17 PM | #29 |
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I've had this "discussion" with Stig in the past and had to eat crow cause he was right. That said, I've tracked my car only once. I had no brake fade at all. I also didn't experience the overheated pistons that the 135i guys do. Is that cause I'm slower and more inexperienced around the track, or I'm easier on the brakes, I don't know. What I do know is they look great. That is really the only fact I can say about them. Have any 128i guys that track with the perf BBK had the overheating problems of the 135i, or do we not have enough power to get them to the failure point a full bolt on 135i has. Please chime in if you have any experience.
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09-15-2013, 03:11 AM | #30 |
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I remember reading that we can use the BMW X3 3.0si's brake assembly on our 1ers. Doesn't that sound like a more appealing route to take since the rotors and calipers are larger?
Seriously don't flame me, I just change brakes with my dad, I am not a professor who gives lectures on the subject.
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09-26-2013, 08:09 AM | #31 |
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I've read the 135i brake thread (it has a sticky) but it doesn't seem like the issue is totally sorted. The ceramic topped pistons are a good bit of the issue but it also seems like the relatively thin rotor is part of the problem. The component you want to cool is the rotor. You don't want the caliper getting hot - that is where the fluid is - you want the rotor cooling off so the caliper doesn't get too hot. Bigger rotors with larger air passages with slots or holes and brake ducts are all ways of cooling off the rotor (I like slots more than holes because holes are also stress risers).
I would expect a little difference in stopping from larger rotors because they will get hot more slowly. One panic stop doesn't heat the brakes a ton but still they should be slightly better - a few feet (maybe less). The primary advantage is clearly with hard frequent use - like on a race track. That is where the heat builds up and the cooling advantage would be experienced. Pads have different characteristics. Racing pads are made to function better hot. On everyday driving, they may actually not stop you as quickly and may require more force. 135i and 128i brakes are quite different. 135 brakes have a bolted in position caliper with pistons to push the pads against the rotor on both sides. 128i brakes are the more typical sliding variety where a piston on the inside pushes and the caliper moves to pinch the outside pad against the rotor. 135i design seems more elegant but there are also a lot of pistons and seals. 128i type is undoubtedly lower in cost but works quite well. Anybody try 330i rotors and calipers? Is the rotor larger? It isn't high "bling" but I painted my stock 128i calipers. The bling factor is consistent with the cost (about $20, I used a brush on duplicolor kit).
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09-26-2013, 11:01 AM | #32 | |
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Did u just misspelled pedal?....oh no, u are really showing ur lack of understanding of the BMW brake system!
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09-26-2013, 12:47 PM | #33 |
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I don't know about "matacuero" but my standard excuse is engineers can't spell. That is what spell check programs and administrative assistants are for.
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04-07-2015, 02:07 PM | #34 | |
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I'm considering buying a 2013 128 and want to upgrade the brakes also. I looked first at BMW Performance kit but don't like the silver rears especially for the price. So the next most obvious choice is the BMW 135i kit. Turner shows them but doesn't give me the BMW part numbers to price them. Anyone know the kit part number or best place to buy it? Also anyone know if they fit the 17" 128i M-sport wheels? Finally, I feel very confident in doing the swap myself but I read that they require a reflash at the dealer. Anyone have any experience with this? Did the dealer give you a hard time or charge $2500 for the reflash? I wish I could just find a lightly used or New old stock set of the all four yellow BMWP kit! Thanks |
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04-07-2015, 03:03 PM | #35 | |
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04-07-2015, 03:10 PM | #36 | |
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04-07-2015, 04:20 PM | #37 |
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I think the rear 135i calipers do not just swap over. I don't know if you have to just make a bracket for it to work, or you need a 135i knuckle. I have not really looked into it.
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04-07-2015, 04:33 PM | #38 | |
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135i caliper bolts on, just cut and bend away the dust sheild. Handbrake will not function. You need custom brake shoes.
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04-07-2015, 08:58 PM | #39 | ||
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04-07-2015, 10:26 PM | #40 | |||
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Why I didnt flash is because all the e9x guys have no option for a flash even for Front only BMWP kits. They just ride on 335 brakes without problems. If you must flash, its 2 hours labour - $300 ish, Called "BMW Sport brake update" Dealer will probably force a flash for a BMWP 128i kit. The rears will need one mod. Rear dust shield needs to have some incisions made and bent away like a flower petals. For hand brake, you have to make custom shoes. e90post has most info on this. - Most make 128i brake shoes larger, it requires cutting 135i shoes in a C shaped cut and attaching to 128i - it is possible to make 135i brake shoe fit using more parts( 135i back plate pieces). But you will need to add a triangular metal from 128i shoes to make sure 135i shoe catches the Brake shoe pivot point on the rear knuckle - the previous solution can have welding avoided if you use e46 m3/e60 hand brake shoes direct from BMW( aftermarket cut corners and shave off metal you need). Then one has to file away the metal that is not needed to match the 128i catch point. Potential problem is that e46 m3 brake shoes may be 30mm wide compared to 135i which are 20mm wise. The rotor may have a groove that can have a problem with this.
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04-07-2015, 11:59 PM | #41 | |
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I wish BMW just offered the original matching 4 wheel set to just make things easier. |
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04-27-2019, 12:37 PM | #42 | |
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I know your post is 4 years old but do you recall if any other parts need swapped, or just the supporting ring? Last edited by Jeb_; 04-27-2019 at 12:42 PM.. |
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