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  1. #1
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    135i Performance brakes upgrade

    After all the problems I encountered on trackdays (autocross) with overheating brakes, tirepressures running wild due to heated rims caused by brakesdisks, I decided to mod the car to get rid of this problem.
    But I was not prepared to spend $5000,- on a Brembo big brake set, which also would cause me to order a new 18"set of winter rims instead of my 17"set. So I did the next best thing. I ordered a set of BMW Performance brake disks, with a set of new pads.

    Click here to enlarge


    Yesterdayevening I went to pick them up.
    The front disk set is perforated and slotted ventilated disks. It is also a 2 piece rotor, with the center piece being aluminum, and rivited to the disk.

    Click here to enlarge

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    The rear disks are one piece, ventilated, dimpled and slotted disks.

    Click here to enlarge

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    They have such beautiful bags at BMW. You would almost want to hang them on the wall Click here to enlarge
    This one is filed with new wear sensors, caliper clips, disk fastening screws, bags with brake grease and other tiny stuff.

    Click here to enlarge

    This set will go on the car within the next few weeks.
    I will update with pictures once the set is on the car.
    There are two theories to arguing with women. Neither one works

  2. #2
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    Surprised nobody has commented on this. Awesome stuff David!

    When are these getting installed?

  3. #3
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Surprised nobody has commented on this. Awesome stuff David!

    When are these getting installed?
    Thanks.
    These will go on the car when it goes to the local shop second week of October.
    I simply do not have an opportunity to drop the car off sooner then this.
    I will be combining the diskchange with a repaint of the rear diffuser and after thursday it is probably better to have the car realligned as well.
    There are two theories to arguing with women. Neither one works

  4. #4
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    Click here to enlarge Originally Posted by DavidV Click here to enlarge
    Thanks.
    These will go on the car when it goes to the local shop second week of October.
    I simply do not have an opportunity to drop the car off sooner then this.
    I will be combining the diskchange with a repaint of the rear diffuser and after thursday it is probably better to have the car realligned as well.
    Gotcha, will wait patiently to see them mounted.

  5. #5
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    good stuff man.

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    Looks Great. can't wait to hear about the difference

  7. #7
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    thats pretty cool/smart. I was going to buy r32 brake system for my GTI because of the bigger calipers and rotors kinda the same concept.... Do you think you can do the same with this? Buy an m3 brake system and put it on this car? calipers pads rotors brake lines etc..
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

  8. #8
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    Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
    Buy an m3 brake system and put it on this car? calipers pads rotors brake lines etc..
    I'm not sure M3 brakes will fit. probably would need to have a lot replaced on all 4 corners, and the main brake cylinder as well....
    But I do not need to change my calipers.
    I already have the "performance "Calipers because I have the M-spec 135i. They are grey instead of yellow, and they have a print that says BMW instead of Performance, but they are the same callipers! The only difference is the standard 135i brakes are normally ventilated disks. The performance disks are the ones I just ordered. They are interchangable.
    And the Performance disks are only marginally more expensive then the original disks.
    It's just me that wants to change the pads along with the disks.
    There are two theories to arguing with women. Neither one works

  9. #9
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    Actually I'm quite sure E92 disks will not fit. I researched that already, because I actually wanted lighter brake disks as well. For the E92 you even have chioce in what brand of light brake disks you want, even for the rear disks. For the E82 however there are no companies I found that offer lighter slotted/perforated brake disks.
    These disks are quite heavy.
    I will put them on a scale before they go on the car to know what they weigh.
    There are two theories to arguing with women. Neither one works

  10. #10
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    awesome man, sounds good. can't wait for a little review when they're installed
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

  11. #11
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    Nice! How much were the performance disks?

  12. #12
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    Let us know how they work out. I've been thinking of getting the performance brakes until I can afford Stoptech or Brembo big brake kit.
    2010 335i Coupe Le Mans Blue
    *JB4 Powered*

  13. #13
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    Click here to enlarge Originally Posted by DarkPhantom Click here to enlarge
    Nice! How much were the performance disks?
    The rear disks were 150,- + VAT each, the front disks were 167,- + VAT each.
    Mind you, I already have the "performance" calipers, just that they are grey with BMW on them instead of yellow with Performance on them.
    Same calipers.
    There are two theories to arguing with women. Neither one works

  14. #14
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    I just picked up the car. The disks are on, with new pads and sensors as well.

    Click here to enlarge

    Click here to enlarge

    How do they break?
    Honestly?
    Like crap for now. But that makes perfect sense.
    The pads and the disks first need to fall in love. That takes up to 500 km. I will put them through some heat cycles first, and wear them a bit.
    All in a controlled sequence.
    I will report on the performance once that is all done, so I can give a honest review.

    But for looks, they already are the business Click here to enlarge
    There are two theories to arguing with women. Neither one works

  15. #15
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    Click here to enlarge Originally Posted by DavidV Click here to enlarge
    I just picked up the car. The disks are on, with new pads and sensors as well.

    Click here to enlarge

    Click here to enlarge

    How do they break?
    Honestly?
    Like crap for now. But that makes perfect sense.
    The pads and the disks first need to fall in love. That takes up to 500 km. I will put them through some heat cycles first, and wear them a bit.
    All in a controlled sequence.
    I will report on the performance once that is all done, so I can give a honest review.

    But for looks, they already are the business Click here to enlarge
    Definitely do look good.

  16. #16
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    I am totally pissed off at the garage where they installed this.
    3 weeks after the install and the car still brakes like a Fiat Panda.
    I did some break in procedures, and drove around for 400 miles+, but the car brakes like a wet newspaper.
    On dry tarmac, with brakes full, in 1st I drive straight thrue them on all 4 corners.

    So upon closer inspection, it turns out the shop is full of lazy bastards. They did not remove the protective coating off the disks before installing them, but thought the testdrive would take care of that.Click here to enlargeClick here to enlargeClick here to enlarge

    Well, it did. So my brakepads are coated with paintresidu.

    You can actually see it in the picture of the rear wheel.

    I went back to the shop today. They admitted that they could possibly not have done a good enough job, and offered to sand the pads and clean the disks.
    First opportunity is 10 days from now. Untill then I have to drive around like this.
    I am,what shall I say, aggravated Click here to enlargeClick here to enlargeClick here to enlargeClick here to enlargeClick here to enlarge
    There are two theories to arguing with women. Neither one works

  17. #17
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    The protective coating should normally be burnt off from the bedding process, all they should have needed to do is wipe down the rotors to remove any oil residue.

    What bedding process did you use?
    H O O N

  18. #18
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    Click here to enlarge Originally Posted by Snertz Click here to enlarge
    The protective coating should normally be burnt off from the bedding process
    So not a big deal if it gets left on?

  19. #19
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    Click here to enlarge Originally Posted by Snertz Click here to enlarge
    The protective coating should normally be burnt off from the bedding process, all they should have needed to do is wipe down the rotors to remove any oil residue.

    What bedding process did you use?
    I used the Brembo way, 30 brake actions 60mph to 10mph with half a mile inbetween.
    Actually thought about doing the Stoptech way, 10 brakes back to back, cooling dows, and another set of 10.

    Brakes now still are not the same as the original brakes. They feel greast. Not snappy at all.
    The reason for me to change the brakes was for trackdays, to stop the brakes from overheating.
    Not to boot in on brake performance
    There are two theories to arguing with women. Neither one works

  20. #20
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    2 out of 2 members liked this post. Reputation: Yes | No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    So not a big deal if it gets left on?
    Not that I'm aware of, all the installs I've seen of the Perf rotors didn't involve sanding of any sort, just a quick wipe down with brake cleaner.
    Last edited by Snertz; 10-28-2011 at 07:38 PM.
    H O O N

  21. #21
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    Click here to enlarge Originally Posted by DavidV Click here to enlarge
    I used the Brembo way, 30 brake actions 60mph to 10mph with half a mile inbetween.
    Actually thought about doing the Stoptech way, 10 brakes back to back, cooling dows, and another set of 10.

    Brakes now still are not the same as the original brakes. They feel greast. Not snappy at all.
    The reason for me to change the brakes was for trackdays, to stop the brakes from overheating.
    Not to boot in on brake performance
    I see, odd that the Brembo method might not have been enough Click here to enlarge I've used the Stoptech method before with good results, pretty much the same as recommended here : http://www.zeckhausen.com/bedding_in_brakes.htm

    How hard are you on the pedal when you do these stops? IIRC it should be pretty hard, almost engaging ABS but not.
    H O O N

  22. #22
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    I was close to abs, but with wet tarmac.
    % ill do the sroptech procedure tomorrow, see what that brings.
    Can't get any worse really.
    The brakes.do.tend.to perform better when on temperature.
    It is just the initial first brake that was allways crisp, and now is very unresponsive.
    There are two theories to arguing with women. Neither one works

  23. #23
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    Stoptech procedure:

    Bedding-in Street Performance Pads

    For a typical performance brake system using street-performance pads, a
    series of ten partial braking events, from 60mph down to 10mph, will typically
    raise the temperature of the brake components sufficiently to be considered one
    bed-in set. Each of the ten partial braking events should achieve
    moderate-to-high deceleration (about 80 to 90% of the deceleration required to
    lock up the brakes and/or to engage the ABS), and they should be made one after
    the other, without allowing the brakes to cool in between.

    Depending on the make-up of the pad material, the brake friction will seem to
    gain slightly in performance, and will then lose or fade somewhat by around the
    fifth stop (also about the time that a friction smell will be detectable in the
    passenger compartment). This does not indicate that the brakes are bedded-in.
    This phenomenon is known as a green fade, as it is characteristic of immature or
    ‘green' pads, in which the resins still need to be driven out of the pad
    material, at the point where the pads meet the rotors. In this circumstance, the
    upper temperature limit of the friction material will not yet have been reached.


    As when bedding-in any set of brakes, care should be taken regarding the
    longer stopping distance necessary with incompletely bedded pads. This first set
    of stops in the bed-in process is only complete when all ten stops have been
    performed - not before. The system should then be allowed to cool, by driving
    the vehicle at the highest safe speed for the circumstances, without bringing it
    to a complete stop with the brakes still applied. After cooling the vehicle, a
    second set of ten partial braking events should be performed, followed by
    another cooling exercise. In some situations, a third set is beneficial, but two
    are normally sufficient.
    There are two theories to arguing with women. Neither one works

  24. #24
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    1 out of 1 members liked this post. Reputation: Yes | No
    I redid the brake in procedure, now the Stoptech way.
    I must say, the brakes really came alive after that.
    They still do not have the initial bite the old ones had, but they do perform well now.
    ANd they look the business.
    I took some pics today Click here to enlarge

    Click here to enlarge

    Click here to enlarge
    There are two theories to arguing with women. Neither one works

  25. #25
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    Do they perform better though?

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