09-24-2014, 12:02 PM | #1 |
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6/4 pistons vs 4/2 Worth extra $$ ?
I am wondering what people's opinion are on the M performance brake package which are 4/2 F/R piston calipers Brembo Labeled with "M" vs the 6/4 F/R Brembo labeled kit that can be found online? The M performance fronts measure 370x30 mm in front and 345x34 in back. The Brembo GT kit measures 380x32 in front and 345x28 in back. Price is $2800 for full M Performance kit vs $4595 for the GT front plus $3695 for the GT rear kit. $8290 total. Is the braking power worth the price ?
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09-24-2014, 12:11 PM | #2 | |
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09-24-2014, 12:41 PM | #4 | |
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09-24-2014, 12:43 PM | #5 | |
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RETIRED: 2018 440xi GC, Carbon Black on Black/Blue 2014 M235i Black on Black, DINAN Stage 2 |
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09-24-2014, 12:45 PM | #6 |
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The number of pistons in the caliper differ. How does that affect breaking performance? More surface area being held? Are two pistons worth the price difference? If they were carbon ceramic rotors I could see it, but from what I can tell the GT kit is not carbon ceramic.
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09-24-2014, 12:48 PM | #7 | |
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the more pistons the less work a single pistons have to do |
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09-24-2014, 01:12 PM | #8 |
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Just to get things straight, as pikcachu said, the standard brakes on the M235 (blue calipers are standard with blank discs) are the same calipers you get on the M Performance option, just different colors. The discs themselves I haven't been able to verify that they are any larger in diameter, they do have dimples and slots which may help dissipate heat, but I doubt it will do much.
On the other hand, the Brembo kit is indeed an upgrade, but whether it is worth it is again hard to say. You do not have the car yet, I assume. I'm not a track junkie, but most that I know go through parts like crazy people. I would say the most prudent thing is to learn the car, its limits and shortcomings and go from there. Spending money for the sake of spending money is not really in my vocabulary. |
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09-24-2014, 01:18 PM | #9 |
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To reiterate you really need to learn the car first. I took my e92 out to the track a few times and quickly realized that the weight of the car far exceeded its braking capabilities on a track. They were good, but could really use help. But even with better pads, the weight was still too much for the tires and chassis. I could make it slightly better by getting better tires and coilovers, but the bigger problem was the weight. Brakes just help get the wheels from spinning... tires are what actually stop the car via friction. The biggest most heat dissipating brakes in the world aren't going to help any car stop on a wet road with slicks on doing 80mph any better than a crappy set of brakes. (huge hyperbole I know, but just making a point)
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09-24-2014, 03:54 PM | #10 | |
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Last edited by boost82; 09-24-2014 at 03:59 PM.. |
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bbk, brakes, brembo, m performance, m235i |
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