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      01-12-2013, 09:34 PM   #67
alpina527
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Standard front caliper is 6.3 kg including pads. (14lbs)

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      01-13-2013, 06:44 AM   #68
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RB listed the rotors on the front to be 4.5lbs lighter each and the rear rotors to be 6lbs lighter each, compared to stock rotors.

Total Rotor Weight Savings per RB = 21lbs.

After moving the RB rotors and Stock rotors around in the shop, the fronts rotors felt a lot lighter than Stock ones. I have hard time believing there is only a 4.5lb difference between them. The reason I say this, is because the rear ones felt closer to the stock weight, but yet had a bigger weight difference. Don't get me wrong, the rears where def lighter than stock.

Caliper is listed at 4.5lbs and 6lbs with bracket if I'm not mistaken. The brackets where a lot lighter than stock (like a 1.5lbs). Add pads in at roughly 3lbs granted and you are at ~9lbs for a complete assembly.

Total Caliper Assembly Weight Savings = ~10lbs
^In my org post like a d-bag, I forgot to include a pad weight...sorry guys

My Bad.
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      01-13-2013, 10:04 AM   #69
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Here are the weights of the 3 kits you guys are probably comparing weights to the most. These weights are listed in the sticky: Weight Savings vs. Cost, on this forum section.

BRAKES
Stock assembly (F/R): 37.2/30.7 lbs
F caliper assemb: 14.5 lbs with pads and rubber line (Badfish weighed this)
F rotor assemb: 22.7 lbs (Badfish weighed this)
R caliper assemb: 11.0 lbs with pads and rubber line (Badfish weighed this)
R rotor assemb: 19.7 lbs (Badfish weighed this)

Brembo 365x34 (F) 345x28 (R) Kit
Brembo F caliper assemb: 14.0 lb (weighed by sparkyg)
Brembo F rotor assemb: 24.5 lb (weighed by sparkyg)
Brembo R caliper assemb: 9.5 lb (weighed by sparkyg)
Brembo R rotor assemb: 15.0 lb (weighed by sparkyg)
Cost: ~$6100
Weight savings: 9.8 lbs
cost/benefit: $622/lbs
http://www.m3post.com/forums/showthr...15#post5194815

Stoptech 380x35 (F) 355x32 (R) Kit
Stoptech F caliper assemb: 13.11 lbs with pads & bracket (Badfish weighed this)
Stoptech F rotor assemb: 21.01 lbs (Badfish weighed this)
Stoptech R caliper assemb: 11.15 lbs with pads & bracket (Badfish weighed this)
Stoptech R rotor assemb: 19.33 lbs (Badfish weighed this)
Cost: $5890
Weight savings: 4.6 lbs
cost/benefit: $1280/lbs
http://www.**********s.com/product.a...BK_E92_M3_RS10
http://www.m3post.com/forums/showthread.php?t=150944

Performance Friction 371x32 (F) 372x30 (R) Kit (prototype, production will use slightly ligther brackets)
Performance Friction F caliper and rotor assemb: 28 lbs with pads & bracket (James C weighed this)
Performance Friction R caliper and rotor assemb: 34 lbs (James C weighed this)
Cost: $8000
Weight savings: 12 lbs
cost/benefit: $666/lbs
http://www.m3post.com/forums/showthr...=232463&page=3
http://www.nexternal.com/bimmerworl/Product1060


Hope this helps some.
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      01-18-2013, 08:45 AM   #70
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[/quote]All of the major BBK kits weight about the same as OEM brakes (a little less than std to be fair), which was a big turnoff to me. I DIDN'T BUY THIS KIT BECAUSE I'M CHEAP!!! I bought this kit because I come from a racing history and for my application this I talked to their service department for hours, trust me, they know their Sh*t.

Oh I'm prob letting the cat out of the bag, but someone already asked about. "Why only a 4 pot setup?" Lets just say RB has a surprise for us next season with something bigger and badder (?) for the front end and we can still use the 4 pot calipers on the rear! Sorry RB, but people needed to know that so please DON'T hate me!!!!! Plus now the pressure is on to finish your R&D earlier! [/quote]

Misleading information. !!
I also contacted racing brake and exchanged info with Alex and Kristin and was informed that they are Not working on a rear caliper upgrade.

Link above shows Stoptech 355 kit for 2200 which is less than racing brake kit an offers the rear bbk set so the option is there for the future.
Please clarify

Last edited by Chriskm3; 01-18-2013 at 09:26 AM.
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      01-18-2013, 09:33 AM   #71
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Quote:
Originally Posted by Chriskm3 View Post
Misleading information. !!
I also contacted racing brake and exchanged info with Alex and Kristin and was informed that they are Not working on a rear caliper upgrade.

Link above shows Stoptech 355 kit for 2200 which is less than racing brake kit an offers the rear bbk set so the option is there for the future.
Please clarify
A rear kit will be forthcoming as we worked on both front and rear setups with them.
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      01-18-2013, 12:12 PM   #72
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A rear kit will be forthcoming as we worked on both front and rear setups with them.
Why is it that racingbrake is not aware of this?
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      01-18-2013, 12:14 PM   #73
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Quote:
Originally Posted by Chriskm3 View Post
Why is it that racingbrake is not aware of this?
I can't tell you what RB management tells their employees. I have only worked with the owner and no one else. To say that RB is not aware of this is misleading.
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      01-18-2013, 01:14 PM   #74
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Do you represent racing brake ?
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      01-18-2013, 01:15 PM   #75
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Quote:
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Do you represent racing brake ?
No, just sell the products that we helped them engineer.
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      01-18-2013, 02:25 PM   #76
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Just had a comverstion with Alex from racing brake. I can't wait to get their product on my car. Good guys to deal with. I will be writing a review on their bbk kits
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      01-18-2013, 02:33 PM   #77
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Quote:
Originally Posted by Chriskm3 View Post
Just had a comverstion with Alex from racing brake. I can't wait to get their product on my car. Good guys to deal with. I will be writing a review on their bbk kits
Can't wait to hear it!
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      01-21-2013, 02:12 PM   #78
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Can't wait to hear it!
+1
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      01-21-2013, 04:59 PM   #79
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Glad to hear about another kit gettin installed! I already told them to sell me their first kit for the rear. It's going to get made one way or another...meaning I'll just have them custom make it for me worse case.
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      01-21-2013, 08:50 PM   #80
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I have RB rotors on my G37. Car stops on a dime... Threw in stoptech pads in the front and project mu's in the rear, and it's amazing. When I got corner balanced, I weighed 3690 w/ me in it (I'm like 170ish), so the cars not that light to begin with either.
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      01-21-2013, 10:05 PM   #81
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^ Yup, now my fully loaded E90 M3 out brakes my buddies '05 STI w/ hawk pads (think they are hps pads)
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      01-24-2013, 12:34 PM   #82
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Here is quick shot
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      01-24-2013, 12:38 PM   #83
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Here is quick shot
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      01-24-2013, 01:05 PM   #84
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Additionally r b is sending me colour matched paint for the rear calipers.

Last edited by Chriskm3; 01-24-2013 at 05:14 PM.
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      01-24-2013, 02:23 PM   #85
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^ Nice touch on the color match paint! Show us a pic when you get done with them, can't wait to c em.
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      01-25-2013, 11:00 PM   #86
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Here you go guys...
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      01-26-2013, 03:14 AM   #87
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Quote:
Originally Posted by 1MOREMOD View Post
yep i stand to save 16.4 lbs per corner going from vmrs-ad08s and stock brakes to apex ec7-nt01s and stoptech trophys. enough to get me under 3600 on a fully loaded e90. still a pig.
How much doesthe Apex EC7-nt01 weight?
Can you post the tire and rim size?
Thanks.
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      01-26-2013, 03:15 AM   #88
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Here is quick shot
Brakes look good. I heard the install was a piece of cake
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