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      04-21-2008, 06:33 PM   #1
Kris
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Smile Anyone interested in a GB for the Performance Brake Rotors?

More the merrier... Getting some pricing now, looks like $100 USD per disc...

These are the slotted/drilled puppies as seen here:



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      04-21-2008, 07:00 PM   #2
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It does look good mate. Any idea what the size is? Is it actually better for track application? I know it is 3.1 pound a corner lighter, which is not bad given it is unsrpung weight. I am potentially interested...
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      04-21-2008, 07:04 PM   #3
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Size will be identical, because if theres a size change then the calipers would require new brackets.. Only difference is a lighter rotor and a better cooling rotor..

Theres a big diff in weight saving! Especially for you WAY who wants to make a CSL 135i :P
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      04-21-2008, 07:15 PM   #4
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How much is the shipping? Can Drew help us too?
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      04-21-2008, 07:17 PM   #5
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3.1 lbs savings per corner is the hotness!!!!!
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      04-21-2008, 07:18 PM   #6
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I've emailed a guy whos selling them, if Drew can help us that would be better.. Ill ask Drew
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      04-21-2008, 07:21 PM   #7
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It is BMW Performance Parts so I can't imagine why Drew won't be able to help...
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      04-21-2008, 07:55 PM   #8
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Thanks!
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      04-21-2008, 08:04 PM   #9
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Can any one explain why this rotors are so cheap. Are this rotors the same material as the original ones.
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      04-21-2008, 08:24 PM   #10
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Because they are the latest material ones, BMW now use plastic in their rotors to save weight and increase braking power.
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      04-21-2008, 09:30 PM   #11
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im interested..keep us posted drew..
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      04-21-2008, 09:47 PM   #12
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Help me out here... what are the benefits of these brakes? That is, what difference will I notice and does the 3.1lb. weight savings transalate into improved 1/4 mile times?
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      04-22-2008, 03:23 AM   #13
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In my experience drilled rotors are weaker and more prone to cracking. I've found the best option if you plan to track the car is to go for slotted only.

I wonder if these BMW performance rotors are really up for some track punishment or if they are really just for 'show'...
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      04-22-2008, 05:17 AM   #14
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spdrcr: you've never had a Porsche then

It depends on the method used to make them. Cast rotors with drill holes are perfectly fine, drilled rotors after making them are prone to issues like cracking..

That said, you'd have to be doing some real thrashing to crack a good set of BMW rotors. The M3 has them and various other M cars all with much success

If only for the weight saving, these are fantastic. 3.1lb per corner is BIG
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      04-22-2008, 05:32 AM   #15
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Fair enough Kris. If you can save 3.1lb / corner with these it would be interesting to see how much you could save with a two-piece setup...
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      04-22-2008, 05:56 AM   #16
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Jeff, alot more. Alum rotor hats and drilled discs is better again.. these rotors look semi-two piece, not sure if you can see the studs?

This, combined with a light weight wheel setup would be great!
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      04-22-2008, 06:02 AM   #17
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These are just too cheap to be true...there must be a catch? Do I need to replace them after every track day? Are they really thin?????
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      04-22-2008, 07:13 AM   #18
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Kris, what is the temperature range for this rotor? I need something about 600 degrees for track usage...
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      04-22-2008, 07:40 AM   #19
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I can't imagine they'd serve any purpose on the 125i would they?
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      04-22-2008, 07:45 AM   #20
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Incredible pricing.:iono:
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      04-22-2008, 08:24 AM   #21
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Quote:
Originally Posted by WAY View Post
These are just too cheap to be true...there must be a catch? Do I need to replace them after every track day? Are they really thin?????
+1

I dont want to be negative but there most be somthing with this rotors.....
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      04-22-2008, 05:06 PM   #22
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WAY, I highly doubt it will suit heavy track abuse like what you're talking about. You're best with a proper 2 piece, lightwheel setup from someone like AP, Wilwood or Porsche.
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