Cool carbon brake pad color

yandy · 12-17-2011, 11:12 AM

Just wondering if this color is normal for the cool carbons after a few hard laps, hard breaking?

Edit: correct picture link

pixelblue · 12-17-2011, 12:08 PM

It's called pad transfer layer. As long as you got an even layer you're good. You're supposed to get that for maximum braking ability

yandy · 12-17-2011, 12:26 PM

Quote:

Originally Posted by pixelblue

It's called pad transfer layer. As long as you got an even layer you're good. You're supposed to get that for maximum braking ability

Sounds good to me; they def work.

Thanks

Focusedintntions · 12-18-2011, 10:07 AM

I've always heard that when it turns white and powdery it means that you're over heating the pad material's working limits

kevin @ eas · 12-21-2011, 11:51 AM

Rotor has a nice color showing good material transfer; the edges of the pads appear to show discoloration from paint burn off.

Cool Carbon pads are good to temperatures of 600C+; With the enclosed design of the 135i brake calipers it is a good idea to consider the addition of cooling ducts; the stainless steel noise shims block heat transfer roughly 3x better than steel shims; Titanium is better with a 5x blocking of heat transfer.

yandy · 12-21-2011, 12:04 PM

Quote:

Originally Posted by kevin @ eas

Rotor has a nice color showing good material transfer; the edges of the pads appear to show discoloration from paint burn off.

Cool Carbon pads are good to temperatures of 600C+; With the enclosed design of the 135i brake calipers it is a good idea to consider the addition of cooling ducts; the stainless steel noise shims block heat transfer roughly 3x better than steel shims; Titanium is better with a 5x blocking of heat transfer.

They were probably around there during hot runs, when I got into the pits they had gone down to about 750F. Titanium Shims and slotted EBC rotors are in the pipeline as well.

Are there any brake ducts for the 135? Other than the built in one's that is?

You start tracking your car, and so many things to do.. lol but fun!

Focusedintntions · 12-21-2011, 01:55 PM

No kits....it's dyi really

robert @ eas · 12-21-2011, 02:40 PM

Quote:

Originally Posted by yandyr

They were probably around there during hot runs, when I got into the pits they had gone down to about 750F. Titanium Shims and slotted EBC rotors are in the pipeline as well.

Are there any brake ducts for the 135? Other than the built in one's that is?

You start tracking your car, and so many things to do.. lol but fun!

For cooling ducts check the forums for what others have fabricated;
unfortunately there is currently no kit offered.

12-17-2011, 11:12 AM	#1
yandy Lieutenant Colonel 108 Rep 1,973 Posts Drives: 2009 e92 MR "Civic" ///M3 Join Date: Feb 2009 Location: Miami, FL iTrader: (3) Garage List 2009 BMW M3 [0.00]	Cool carbon brake pad color - after heating up? Just wondering if this color is normal for the cool carbons after a few hard laps, hard breaking? Edit: correct picture link __________________ \|\| DCT \| ESS Tune \| ACM Test-pipes \| AA Green Filter \| Swift Spec-R Springs \| Stoptech ST-40 F \|\| \|\| My Youtube Channel \|\| Last edited by yandy; 12-17-2011 at 11:17 AM..
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12-17-2011, 12:08 PM	#2
pixelblue Colonel 140 Rep 2,234 Posts Drives: the silver bullet Join Date: Feb 2010 Location: northern virginia iTrader: (2) Garage List 2010 135i [8.90]	It's called pad transfer layer. As long as you got an even layer you're good. You're supposed to get that for maximum braking ability __________________ "I would quote everything pixelblue said, but you've already read it. Take it from someone who's put the 1 through its paces"
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12-18-2011, 10:07 AM	#4
Focusedintntions Colonel 105 Rep 2,696 Posts Drives: 2011 135i M-Sport :D Join Date: Nov 2010 Location: NoVA iTrader: (1)	I've always heard that when it turns white and powdery it means that you're over heating the pad material's working limits __________________ Faster, faster, faster, until the thrill of speed overcomes the fear of death… – Hunter Thompson
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12-21-2011, 11:51 AM	#5
kevin @ eas General 2906 Rep 21,703 Posts Drives: 2015 BMW M4 Join Date: Nov 2011 Location: Anaheim iTrader: (22)	Rotor has a nice color showing good material transfer; the edges of the pads appear to show discoloration from paint burn off. Cool Carbon pads are good to temperatures of 600C+; With the enclosed design of the 135i brake calipers it is a good idea to consider the addition of cooling ducts; the stainless steel noise shims block heat transfer roughly 3x better than steel shims; Titanium is better with a 5x blocking of heat transfer. __________________ Kevin S. \| european auto source (eas) email: kevin@europeanautosource.com · web: https://europeanautosource.com· tel 866.669.0705 · ca: 714.369.8524 x31 GET DAILY UPDATES ON OUR BLOG · FACEBOOK · YOUTUBE · FLICKR · INSTAGRAM
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12-21-2011, 01:55 PM	#7
Focusedintntions Colonel 105 Rep 2,696 Posts Drives: 2011 135i M-Sport :D Join Date: Nov 2010 Location: NoVA iTrader: (1)	No kits....it's dyi really __________________ Faster, faster, faster, until the thrill of speed overcomes the fear of death… – Hunter Thompson
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