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M5 Front Brakes

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Old 12-27-2006, 08:34 AM
  #21  
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great job, looks
Old 12-27-2006, 09:37 AM
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Congrats, great job
Old 12-27-2006, 09:45 AM
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Originally Posted by nicke60gre' post='371367
Thanks, but my 21 years + as an Aviation Support Equipment Technician in the US Navy background told me to break out the owners manual - p 181 , it says to use DOT 4 brake fluid.
I'll do a research on DOT 5's application though .
DOT 4 is ether-based, so it's hygroscopic (it absorbs humidity), but it's practically uncompressible. Therefore it requires regular replacement (every 12-18 months), but it provides excellent braking feel. DOT 5 is silicone-based, and it's non-hygroscopic, but slightly compressible. It's a "safer" choice, but it does not work as well. Clearly, in an M5 (even if it's only the brakes) you want DOT 4. Quote from the article referred to below: "We won?t even discuss DOT 5 fluids as they are completely unacceptable to the high-performance [braking] enthusiast"

For more details on braking fluid, see here
Old 12-27-2006, 10:26 AM
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Originally Posted by dlevi67' post='371504' date='Dec 27 2006, 10:45 AM
DOT 4 is ether-based, so it's hygroscopic (it absorbs humidity), but it's practically uncompressible. Therefore it requires regular replacement (every 12-18 months), but it provides excellent braking feel. DOT 5 is silicone-based, and it's non-hygroscopic, but slightly compressible. It's a "safer" choice, but it does not work as well. Clearly, in an M5 (even if it's only the brakes) you want DOT 4. Quote from the article referred to below: "We won?t even discuss DOT 5 fluids as they are completely unacceptable to the high-performance [braking] enthusiast"

For more details on braking fluid, see here
Thanks, great reading, very informative. I should've bled the rear wheels also. I'll replace the fluid when I change to stainless steel lines .
Old 12-27-2006, 02:39 PM
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Originally Posted by Rizbel' post='371517' date='Dec 27 2006, 02:26 PM
Thanks, great reading, very informative. I should've bled the rear wheels also. I'll replace the fluid when I change to stainless steel lines .
you are a brave man,
look awsome,i like that,

that will be my new project,any news to rear brakes?


bravo again
Old 12-27-2006, 04:26 PM
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Originally Posted by vl20sas' post='371595' date='Dec 27 2006, 03:39 PM
you are a brave man,
look awsome,i like that,

that will be my new project,any news to rear brakes?
bravo again
Thanks man. The front brakes do most of the job of stopping the car so I'll leave the rear brakes stock, for now.
Soon, maybe I'll replace them with those cross drilled rotors similar to the front rotors.
Tomorrow I'll paint all 4 calipers red . And bleed the rear brakes since I'll be working on them anyway .
Old 12-27-2006, 06:33 PM
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Originally Posted by Rizbel' post='371625' date='Dec 27 2006, 08:26 PM
Thanks man. The front brakes do most of the job of stopping the car so I'll leave the rear brakes stock, for now.
Soon, maybe I'll replace them with those cross drilled rotors similar to the front rotors.
Tomorrow I'll paint all 4 calipers red . And bleed the rear brakes since I'll be working on them anyway .

Yes red! I cant wait to see them!
Old 12-27-2006, 08:10 PM
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Don't forget BMW sticker on red caliper!
Old 12-27-2006, 08:23 PM
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nice job
Old 12-28-2006, 12:22 AM
  #30  
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Originally Posted by BlaSTiWi' post='371457' date='Dec 27 2006, 08:52 AM
That's what I heard too, but some said it seems to be a bit hard on the rubber brake lines so mostly they recommend a good pair w/ the stainless-steel braided brake lines, that will probably improve brake pedal feedback feel too.
This is true. I will be ordering stainless steel reinforced teflon hoses. They don't expand under pressure thus providing firmer positive feel on braking.

To answer some questions, these are all that I used for the M5 retrofit:
M5 Front Brakes-m5brakes1.jpgM5 Front Brakes-m5brakes2.jpg
M5 Front Brakes-m5brakes3.jpg M5 Front Brakes-m5brakes4.jpg
2 Front Rotors
2 Calipers with Brake Pads

PM quad_m for availability/pricing if interested .


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