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Suspension & Braking Forum by BimmerWorld
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!
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Old 03-19-2013, 09:25 AM   #21
WDE46
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Quote:
Originally Posted by Phattcatt View Post
Key to remember is quality parts but !!!! Brake fad is why drilled and slotted rotors were created. I'm a mechanic and we have been doing some researching the subject. Most think it is heat alone that causes fad but it is heat that creates what is called " gassing" this forms between the friction materials ( pads and rotors ) and it is this gassing that greatly reduces the co-efficient of friction. Drilling and/or slotting of the rotors dissipates this gassing greatly improving hard repetitive braking! Before disks drum brakes had the expanding drum and gassing together to create the most fad in braking. Although surface area is important it is a minimal loss of surface area compared to the efficiency created. Although most driver I see don't drive hard enough to ever notice much difference, and only think they look cool like the bright red callipers! Yuk!
Lol hope this helps people out when I burn thru my brakes I will be looking for some quality rotor kits. Drilled and slotted of course!
Street pads produce a negligible amount of gas these days. Race pads are another story since they are designed to operate hot. Slotted rotors definitely help with race pads.
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Old 03-19-2013, 04:12 PM   #22
Phattcatt
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I am curious Why street pads suffer from fade then?
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Old 03-19-2013, 04:15 PM   #23
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I agree that premium pads should be used with drilled / slotted rotors
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