[naz]

meford4u,Oct 16 2007, 10:44 PM Wrote:even if you bed in your brakes correctly............

Explain how to do this and what it means please.
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these guys can explain it better than i ever could
theory:
http://www.stoptech.com/tech_info/wp_bedintheory.shtml
procedure:
http://www.stoptech.com/tech_info/wp_bedinstock.shtml

cliff notes:

"the objective of the bed-in process is to deposit an even layer of brake pad material, or transfer layer "

the actual process of bedding in street brake pads is to do 10-15 stops at about 90% of the braking effort needed to engage ABS in the dry or lock up the tires. that's it. nothing to it

what it means takes longer to cliff notes

when the pads are hot they are in 'adherent friction' mode (eats pad) when they are cold they are in 'abrasive friction' mode (eats rotors). in adherent friction a layer of pad material is deposited. at first it is deposited on the rotor, and then after the transfer layer is the surface that contacts the pad. if there is any unevenness in the transfer layer you will feel that as 'shimmy' or 'shudder' in the brake pedal or steering wheel. almost all of the time when people say a 'rotor is warped' really what they should be saying is 'there are uneven pad deposits causing vibration'

so if brake pads are not bed in correctly and you take it to the track and start hammering on the brakes you might get an uneven deposits (instead of a controlled initial depositing that you would get if you intentionally bed in the brakes)

or if you over heat street pads the material will come off in chunks (i got a little bit of this too) and you will actually see the imprint of the pad on the rotor. either way.. same thing.. you will get brake shudder

that whole abrasive vs adhesive friction thing on the stoptech site is the main reason why i think street performance pads don't seem like that good of a deal. you have to trade off rotor wear and low temp stopping to get the high temp resistance from chunking.. so when ppl say hawk blues aren't good for the street it is because they will be portable lathes that chew up your rotors all the time because they would never get hot from street use to become adherent

i sort of semi rambled there your best bet is probably to read the stop tech site =)