Brake Myths
Here's an article I ran across this morning dispelling a few popular brake myths and common beliefs. The author does a pretty good job explaining how things work in the real world. Link
Forum Discussion
That author also has some that should be debunked...
As long as there are binders in friction material...there will be out gassing.
That out gassing is a desired 'feature' of friction material, but it needs to be
done correctly. As friction material on friction material is the goal....but if
you stop while the friction material is out gassing...it will bake a high spot
and why some will say no such thing as a warped rotor...just high spots that cause
the jitter when the pads comes across those high spots
Finally...folks (some) are seeing the issue with drilled (cast in is just okay)
Not many know that drilling (even cast in) holes removes mass and mass is one
key component in heat rejection management
Slots do aid in managing out gassing and is not really to wipe the surface of
the friction material.
That 'glaze' is the out gassed material redepositing on the friction material
that out gassed and on the cast iron.
with ALU Oxide to remove glaze...it will leave particles that will then sand paper
your friction material. Use EMERY CLOTH or Scotch Bright (2nd best)
That guys image of a high spot is from the StopTech site and still amazes me
that so many don't believe that a 0.0001" high spot can cause the steering wheel
to jidder as if warped rotor
As long as there are binders in friction material...there will be out gassing.
That out gassing is a desired 'feature' of friction material, but it needs to be
done correctly. As friction material on friction material is the goal....but if
you stop while the friction material is out gassing...it will bake a high spot
and why some will say no such thing as a warped rotor...just high spots that cause
the jitter when the pads comes across those high spots
Finally...folks (some) are seeing the issue with drilled (cast in is just okay)
Not many know that drilling (even cast in) holes removes mass and mass is one
key component in heat rejection management
Slots do aid in managing out gassing and is not really to wipe the surface of
the friction material.
That 'glaze' is the out gassed material redepositing on the friction material
that out gassed and on the cast iron.
DO NOT
use sandpaperwith ALU Oxide to remove glaze...it will leave particles that will then sand paper
your friction material. Use EMERY CLOTH or Scotch Bright (2nd best)
That guys image of a high spot is from the StopTech site and still amazes me
that so many don't believe that a 0.0001" high spot can cause the steering wheel
to jidder as if warped rotor
