Re: misconceptions on drilled rotors and SS lines etc

[Richard Welty <rwelty@domain.elided>]

At 08:07 AM 3/18/99 +0000, jonathan coates wrote:
>The idea of drilling holes through the disc to release the "fumes" from
>the pad as it vapourises due to being heated mercilessly is a tempting
>thought, however if the pad is giving off these gases, isn't the
>opposite pad doing the same, in the other direction, down the same hole?

yes, but it's transient, because the holes will be uncovered naturally as
the wheel continues to turn. if the holes aren't uncovered by this motion
then you have "larger issues" to deal with.

>Does the drilling increase turbulence of the air round the disc, and
>thus cooling?

i've never heard anyone suggest this before.

>Do the brake people promote drilled discs to "cheese grater" the pads
>away so people buy more?

it's kool, and some well known race cars have it, and there is a smidgen of
a reason why, so it gets promoted.

richard

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