drilled rotors and cooling

[Joe Martin Cantrell <agiyo@domain.elided>]

Far be it from me to contradict (and I'm not) our esteemed Mr. Welty, but I 
have some recent research from the Institute of Empirical Blunders.

Last weekend's AROO track day was the first at-speed test of my drilled 
rotors.  I bought them a couple of years ago, before I read that you need 
slots to cool brakes and drilling in itself does not help cooling.

I brake into the turns very late, and had problems with fade, incrementally 
alleviated by fitting AXXIS semi-metallic pads and 600F degree brake 
fluid.  The situation had gone from virtually no brakes after the second 
session of the day, to "I wish these were a lot better, but I'll probably 
make it or spin."

The rotors I fitted were stock, drilled by a local machine shop.  They make 
a katydid buzz when I put them on, but I ran seven sessions with very 
little fade.  They are a very definite improvement; I leave it to you to 
surmise why.

YMWV,
Joe
'72 PIR Slut which showed me 132 mph (optimistically [MMDV] indicated), 
yesterday.  As I glanced back in the cockpit after spotting the white car 
roof with the lights, on top of the next hill.  And made it 
through.  Thanks be to St. Giulietta.
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