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Rotors and efficiency

To: eric salem <eric@mail.brown911.com>, Mark Sirota
Subject: Rotors and efficiency
From: "eric salem" <eric@mail.brown911.com>
Date: Fri, 28 Jun 2002 12:25:47 -0500
Another way to look at it:

In an autox all we need are brakes that can predictably stop at the limit for 
70 second run. Thus for most cars cooling isn't an issue. My FP 911 has the 
smallest rotors and calipers Porsche ever put on a 911 and they work just fine 
rain or shine. But they do overheat in a 40 minute open track session. 

In a 30 minutes on an open track you need the same performance just for 30 
minutes so cooling becomes an issue. More air flow or bigger brakes or both.

In a 24-hour race it's just that much more important, so much more so that one 
company uses carbon fiber rotors that are almost as hard as diamonds and wear 
so little they use one set of rotors for an entire season of endurance racing.

Which leads back to my original point anybody with drilled or slotted rotors 
for an AutoX application isn't doing it to go faster.

e

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