Pagids?

[Larry C Leung]

Cryo rotors are harder and more heat resistant than ordinary cast iron.
More resistant to warping too. The re-crystallized metal will absorb more
heat before changing (i.e. blueing). However, if you are bluing rotors,
you have a more fundemental problem, you are overheating the brakes. Race
pads will help to a degree, fresh fluid will help, and the cryo treated
rotors will help somewhat, but the harder you drive, the more likely you
will eventually start fluid boiling, not enough heat is being removed
from the system. As Taka suggests, try, in order from least to most
expensive:

Ducting, or water cooling
More open wheels
Larger rotors and matching calipers

This is discussed pretty well in one of this years Grassroots Motorsports
mags issues (check archives, don't have easy access to this article, but
discussed it when Alex Van Gerbig was discussing larger brakes). 

HTH,

LL - NY




 Aug 2001 18:22:23 -0400 "TM" <t44tq at mindspring.com> writes:
> Tess,
> The Pagid Blacks are more or less a street compound- the Orange
> are a real race pad.
> 
> I don't see how a cryogenically treated rotor would prevent 
> blueing-
> that's due to heat buildup that a cryo'd piece would have no effect
> on, other than possibly reducing warping.
> 
> I would rather invest in brake ducting and larger brakes. The 
> greater
> mass allows for more of a heat sink before they cook.
> 
> Taka
> 
> -----Original Message-----
> From: quattro-admin at audifans.com 
> [mailto:quattro-admin at audifans.com]On
> Behalf Of Tessie McMillan
> Sent: Thursday, August 16, 2001 5:58 PM
> To: quattro at audifans.com
> Subject: Pagids?
> 
> 
> I just picked up the Quatt from my mechanic. At the last moment, I 
> decided
> to replace the pads (I'm running Pagids) before Saturday's track 
> event.
> Good thing I did!
> 
> Three of my pads were cracked; one (I can guess which wheel it's 
> from,
> although he didn't keep track) is even cracked in multiple places! 
> Heck,
> I've only done three track events on these babies! My mechanic says 
> I'm
> also starting to cook the rotors, ATE PowerDiscs, as they are 
> turning
> blue. He wants me to upgrade to a cryogenically treated rotor and to 
> use
> the Pagid orange racing pad.
> 
> Qs: what's the difference between the Pagid black and Pagid orange? 
> I
> thought I was already using a cool compound pad. Do any of you have
> experience with cryogenically treated rotors? What about on 
> cross-drilled
> rotors -- do you get cracks?
> 
> Thanks!
> 
> Tess
> in Seattle, WA USA still braking *very* gingerly...
> 
> 
>