Re: Cross drilled or slotter rotors? Opinions needed

[Bob <mx@snet.net>]

Pat Martin wrote:
> 
> I have cross drilled and after 40k miles, 2 turn downs, more track days than
> I can count, and recently installed Porterfield R compounds they just
> started to crack.  Not too shabby if you ask me (which you did not:-).
> Several other people I know also have them and none of them have cracks.
> YMMV.

Ive experimented a LOT with cross drilled, and have put them to some
pretty severe tests and have never ever had any problems ...including
cracking. Im guessing if you got some cheesy disk and drilled it you
would have problems, but Ive always started with quality stock.  Ill see
if I can dig up some of my old charts for temperature/time with stock
and cross drilled rotors, you would be amazed at the difference. When we
tested slotted, they did almost nothing for cooling. 


> 
> One more thing re:powerdiscs.  There is 1 bad thing I can say about them.
> They are BUT ugly.  IMNSHO.
> 

Gotta side with you on that one.