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<MISC>RE: Slotted vs. Drilled -- Recommendations?

     From: ghaines@domain.elided (Gordon Haines) Date: Thu, 18 Jul 1996 12:20:27 
     -0600
     Subject: Slotted vs. Drilled -- Recommendations?
     
     Does anyone have direct experience with slotted vs. drilled rotors 
     and/or recommendations on such?  Thanks in advace.
     
     Gordon
     
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     I know a guy who ran cross-drilled (radially vented) front rotors on a 
     hopped-up VW.  On the track the heat proved to be too much and they 
     cracked.  I have heard of other instances of this occurring, on cars 
     ranging from VW's and BMW's to Audi's and Porsche's.
     
     My brother has a mean Scirocco with SLOTTED front (radially vented) 
     rotors and cross-drilled (solid) rear rotors. Metal-masters fr&rr. 
     This thing is light and fast, and will out-brake any street car that I 
     know of - it feels like the skin on your face is about to peel off !!
     
     Anyway, he claims a marked improvement in braking with the slotted vs. 
     unslotted fronts, and a large decrease in rotor/pad wear. He slotted 
     them himself. The rears, solid cross-drilled, did not make as big of 
     an improvement. His car sees/has seen a lot of track time.
     
     I plan to slot the next set of front rotors on my car. I'll post the 
     findings when I subject the setup to several track events.
     
     Bob T
     '90 M3