Slotted do have some level of benefit as mentioned on the first page of posting. The slots tend to help reduce the chance of glazing in a high stress braking situation.

I've given some links on the falisfied claims of cross-drilled rotors having any advantage. But there are thousands upon thousands more. Just search the internet.

Google is a powerful tool.

Try "brake myths" "cross drilled myths" "cross drilled performance" "cracking rotors"

Try various combinations. Theres far to many links of evidence and testing to link here. If need further evidence, start emailing brake companies. Stoptech, TCE, Powerslot, Willwood, Rota, etc.

Todd from TCE will tell you straight out that cross-drilled is just an aesthetic modification and has no place on the track...and he sells the damn things (and races as well).

Some racers will still use them, mainly for the unsprung weight loss, but will replace them after each race session. This mainly occurs in very lightweight vehicles or bikes.

Visit some race forums for additional info/evidence/reports after the google searches.

http://www.sccaforums.com
http://www.corner-carvers.com

 

Agreed. I said earlier that drilled street rotors are not for the track. I have cracked drilled rotors myself on the track, so I know.

However, they can actually reduce stopping distances in an emergency situation on the street.