RT615s are NOT for the track.. they overheat and wear out much too quickly.
As for my street/auto-x setup,
I have KTS 8/6 coilovers on a S13.
Stock front bar, removed rear bar.
225 front, 235 rear Bridgestone Potenza Tires (going to rt-615s soon)
S15 HLSD
Front camber: -4.0 degrees
Rear camber: -1.5 degrees (could use a little more)
It feels pretty good as is.. fairly neutral handling. Very sharp turn-in, even tread wear front/rear.
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