A stick car hits the tire harder as a torque convertor offers some amount of "cushion" to the hit. The design of a radial with it's wrapped plies offer a spring motion when compressed excessively. So when you hit the radial, it recoils, bounces and then the slick never recovers. A bias slick gets hit and doesn't coil back, it stays planted.
Or so the theory goes....
Possible cures for this problem are stiffer shock settings, softer clutch settings and lower launch RPM's. The problem here is lower launch RPM's typically require stiffer clutch settings (base pressure). So two of the possible cures contridict one another. Another avenue to test might be bead-locks. That increases sidewall stiffness and may slow the spring motion. That's just a theory I have, don't know, haven't done any testing with radials. There is also a definite weight penalty here.
My best guess as I write this is extremely stiff extension settings using a KONI controller to soften the extentsion in gradual increments; measured in milli-seconds. Way beyond my level of application and proper testing!
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