The "lower rpm launch with a light base pressure clutch plate and moderate counterweight" to make the radials launch is a compromise that you don't have to make. There's also the fact that a SoftLoc style launch setup still hits too hard for radials after a WOT shift. Just look at the graphs, there's wheelspeed after the shifts that radials won't tolerate.

The ClutchTamer allows you to launch much higher with zero wheelspin, all while losing less than 1500rpm. Basically you can have a dead hooked hi rpm launch without ever dipping below your torque peak. Some don't even use a 2-step, they launch right off a single stage rev limiter and still dead hook. The ClutchTamer can also get you that slip after the shift that radials require, just bounce the pedal off the stop when shifting. This also improves recovery after the shift by 3-500 rpm, allowing you to use a diaphragm PP and still get shift recovery benefits similar to an adjustable SoftLoc setup but without that post-shift initial wheelspin. A 500 rpm improvement in recovery can mean an extra 40hp from the engine for a few tenths of a second after a shift. It's not unusual for a car to end up quicker overall using the clutch pedal vs clutchless shifts when using the ClutchTamer, even if using bias slicks.

Grant