My ethos are lighter than stock LSS, but with ra1's, the setup is a bit heavier versus the lss on dz 101 tires. My average lap time improved by 6-7 seconds by getting ra1's. and I can still drive to the track.
I regularly am in the 1.3+ g range, but it gets more squirrelly at 1.36+ G.
Badly managed weight distribution... The car gives out at 1.2 ish G, properly managed the car very predictable above 1.3 g. With better suspension, lower ride height for more neg camber, I imagine what potential is left in my car.
Keith Verges ran 15/17 205/235 ra1, but the tire height was a bit shorter than optimal. With that setup, and the fact that he is a racer, he is 1-2 seconds faster per lap.