It really depends on power level.

We have Competition Engineering 3 way and they work great at 90/10 for the 11.0 to 11.50 range. Extend quickly, get the front up and keep it there.

As we got faster than 11.0-ish, and deep into the 10's, the front would rise TOO quickly, wheelie a little and then come down too fast causing the rear to unload.

I have them at the 70/30 setting for the faster times and that seems to work better by slowing the extension. I updated the rears to Viking Crusaders but really need fronts and the Calvert rear/CE front combo seems to be getting the job done for now...