I'm ASSuming you are using a trans brake. If so, you can move the launch RPM up and down to see if the tire wants more hit or less hit.

I'm in the converter/IC/shock setting/launch RPM boat.

I suspect there is something in all those areas. It's almost like you aren't hitting the tire hard enough. Most guys move the IC up and back to increase the hit, but I'd rather do it with converter or shock settings.

For me, chassis tuning was always much easier if I had the IC out longer and lower than most. I could hit the tire a bunch harder with the engine/clutch that way.