I was thinking the converter needed to drop back more after shifts but the mfg told me that these days they don't focus much on drop back rpm. He said they have some very fast cars that run with very small drop backs after gear changes. Keeping the engine right at max power all the way down the track is what they are trying to do. So that makes sense, I guess the issue is having the converter slip enough to move the drop back point higher into the power band without having it slip too much. The stall point on the existing converter is only a few hundred RPM less than peak power.