[Ed Wright]

Those "heads up" cars and "10.5 shoot out " cars use very soft-hit converters. I learned that while working with some of those guys. Put one of out ATI SS converters in, and they wouldn't touch the ground.
Most of them seem to think they have such wonderful working cars because they have a big block on nitrous carrying the tires on marginal tracks with smaller tires.
I have talked to enough of them (some of the locals used to use my chassis dyno) about car set ups, they have nothing special at all. I talked to ATI, and another converter mfgr about it. Both told me "We don't sell those kind of cars converters like you guys run, they would never hook them. Yours hit much harder."
Ditto bracket cars. They need to be consistent on marginal tracks. They don't need to be really fast.