Yeah, good info. I went to a Gibb's seminar put on by Lake Speed Jr. a while back. It was very informative, and we all got some bonus info. He was inclined to answer just about any question, and we did get specific knowing that he is deep in the Cup scene.
Tom's posts here are required reading, and also SAE's Lubrication Handbook is good too. Tom turned me onto it.
Oiling systems are something that fascinate me. I have an engine builder buddy that attended the ADRL race last weekend here in Houston. Those cars don't have a minimum weight, they weight what they weigh. Everyone tries to get as light as possible, so some of them have reverted back to wet sump oiling systems because they weigh less than a dry sump system. The cars only go 1/8 mile, so the engine never pumps the pan dry. 0 weight oil, so it drains back to the pan quickly.