cliff notes:
1. i know some people have great results running zero split, 15* split, and hell, even negative split.
2. nate is running 15* of split in the midrange, probably where he's making peak torque.
3. 730whp12a just posted what we all already know -- run 10* of advance
4. so, run ~10* advance, 10* split, get your intercooler and carb setup nicely, and have fun tuning.
(and don't run more than 10 psi on 93 octane gasoline with those 9.4:1 rotors!)