[akdg87]

it really depends on the gasoline you have availabile and how effective your intercooler is. We have 90 octane at the pump here in alaska, i also supplement that with methanol injection using a devils own kit.

This is a nice visual that matt from sloppy mechanics put out. He might be the most well versed LS tuner out there for stock PCM's. He has put alot of good info out and backs it up with explanations.