I just read a really good article on timing, I'll see if I can dig it up. Basically it's not good strategy to advance timing till you knock and back it a couple degrees. That was my initial noob thoughts, but the article made me rethink this. Honestly, unless you have a rel sensitive ass, putting it on a dyno is the only sure fire way of eeking the most out of it. Especially on E85 since it seems to have such a wider safe margin than 93.