I think I remember a conversation detailing that anything above 22* WOT is useless. But I read that like... six months ago. In the meantime, I've been rather enjoyed by my beer. So, make of that what you will.
"I ran up to 22*is timing on my old setup, never ran any better than when the timing was 20*. So I backed it back down to 20 and called it a day." - Reptile