No manual with it. Would like to know where I can run this. Did a search and -1 seems to be the norm. Where does it need to be set for 87 octane? I have no problem runnin premium pump either, but wanna be safe. What conditions require the higher advance settings? Is there much difference a couple clicks up with race gas? Runnin aggressive trail. I changed the clutching on it and runnin a orange white spring with the green secondary. 53 weights and a 57/51 helix. Stock gearing-19/40. Thanx in advance!