[IheartSTI]

I am not attempting to tune my own car although I do I have a couple questions about tuning to further my understanding of what my car is doing. I was just reading about ignition timing and I know you can advance/retard timing for better tune on race fuel...but how much? Would it depend on octane and o2 content in the fuel? If it were a cold day at the track would this also become a timing factor? I was hoping I could receive some feedback to help me better understand. Thank you