That's awesome! I'm in SoCal as well (LA). I'd recommend the full E85, it's my personal fav out of mixing or what not. It runs better & smells better
Also, my car on the stock turbo may or may not be faster than the G80 M3 comp from 2nd gear roll to the end of 4th. I think my lead would've kept gaining imo if it went past that.
I'll leave that up to everyone's imagination haha but it wasn't a walk in the park. I'd say 1-2 cars lead for the M2. I do have some magic sauce with my shifting as well. My tuner can vouch for that