91 octeane gas sucks, I know. I am still getting a bit of light pinging at full throttle high loading spots on my fuel and ignition maps. Just wondering if there are any guys in cali running 11.5:1 or high CR on the awesome state of California's 91 octane. If so, what AFRs are you running at WOT? and how much advance on your ignition? I'm just trying to get it in the ballpark to where it stops the little rattlecan action. It's not superbad knock, but I am avoiding it like the plague right now, staying off the throttle as much as I can convince myself to do inorder to keep it safe. I am running around 13-13.5 afrs when on the throttle, and near stoic of throttle or at cruise, and that seems to be doing fine for the most part. I want my WOT back though!