You say you found a 360? :D
I just about made up my mind that everything needs to run on 93 octane. No matter the compression ratio. The gas we get now days sucks.... sucks really bad. Talked to a self employed mechanic who has been doing mechanic work for like 50 years. He said he runs 93 in every engine he has... even his lawnmower and weed eater. My dodge ram likes the 93 better than the 87. However my Triumph Rocket III Roadster doesn't like 93 but likes 87... strange. I think the compression of the bike is 8.5. I do remember it is in the 8s. I'm sure there are other factors involved.