Recently found your Youtube post from 2012... Had to create an account here just because I wanted to ask a few things... I'm wondering what fuel you are using at that comp ratio. I can only get 91 octane up here, and am looking at building something very similar to what you have, but I need it to run on 91.... Any suggestions? this is my first high compression engine build, everything else I've done has been bored out, new bearings/rings/seals, and back together kind of thing... Thank you for anything you are willing to provide. Cheers, Brian