Curious what your initial timing was? The numbers don't sound too off theoretically (I'm building one right now as well), but 8 psi at 9:1 your FCR would be close to 14. Not sure what 93 octane is good to but I've always been told to stay under 12. I don't have any experience to share but definetly trying to learn so I don't end up in the same boat.
