318 MAX fuel economy builds?

Rat Bastid said

Why not go in between? For what you are doing you have picked both extremes.

You can run 10:1 (I would) but unless you do EVERYTHING to make sure it works I’d be between 9-9.2:1 for what you want.

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Right right and that's fine. I was just curious if you are trying to oush the limits of maximum fuel efficiency is if you need to push the limits for compression too. I was already thinking about the 9:1 because I know that's the comfy area that most factories ran but didn't know if pushing it or lowering was better