318 MAX fuel economy builds?

Fuel vapors don't explode. Detonation is the liquid droplets exploding. Vaporizing the fuel is like adding octane, but without the slower flame speed. In fact, better vaporizing the fuel and mixing it better with the air will require less ignition timing advance. David Vizard has a video on his channel where he talks about this (as applicable to a British 1974 Chrysler Avenger).