318 MAX fuel economy builds?

Dmopower said
IMO, exhaust heat is just not consistent enough to use to aid in vaporization. Coolant (heated coolant) would be much more consistent, although you wouldn’t get much help from it on cold starts until the engine temp came up.

Why not both?

I suppose you could use both (and someone probably did) but at some point you get the fuel vaporized too soon and that hurts power.

You have to find a balance between vaporization and what your booster delivers verses power output.