318 MAX fuel economy builds?

Hysteric said
Both Larry Widmer and Bruce Robertson stated that they have managed to run 21-1 compression ratios In engines and Bruce said he'd managed to do it with pump fuel.

What issue were they fixing to be able to do that?

Im talking about the quote YOU posted and what Bruce was discussing.

As you love to do, you extrapolate things together so you can claim how smart you are.

Stay on topic for once.