This might not make any sense, but here goes.

When the fuel enter the cylinder on the Raptor how does it fill the cylinder? From left to right, from the center out, right to left, all at once and move across the cylinder....
(stage2 Hot Cam BTW)

Would there be any benefit to changing this? Say if it comes out of the center valve first and spreads towards the other two, would it be benefical to make it come out of the left valve first and move towards the other two? Sort of making a swirl in the cumbustion chamber?

 

Dodge tried something similar in the late 70s with their "lean burn" heads but it didn't last. The concept was to use less fuel but swirl it around the combustion chamber to prevent hot spots. The engines ran HOT and it was very hard on rod bearings, especially the 360 engines.

Chevy does it today with the benefit of knock sensors and EFI, it's called the Vortec series. Same concept, less fuel and more swirl to achieve even combustion.

Both companies invested a pile of R&D to lower fuel consumption but I never heard any real performance benefits. Personally, I'd be afraid of uneven combustion with a home grown solution.

 

Don't forget the Ford HSC engines (high swirl combustion).

 

Combustion chamber dynamics do a lot for how a motor runs. Swirl and even burning is not just for making a lean burn situation work but can allow (with normal mixture) higher compression without detonation, I believe. But on the Raptor, don't the cam lobes open more than one valve each lobe via a forked rocker arm? That would eliminate the opportunity for assymetrical valve timing.