Cams choice, Low CR vs VE%

You need to work at extracting more energy from what you're currently using. Did you read that link i posted?

Here's some of what Shrinker wrote:

It is important to understand that analyzing individual factors is one thing, but seeing how they form an overall result is another. I can’t assemble all the factors into one simple document but I will layout some basic thoughts for people to follow or expand upon.
1. Increasing the time of fuel engagement within the engine induction system increases vaporization. Injector placement, carburetor placement.
2. Decreasing fuel droplet size improves vaporization. Injector design, carburetor design, port flows, turbulence.
3. Increasing the volume of hot exhaust gas present during the intake stroke increases vaporization. Exhaust closing time, backpressure, and compression ratio.
4. Closing the intake valve earlier increases the time available for compression energy. Compression is broken up into adiabatic and isothermal times. Piston speed.
5. Increasing vacuum increases vaporization. Volumetric efficiency, throttling.
6. Increasing vaporization reduces the charge temperature.
7. Increasing vaporization (up to a point) reduces detonation.

Basically the way that you input energy to the fuel prior to ignition determines the combustion efficiency of a particular chamber.
Note I didn’t mention squish, as squish has no effect upon vaporization; it only affects combustion speed due to turbulence.