In the Jennings book, reed from page 93 onward. Jennings also mentions the work of the yamaha engineers, and also, where the crankcase stuffing myth originated from.
Track demands, I guess so. Some tracks require lower rpm tuning that others, which prefer higher rpm due to how the straights, curves and climbs are configured.
Our model engines do not run on tracks, but have a propeller as very predictable load. So there is one varable we do not need to consider. Instead of adapting the engine to the prop, we can adapt the prop to the engine.