the reason your full race cam is a dog at lower rpm is because your power (compression) is escaping thru the intake port. As rpm builds and intake velocity increases your no longer losing that power (compression) because the higher velocity intake flow is keeping the fuel from escaping thru the intake port. You are correct about many things here, but skirting around the fact that cylinder pressures are changing based on rpm and cam duration. the other fact you completely avoided is the cylinder head ports and valves. smaller valves and smaller ports are going to help hold more air in the cylinder at lower rpm and restrict airflow at high rpm. so for the same reason the full race cam engine is a dog at low rpm so also is the bigger valves and larger smoother ported heads a dog at lower rpm. we have to first decide WHERE in the rpm range we want to make the most of our power and shape the cam duration, valve size, and port design to get that power.
