Is More Flow Better, Is The Smallest Intake Port That Flows The Most The Best

Answer: combustion (a force)

What moves a car?
Answer: combustion (a force)

What causes acceleration?
Answer: a force

Is horsepower a force?
Answer: No. It is a measurement of how often a force is applied

So horsepower doesn't move the car?
Answer: No. The force (torque) moves the car. The force is continuously applied to increase acceleration of the mass (car), but it is the force (combustion) that produces the acceleration.