What would it take to make 1.44 lbs-ft per cid ?

Mean416 said
I started this post by writing: "To me, airflow obviously affects power and torque. I don't think it's OBVIOUS that velocity - in and of itself - does."

Velocity is the speed of the air mass without speed (movement) you got no air flow.

Mean416 said
Tuned runner length that is matched to the torque peak will make a huge difference in torque produced.

The runner is part of the port it's size and shape is gonna aid in velocity and the mass of air, a 360 gonna need about 600-800 cc of air for each power stroke and got less than a millisecond to do it.

The runner length is gonna give extra assistance at certain rpms every runner is technically tuned for a certain rpm ranges. It might not be the ranges you want.

Mean416 said
I'll finish the post by saying...I thought about the velocity thing more. Velocity and momentum are tied together. The faster a ball is moving, the harder it is to bring it to a stop. Same with air. So if average flow velocity is higher in a runner, it will tend to cram into the cylinder more effectively especially at the end of the intake stroke/beginning of the compression stroke.

Yes, momentum is velocity x mass.

Also if velocity is too slow reversion is easier and get less filling for the first bit compression stroke and less filling overall. Higher velocity can fill the cylinder quicker and easier needing less cam duration and overlap but too much velocity and the port chokes. Like everything in life it's about finding the right balance.

But if you look at the chart mid velocities seem like the Ideal, I'm guessing cause an engine has to operate over a fairly wide range of rpms and those mid velocities which dictates port size for a given cfm probably gives the best overall powerband.