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

273 said
Further ahead than I was before, think I got a few bits of good info to build on.

Air flow and it's speed (velocity) obviously plays a big role. But if you look at the acceptable velocities
It does cover a wide range 240-320 fps, If you calculate that out to port cc size for 300 cfm that's about 245-180 cc which is a pretty big range, and Trick Flows are 190 cc putting the on the small side and fairly high velocities 308 fps. If these are correct seems like not enough port cc is generally more of a problem.

That definitely play a role at particular rpms.

When you calculate a lot of these engines aspects out you see a lot of symmetries.

They tend to make torque.

View attachment 1716282362

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."

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

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.