How does cid make power?

273 said
I keep hearing displacement makes power but don't see how so my question Is how?

But let me clarify what I mean, I understand if you raise torque at any
Rpm at that rpm hp will also raise. Torque is obviously heavily related to displacement
If I was to say I'm gonna build a 440 without any other info you could ballpark guess how much Torque will be made. Because torque happens in a narrow range for an naturally aspirated engine 1-1.5:1 lbs-ft per cid and for most engines we deal with would be narrower, your not gonna get 550 lbs-ft NA out of a 100 cid engine but could get 550hp since there about 0.5-5.5:1 hp per cid range.

Torque is basically one powerstroke and hp is the sum of all the powerstrokes added up over time.
So obviously displacement has a huge impact on one powerstroke and only has one powerstroke to do it.
The limit on hp is mechanical limitations and ve% limits of rpm so as long you can keep spinning it higher while filling the cylinders you'll make more hp.

So question is how does displacement makes horsepower?

This is amazing. You were arguing with me on this and now your asking questions on it.

273 said
Not really if you 3x the cid with same top end (heads cam etc..) theoretically just move the powerband down about a 3rd of what it was. You would need to triple the airflow.

This is part of the problem right here.
“theoretically” is what your going on.
When you actually do stuff, like build your own engines and sit down and think about camshaft selection, without a doubt, when you actually do this, you will learn something.

273 said
I wouldn't say at any given rpm, a 400 with run out of steam way before a 289 with similar top end but ya idle to where ever the rpm 289 starts to takes over.

Putting an289 top end on a 400?
Ain’t much crazier than that.
Then again, there was that dynamic duo that figured they could port there heads while the engine was running by dumping sand into the intake and rev’ed it up.

273 said
If you 3x the rpm with 3x airflow same thing, airflow the key component short block is just got to be able to handle it, same hp larger engine trades rpm for torque compared to smaller.

So you think based on the “theoretically.”

273 said
Kind of my point a different displacements somewhat guaranties a certain amount of torque but hp could be very low to high, building a 440 doesn't guarantee more power than smaller engines like it somewhat does with torque.

If hp was tied yo cid the hp per cid range would be smaller.

“Theoretically.” Right?