Question on port matching

Rat Bastid said
Actually you never want the intake smaller than the head. They should be the same size but if you have to have a mismatch, the port in the intake needs to be bigger than the head, not the other way around. A smaller port in the manifold is a sure fire power killer.

Rat Bastid said
A sharp edge in the direction of flow is a much better scenario than having a transition to a sharp edge the other way. If the sharp edge is on the head, the air will simply shear off of it and follow the port wall.

If you have the intake smaller where it meets the head, you impose a big low pressure area right there and the air tries to fill in that gap. When it does, it causes eddies and such that kill flow. There are dozens of YouTube videos showing this happening. You never want the intake port smaller than the head.

Rat Bastid said
I said IF you have to have a mismatch, make the intake bigger than the port in the head. Simple as that. Don’t make it something it’s not.

What I’m understanding is:

Intake port window smaller than the head? No

Intake port window matched to the head? Yes. The goal.

Intake port window bigger than the head? Yes, Acceptable, Better than smaller

That’s the conclusion I come to with what RB is stating.

We all? agree Matched is the goal.

But, I always thought (from reading various articles and books over the decades) a smaller intake port window would be better than a larger port window as they meet the heads.

Has anyone tested this or know of others, have links to articles that have? (not the matching of intake/head but the larger vs smaller intake to head?)