Question on port matching
Absolutely! Now -
How does the larger intake port to a smaller cylinder head port help and by how much or percentage is the intake port larger than the head port?
The ability of the intake or not, is not of or in question here. The question is, stated above.
Damn dude. Are you really having this much trouble understanding this? I’ve explained it more than once, more than one way.
I know in your mind you see the flow being hindered by the manifold being bigger, but it is exactly the opposite.
The flow will shear off the sharp edge and make a clean flow path. If you have a sharp edge on the down side of flow, it will cause vortices. Every time.
It’s nothing trick. It’s simple science. I’ve even laid out a simple way to test it on a flow bench.
And for the umpteenth time, I’m not saying to make the manifold bigger than the head. I’m saying IF you have to have a mismatch, make the manifold bigger than the head. This happens more often than one might think. Core shift is real. Sometimes you can’t unscrew core shift without welding. I that case, you make the manifold bigger than the head.
Leaving the port in the manifold smaller will lose power IN ALMOST EVERY CASE.
As you can see, some will come along with an outlier but the BEST scenario is to get the manifold and the head matched, without the manifold and head getting a bulge where the port match was done.
Maybe I need to make a video to explain it, although if watching the videos I’ve already posted doesn’t make it clear than nothing I can do will help.