I was watching this video about drag on aircraft, and I got to thinking of the illustrated soccerball as a cross section of a valve stem in the airflow of the intake and exhaust ports.
another video on the subject
I was thinking about sleeving the valve stem with a tube with a cross section thus with the air flow direction from left to right;
Depending on the speed of the air flow, I suspect that you would want to have different shapes for your airfoil around the valve stem to optimize airflow.
I am guessing that something is better than nothing though. Has anyone seen or heard of this tested as applied to valve stems?
You can sometimes change nothing but the guide shape and hurt the flow across the roof and mid. Imagine what the bowl and guide need to be shaped like an order to keep that flowing are and not slow down to the point of being pulled off the roof so it has to have the volume to move it's not just about a small space on each side of fast-moving error conjoining. I'm not in any way addressing any add-ons into a valve stem but I'm talking about the guide boss itself.
There's another topic about attaching air and or same idea as putting a stick into the center of fast moving water...and watch it reemerge in a more focused & even/faster flow... think flow balls...showing you where to work, the faster less controlled flow paths etc.. now that's where I believe this post is tip toeing.
I sometimes use Google Talk to Text and whatever the **** Google is doing it is destroying its ability to accurately translate speach.
