Does anybody sleeve valve stems in the airflow of the ports?

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Ottmundr

Ottmundr

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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;

rl=https%3A%2F%2Fwww.aedmotorsport.com%2Fassets%2Fuploads%2Fmaterial-profiles%2Fstreamline-tube3.jpg


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?
 
There must be a good reason it’s not done.

easy one is if it comes loose and goes into the engine.

next one is it can only go as far as a closed valve, but the airflow is when the valve is open.
 
Ottmundr said:
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;

View attachment 1715935218

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?
Click to expand...

Coanda effect .

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.
 
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maybe i just done get this thought???????? but is that not what were do the the guide boss(small block mopar)
we shape and point the guide boss to the far seat...............
 
MMissile said:
Ram-Air V Pontiac.

hppp_0903_15_z-ram_air_v-intake_ports.jpg
Click to expand...

Wow! i knew Ford did this but not Pontiac. Ford did it through the intake port though. Not that that's any better.........:rolleyes:

Edit intake Manifold had a push rod tube cavity
 
Cudafever said:
Wow! i knew Ford did this but not Pontiac. Ford did it through the intake port though. Not that that's any better.........:rolleyes:

Edit intake Manifold had a push rod tube cavity
Click to expand...
That is the intake port of the stage 5
 
Cudafever said:
maybe i just done get this thought???????? but is that not what were do the the guide boss(small block mopar)
we shape and point the guide boss to the far seat...............
Click to expand...

something like this?
guide wing.JPG
 
The Poncho Stage 5 is the equivilant of the Ball Stud Hemi . Never made it into production .
 
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