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200+Hz air valve?
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AVGresponding:

--- Quote from: Haenk on May 22, 2023, 08:42:40 am ---"aerodynamic drag"

Any idea about the loss you are talking about? 1/10000th of total motor power?

I assume the best option is to hone your motor, new sealing rings and low viscosity motor oil. For another PS or two, polish out your exhaust manifold.
If allowed, straightpipe & cat delete.
If going crazy, add (larger) turbo and/or compressor.

And somewhat older Germans know another trick: Adding a foxtail to your antenna adds another PS.


--- End quote ---

In fact aerodynamic drag in the crankcase, known as windage, is a serious loss, and much effort goes into minimising it.
I recommend you to watch the recent Engineering Explained video on the new Corvette C8 Z-06 engine.
ELS122:

--- Quote from: Haenk on May 22, 2023, 08:42:40 am ---"aerodynamic drag"

Any idea about the loss you are talking about? 1/10000th of total motor power?

I assume the best option is to hone your motor, new sealing rings and low viscosity motor oil. For another PS or two, polish out your exhaust manifold.
If allowed, straightpipe & cat delete.
If going crazy, add (larger) turbo and/or compressor.

And somewhat older Germans know another trick: Adding a foxtail to your antenna adds another PS.


--- End quote ---



aerodynamic drag for boxy components going trough heavily oil saturated air, moisture, and co2 at >1km/s isnt a thing.

20hp of loss in aero.
another 20hp of loss in pumping losses at idle without egr.
yeah i'd say pneumatic losses are a problem in engines
CatalinaWOW:
I personally think this quest is silly, but if you really are going to pursue it a mechanical solution seems best.  Unless your engine is exotic enough to have variable valve timing the required openings and closings of the valves are fixed relative to crankcase rotation so a rotating disk on the crank with appropriately placed ports would do the job.  If you felt that transport times forced timing changes as a function of rpm a much slower responding servo changing the disk angle relative to the crank would do the job.




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