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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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