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Message: [QUOTE="andharri, post: 1536859, member: 31258"] I've thought about the theory 1 you've listed as well. At 3000 psi generic motor oil will compress about 1% of original volume (more if its aerated). Less volume would be easier to compress but the problem still remains that the only volume that needs to be compressed is what is lost through the firing of the injectors. A similar system to turn to in that regard would be the typical air compressor setup. They utilize large tanks to store large quantities of compressed air to supply quantities of air that the pump alone would not be able to immediately supply on its own. The great thing about compressible fluids is that they can expand and the amount of work that they can perform is much greater than that of more in-compressible fluids. The big drawbacks however are the size of pumps necessary to maintain pressure during peak usage and the inability to rapidly adjust pressure over large volumes (increased time to reach operating conditions). In any case, reducing the size of the tank is not beneficial for operating an air compressor (unless you're willing to sacrifice ability to do work for less startup time) nor would it be beneficial in the hpo system of these engines. The stabilization of pressure which would be seen using these rails is from adding a restriction at the position where the pressure is measured (ICP sensor). Restriction blocks flow, increases pressure upstream, decreases flow and pressure downstream. I'm not as familiar with the intricacies of fluid harmonics (not my area of study). I'll need to read up on it, but my initial leanings are that harmonic dampening would occur mostly at the exterior walls where energy can be lost to the surrounding environment. Placing the rail inserts inside of the oil rails would increase wall surface area but not exterior walls. Any energy absorbed by the rail inserts would just as easily be passed right back into the oil. Solids translate compression energy quite well. In confined volumes liquids do as well, yet gases are very poor (notice the trend from highly incompressible to highly compressible!). I'm still very interested to see data on the subject, and would very much like to see a penicillin-like discovery take place! Like you said, results speak for themselves. Again, as has been previously mentioned, I hope that the experimental process is rigorous for data collection because most physical explanations for the effect don't add up. [/QUOTE]