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Message: [QUOTE="andharri, post: 1536870, member: 31258"] I'm not sure how to do the fancy quotes of individual parts of a post.... darn. I'll play around with that later. Anyways, I'm not sure about the rails being used for harmonic dampening specifically, would be very interesting if that is the case, I'd like to see the paper written on that. Seems to me, the rail is a very simple (K.I.S.S.) way to manufacture a delivery system that provides oil at a given volume and pressure to 4 different injectors EQUALLY. It would be much more difficult to manufacture smaller individual passages from the injectors to individual outlets for hookup to the hpop, and routing individual lines from hpop to each injector would take up an awful amount of space on top of the engine. As far as restricting flow, the inserts are reducing the available volume for oil to flow, the very definition of a restriction. How big of a restriction that is and if it matters, well that's debatable to be sure. Without dimensions of the rail inserts and the rail I can't really get an idea but it IS a restriction. It could very well dissipate the wave better, I don't truly know. I did some light reading on hydraulic shock at work and from what I saw LARGER pipe diameters usually dissipate pressure waves better (from work by Newton-Laplace). This makes sense to me because the wave has more volume to move through and lose energy to heat through shear forces. I would love to see a model, but you're right about it not being worth it if you're not getting paid! Though to be honest, I would probably enjoy making that model more than the ones I'm currently working on, and it might be more useful too! Haha Personally, I'd like to be able to explain the physical phenomena that we witness because that allows it to be adapted, used for other systems, and commercialized more effectively. Not to mention that accurately explaining how/why something works gives peace of mind to the consumer and helps sell the product. [/QUOTE]