One little detail here. Firing cycles are not in hertz. Yes they fire so many times per second, but blow down time for a cylinder has nothing to do with cycles per second. Blow down is just an ordinary exponential time constant. It takes so long to blow down and that is that.
What it means is that a cylinder pops a pulse into the pipe. Separation time between pulses is the major factor in all exhausts. It is why you cannot turn a 3 cylinder engine at a higher speed and make it sound like a 4 cylinder, or a six, or an 8. It is why they all sound different. Putting more cylinders on the same pipe eventually causes the pulses to run together, to the point that an 8 or 12 has almost no distinguishable pulses at all.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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