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Message: [QUOTE="Garbage_Mechanic, post: 1103036, member: 1610"] Here is how I see this: Every higher horsepower Cummins, Caterpillar, or Detroit Diesel (2 or 4 stroke) has a viscuous vibration dampener. Development of the viscous dampener was part of a long list of items that opened the way for high horsepower diesels of today. Our 7.3 was first designed at 215 hp. That is 26.8 hp per cylinder. Say we go with a very mild build and go to 350 hp. Now we are at 43.75 hp per cylinder. How much harder is each power stroke twisting the crank? The reason diesel engines need better vibration dampeners because the forces are so much more violent than any gasoline engine. The vibration being dampened is the twist on the crank in one direction of the compression stoke, followed by the twist the other direction of the power stroke. Since we have 20-1 or so, with the gas max of 13-1 or so you can see the force is higher to start out. Now we go over tdc and fire the cylinder, twisting the crank the opposite way. And we do it at lower RPM. [/QUOTE]

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