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Old 02-08-2004, 12:08 AM   #37
Vansquish
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Location: Ann Arbor, Michigan, USA/ Bloomington, IN, USA
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As for your comment about the Camshafts vs. the Crankshaft, you're right in that case, but your facts are still a bit screwed up. Long-block engines do not by nature have more torque or higher compression. It is something of a coincidence that the large portion of industrial and commercial diesel engines use an inline long-block configuration. However, it is not the block length but the compression, which has more to do with the stroke (and method of aspiration) of the engine than anything else. This would not come from the length of the crankshaft, it would come from the eccentricity of its nodes. The more eccentric, the farther the piston will travel in the cylinder, and the higher the compression ratio can be, and therefore the more torque the engine can produce. Diesels tend to have very high compression ratios compared to gasoline engines, that's where the torque tends to come from, as well as the fact that diesel is a more efficient fuel (more btu/L).
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