Diesels will always smoke to a degree with current technology. Diesels always burn both rich and lean at the same time because they have diffusion burning not pre-mixed. The cooler fuel that is farther from the diffusion front and towards the end of the cycle is rich and has less dwell time to break down. Some of this stays as longer carbon chains of "stuff" and leaves the exhaust uncombusted. This is a waste of fuel - bad for your wallet and bad for the environment/your lungs.
As you increase the hp output per cubic inch on a diesel (i.e. the amount of fuel your are trying to burn in that space in a given time) the efficiency falls off pretty quick with more fuel heading out the exhaust and more heat into the cylinder walls. It actually falls down to near the efficiency of gas engines at high loads.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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