The direct injection gassers do not inject the primary fuel charge until just prior to TDC along with the spark. Some direct injection engines do inject a wiff of "pilot" fuel just after the exhaust valve closes for "cooling". However the mixture is too lean to burn until the pilot injection event takes place later. Given the lighter weight of the direct injection gasser. No EGR valve. No EGR cooler. No turbo. No Intercooler. Lighter starter. Single battery. No glow plugs. No variable vane waste gate. No urea exhaust fluid. No particulate filter and a lighter weight trans. Lets forgot how much cheaper gasoline is that diesel. Lets see a larger oil pan that requires more oil. Some spendy fuel, engine oil and trans oil filters too. Does that add up to less updront cost and down the road service? The light diesel's days in pickups are numbered.Unless the EPA and CAFE lighten the regs back to 2006 levels. If a diesel pickup could be a 24 valve Cummins with just a turbo and a Bosch "P" pump. Along with a six speed manual trans. With diesel costing the same of less than gasoline. Then sure.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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