I just retired from GM Powertrain, building Northstar engines for Cadillac. The Cadillac engines are not currently DoD. Back in the 1980's, we did produce a engine ( 472 or 500? ) that was called the 8 - 6 - 4. This was phased out very shortly after maybe 2 years. The electronics of the day were not up to the task. I remember hearing that the engine tended to get a sticky solenoid valve, leaving the engine in 4 cyl mode. Since this was 5,000 lb car, it had a 0 to 60 time of maybe a week. The current GM DoD engines have computer controls on everything. It really helps on milage. I was told that at highway speeds of 70 mph, the average car is only drawing about 28 hp. So the engine is generally loafing at 70. So I can see how a tractor engine could power a vehicle, but you would probably not be impressed by the performance. It might take a couple of minutes to get to 70.
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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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