Posted by pete 23 on July 11, 2015 at 11:06:02 from (50.33.31.231):
In Reply to: 4010 turbo post posted by Donald Lehman on July 11, 2015 at 07:42:20:
It is amazing how the turbo has evolved. When it was first used the idea was to maintain a given power at all altitudes, temperatures, barometric pressures etc. It used to be that the over road trucker would power out in the mountains and deserts etc. Now days, everyone wants to put in on to increase the horsepower of a tractor that the factory designed the entire tractor around the horses they put under the hood. I saw it all the time at work. Put on a turbo, just to clear up the smoke or maybe a couple more horse. Few weeks, can you turn it up a little bit. Later, could you give it just a little more. Talk about wild boost pressures and exhaust temperatures. The factories must have felt that since their customers were doing it they might as well do it also. Some of the specs you see for max exhaust temps are completely nuts. I compare it to riding a bicycle. It should move with minimum effort and when you have to push harder and harder on the pedals, that is the same thing that piston is doing on that crankshaft. Only one way to get more power out of an engine of a given size at a given rpm and that is to increase the pressure in the cylinder pushing that piston against the crankshaft. Looks like a waste of good iron to me like scrapping an old tractor that can still do some good work.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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