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Tractor Talk Discussion Forum

big cubes or big turbo

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rboulware

03-26-2006 13:02:10




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One of the factors I look at when evaluating these tractors is the motor. I have notice some motors are smaller than others but put out the same HP as a larger one. The main differeance is the turbo charger. I tend to like large displacement natural Aspirated engines over smaller turbo charged engines. Which do you guys like better? I tend to think a given horsepower spread over a larger displacment engine is generally beter for longevity than a smaller engine putting out the same horsepower. Do you all agree with this logic?


I also tend to like motors that put out there power in the lower RPM rang and have more torque. What do yall think?

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JDknut

03-27-2006 03:36:49




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 Re: big cubes or big turbo in reply to rboulware, 03-26-2006 13:02:10  
I'm with you on that one 100 percent.



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Jerry/MT

03-26-2006 20:41:50




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 Re: big cubes or big turbo in reply to rboulware, 03-26-2006 13:02:10  
I tend to think the way you do. I like reduced complexity on something like a farm tractor and I would prefer a normally aspirated engine to one that has a turbo just because there is less to go wrong. However, the choice of engines in certain horspower classes are made by the manufacturer and you may not get to make the choice. The designers and builders of modern equipment obviously think that both the reliability and cost per unit horspower warrant tubo'd engines and I think we will be seeing more of that in the future. As more and more turbo's come into use, the unit price drops and they are cheaper to use. As the engine manufacturer's get more and more experience with turbo's engines, they understand the design requirements for longevity and reliability and how to make the engines better and the life and reliabiility improve. I'm less concerned about a turbo'd engine today than I was say 10 years ago. Just my opinion.

A retired aircraft propulsion engineer.

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rboulware

03-27-2006 07:57:45




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 Re: big cubes or big turbo in reply to Jerry/MT, 03-26-2006 20:41:50  
Well, I can tell you that it is MUCH cheaper to build a Turbo engine with a BIG turbo on it and a small engine. They can increase margin cost and sell them as if they were "big engines" I think Thats the reason for the turbo. Also Tractors in MY Opinion are not expect to run the hours or last as long as the older tactors like the 4020 for example...these 4020's are nearly 40 years old and they are used just as godd as before, 40 years ago. I think todays time, if these new tractors were put through as many hours as the older machines was. They would not last as long. Here again just my 2 cents..

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ejr-IA.

03-26-2006 17:17:08




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 Re: big cubes or big turbo in reply to rboulware, 03-26-2006 13:02:10  
Theirs no substitute for cubic inches.



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rboulware

03-26-2006 20:22:06




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 Re: big cubes or big turbo in reply to ejr-IA., 03-26-2006 17:17:08  
I say Aman to that!!!



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