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Tractor Pulling Discussion Forum

820JDhorsepower

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morepower

12-17-2005 15:24:34




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Thanks for previous replies. The sky is the limit injection system, turbo or blower, balancing , custom head , boring and stroking and whatever else is required to get most horsepower and how much horsepower are we talking.




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buickanddeere

12-18-2005 16:59:28




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 Re: 820JDhorsepower in reply to morepower, 12-17-2005 15:24:34  
With a correctly sized turbo a two cylinder diesel runs fine. The 80,820,830 & 840's do have more than 16:1 compression stated in the specs. If turboing the ratio needs to be dropped some in order to make max power. 200-250HP tops at 1500rpms and reasonably reliable.



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joecool

12-17-2005 15:58:28




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 Re: 820JDhorsepower in reply to morepower, 12-17-2005 15:24:34  
Do you honestly believe you can put a turbo on a low rpm 2 cyl tractor and get any hp? you would be better off mounting a electric or battery powered hair dryer. Why is it that a D has more cubes than the biggest 2 cyl diesel jd built?



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G/MAN

12-19-2005 13:19:25




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 Re: 820JDhorsepower in reply to joecool, 12-17-2005 15:58:28  
Why is it that the JD two-banger diesels run substantially faster than the "D"s? The "D" was at 501 cubes when it left production. 820s are not a whole lot smaller, and produce substantially more power. So yes, a properly sized turbo could produce good results on an 820. However, if money were no object, I'd be finding a way to mount a belt-driven centrifugal supercharger, as boost could easily be tuned with different pulley sizes.

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possible

12-18-2005 10:45:51




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 Re: 820JDhorsepower in reply to joecool, 12-17-2005 15:58:28  
my grand-dad once had a corvair turbo on a JD A, went from 45- about 53 horse. so it will help, just not durastically..were bout to dig it out of the shed and see what we can do with it...lol



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Lamont

12-18-2005 03:43:05




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 Re: 820JDhorsepower in reply to joecool, 12-17-2005 15:58:28  
Turbo use has more to do with exhaust flow than RPM since that is what drives the turbo. Of course more RPM creates more flow, but so does more cubic inches. I would think there would be plenty of exhaust flow to drive the turbine. On the other hand, the compressor fan would have a big job of filling those huge cylinders. I can see where it could be done, but I think the major obstacle would be the size of the valves, especially on the intake side, but also on the exhaust since you would be putting more air into the cylinder. It's going to take some large valves on cylinders that size. Then you've got the issue of holding the head onto the engine due to increased pressure. Got enough room bigger valves AND more head bolts?

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J.R. Ewing

12-17-2005 21:38:35




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 Re: 820JDhorsepower in reply to joecool, 12-17-2005 15:58:28  
it's been done by several people. They usually run the RPMs up a little bit but definitely possible and they made pretty good horsepower.



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