High altitude power requirements: John Deere Review  -- John Deere Tractors Discussion Forum and Review High altitude power requirements: John Deere Review -- John Deere Tractors Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

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 03-22-2005, 21:53 Post: 108573
kriegba



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 High altitude power requirements

Iíve been working with a dealer on a tractor for maintaining a 0.5 mile road at 9000 feet. I need to grade the road and do snow removal. Do I need a turbo at that altitude? Iíve looked at a 970, 4210 and a 4410. The dealer is saying that I should consider a 5320 because it is a turbo. Is this reasonable, or is he just trying to sell me more than I need? The tractor will come with a loader and a medium duty rear blade for grading. Any suggestions would be appreciated.






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 03-22-2005, 22:04 Post: 108577
kriegba



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 High altitude power requirements

Reread the post and noticed my dyslexia transposed the numbers. The 970 should have been a 790 and the 5320 a 3520. Sorry about the transposition.






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 03-22-2005, 22:18 Post: 108578
DRankin



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 High altitude power requirements

No. Your dealer is not pulling your leg.

I will find my density altitude calculator tomorrow and give you the hard numbers, but for now I will hazard an educated guess and say that depending on the temperature, a normally aspirated engine will only produce about 60 percent of its rated power at that altitude.

If I were investing in a turbo, I would investigate an external oil pump.






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 03-23-2005, 12:03 Post: 108609
Iowafun

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 High altitude power requirements

DRankin is right. I forget what the rule of thumb is that we used for snowmobiles. But 60% of rated power is in the ball-park. You may have to go bigger engines or a turbo system. 9000 feet is pretty high up.






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 03-23-2005, 12:21 Post: 108612
yooperpete



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 High altitude power requirements

Isn't that somewhere near Eagle and Vail? Back a few years ago I have a brand new '95 S-10 Blazer driving through on I-70. I had it floored and couldn't get it above 45 mph.

I agree you should go with the 3520!

P.S. I always like staying at the Tivoli Lodge in Vail Village.






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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

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DRankin 1 | Iowafun 1 | kriegba 2 | yooperpete 1 |




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