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John Deere Tractors Discussion Forum
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Re: 830 adjustable cam timing

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buickanddeere

12-03-2012 07:30:41
184.151.61.178



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For what reason it"s important. I have a picture of dyno results around somewhere. It was amazing the power difference of three "identical" tractors.




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F-I-T

12-03-2012 08:38:12
184.6.247.3



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 Re: 830 adjustable cam timing in reply to buickanddeere, 12-03-2012 07:30:41  
Quoting Removed, click Modern View to see

Nothing beats having access to a dyno. My plan in the next three weeks is to get the 70D out and run it at different fuel levels showing how little you gain out of a 2 cylinder diesel when you set it to stock, and then you "turn it up". I've done that before. I need to rig up a graduated cylinder with a tap so I could derive the fuel consumption rate versus horsepower at various fuel delivery levels and plot the hp/gallons per hour.

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gtx1967jewison

12-03-2012 18:10:55
174.225.131.157



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 Re: 830 adjustable cam timing in reply to F-I-T, 12-03-2012 08:38:12  
Well on my R it gained 10hp by turning up the fuel. Starting with 48 hp, thats about 20%. On 2 different belt pulley dynos. Turning up the RPM from 1050 to 1400 gave it another five horse. Zero other changes.



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buickanddeere

12-04-2012 05:40:15
184.151.61.46



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 Re: 830 adjustable cam timing in reply to gtx1967jewison, 12-03-2012 18:10:55  
Increasing rpms's 133% to gain 107% more power if a slim rate of return. Past 1000rpm the volumetric efficiency will drop fast.



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buickanddeere

12-03-2012 16:50:58
216.183.130.235



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 Re: 830 adjustable cam timing in reply to F-I-T, 12-03-2012 08:38:12  
This link may work ?

http://i822.photobucket.com/albums/zz149/buickandde
ere/25july2010churchDraytontractorpull103.jpg



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