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Tractor Talk Discussion Forum

turbocharging a john deere 70 diesel

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Tom in ca

02-28-2006 18:02:14




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I was wondering if i can purchase a kit that would make it possible to turbo charge a 70 diesel. Thats if it can be done




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Mike w J

03-01-2006 18:56:53




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
I have been told nitrious oxide or oxegen injected into the intake with all the fuel you can get threw the injectors will add lots of power But I haven't tried it yet but someday I will.



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buickanddeere

03-02-2006 10:38:01




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 Re: turbocharging a john deere 70 diesel in reply to Mike w J, 03-01-2006 18:56:53  
If oxygen/oxegen kits worked, why does everybody sell nitrous kits instead of oxygen kits?



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Mike w J

03-02-2006 17:55:46




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 Re: turbocharging a john deere 70 diesel in reply to buickanddeere, 03-02-2006 10:38:01  
The way it was explaned to me was that OXYGEN will 100% burn but air from the atmosphere will not burn 100% because carbon dioxide don't burn so the more oxygen mix the faster and hotter the burn I don't know but I thought it sounded good He is a votec diesel instructer



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buickanddeere

03-03-2006 10:59:11




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 Re: turbocharging a john deere 70 diesel in reply to Mike w J, 03-02-2006 17:55:46  
Co2 is only a few hundred parts per million in air and that's in a room with a lot of people. Nitrogen N2 is about 2/3 of the all the air around you and it's inert except at very high temps. Adding a few more % oxygen alone to the intake air will raise combustion temps sky high even if lean mixtures are avoided. N2O is about 2/3 nitrogen as a buffer and 1/3 oxygen. It will melt/cut an engine apart like it was torched if operated too lean as well. N2O is injected as a liquid under pressure which drops to about -40F as it vapourizes. That alone adds power with a denser mixture. A cooler air/fuel mixture is less prone to detonate in a gasser engine too.

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Gene Davis (Ga.)

03-01-2006 19:25:56




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 Re: turbocharging a john deere 70 diesel in reply to Mike w J, 03-01-2006 18:56:53  
Why not look for one of the old propane adding booster kits??



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Jon Hagen

03-01-2006 11:28:12




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
OOOOOH,I don't even want to think about putting a bunch of turbo boost pressure in one of those old 2 cyl trip hammers. It reminds me of my uncles old 80 diesel. It broke a rod at about mid point on the rod. The rod half still attached to the crankshaft came up right under the little pony engine,punched its guts and lifted it right of the top of the crankcase. Once the broken rod finished with the pony engine,it turned around and punched through the rear of the crankcase and jammed itself into the transmission which locked up all the trans gears.
The poor old locked up thing had to be skidded onto the salvage yard ramp truck,then skidded off into the yards disassembly shed. I had never seen such instant total distruction before,but the guy at the salvage yard said broken rods were fairly common in the old 2 cyl diesels.

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buickanddeere

03-02-2006 10:36:35




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 Re: turbocharging a john deere 70 diesel in reply to Jon Hagen, 03-01-2006 11:28:12  
The 1st few model 80's did bust a few rods if pounded hard. They were beefed up and busted rods are not a problem on any other model other than the very early model 40.



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Dr.EVIL

03-01-2006 07:10:12




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
Turbos work on airflow. RPM really makes no difference, especially on a governed speed engine. Problem will still be the two cylinders firing in close succession to each other, then the long pause. To size the turbo to give any reasonable amount of boost without over speeding the turbo would be very difficult. IF You changed the firing order of the engine it may work however. You need the cylinders to fire as close to evenly as possible.

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Robert in W. Mi.

03-01-2006 06:58:38




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
third party image

I've seen more than one 2 cyl. turboed... BUT, maybe if you want more power, you should just switch colors??? ;>)

Robert



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buickanddeere

03-01-2006 05:29:02




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
Why would anyone want to turbo a two cylinder diesel? How much money do you have to spend? How about a Whipple screw compressor from a 3800 Buick?



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msb

02-28-2006 20:07:34




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
A mechanically driven supercharger(a small Roots blower)with a waste gate might have some chance of working.A turbo? NO!Too many people have aready tried it and failed.



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edchainsaw

02-28-2006 19:07:09




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
I think to make it work is to "stack" the turbos and have huge ones. the big problem comes from the 2 pistons firing side by side. then coasting... the pressure in the intake would have to be so high ... I know it can be done.. just not feasable or effective.



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barnrat

02-28-2006 19:02:06




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
Oh great! Another thread on turbocharging/supercharging a 2cyl Deere. I think the conclusion after several discussions on this topic it was determined that you can add boost to a 2 cyl Deere, but it was not worth it. It's much easier just to take advantage of the potential cubic inches available on most two cylinder tractors.



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Dave in Tx

02-28-2006 18:51:05




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
M&W years ago had a 730 JD changed to a two-cylce with a turbo Putting out around 100hp if I remember correctly. Odd sounding rig



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DRL

02-28-2006 18:44:29




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
Not saying that it can't be done, but I'm pretty sceptical. The JD two cylinder engine has the two compression strokes in succession, and then a 540 degree period of coasting allowing the exhaust and intake strokes to take place. This is true of both gas and diesel. Also, like was said before, you aren't going to have the RPM's necessary for turbo charging, and I really don't think that you would want that old two cylinder turning that fast. Just my opinion, I could be wrong. Has happened before.

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Gene Davis (Ga.)

02-28-2006 18:25:04




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  
I would think that the engine in the 70 diesel would be too slow in the rpm department unless you used a huge turbo.



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slowride

02-28-2006 18:12:16




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 Re: turbocharging a john deere 70 diesel in reply to Tom in ca, 02-28-2006 18:02:14  



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