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Tractor Talk Discussion Forum

Mixing a little diesel with gas to improve power.

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55 Deere 70

11-02-2006 09:24:37




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I have a 1934 John Deere GP. I have heard that if you add 1 gallon of diesel to very 5 gallons to these older John Deeres it will increase the horse power of the tractor. If any one know if this works and what the diesel dose to increase the horse power I would like to hear from you. Thank you 55 Deere 70




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Oldmax

11-03-2006 06:49:26




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
I don't know about the bigger engines but in the smaller ones when you run them on #1 fuel you have a 20% drop on power "Koler" you also have to raise operating temp And change head raising Compression . I have heard of some people running 25% #1 Heating oil in "A" Model ford's during WW-2 Because they could had Stamps for heating oil & stamps for Gas were hard to come by .



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dogobat

11-02-2006 20:18:36




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
diesel lowers octane. your deere is low compression, spark ignited. disregard what was posted about slower burn, it's nonsense.(had to replace a word there, its a family website) I ran fuel oil in my H at times (it was in the furnace tank, too lazy to go get gas) horsepower gains are negligible, kinda smelly, a real birch if you stall your tractor w/a carb full of anything but gas..... .don't over think this whole mess - fuel all costs about the same, keep it simple

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RusselAZ

11-02-2006 19:39:52




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
In the 70's I had a nice old IHC regular with the big heater exhaust manifold on it. It did not pull well on gasoline so I tried some mixes. Ended up with a 15 gallon barrel that I would put 10 gal of kerosene in it and 5 gal of gasoline. The old girl loved it. Both fuel tanks were good and it started easy on gasoline.



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HAPPY DEERE

11-02-2006 18:35:53




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
my neibor has a gp among with 42 other restrored tractors and at plow days he likes to run 75% gas and %25 deisel only after she gets warmed up it wil burn through any all fuel motor though just start it up on gas then switch it over after its ran for a while



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Hobo,NC

11-02-2006 18:25:31




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
My best’izz guess would be the diesel lowers the burn time of the fuel. Instead of a quick bang, you git a slow burn like high octane fuel thus reap the benefits of increase burn time thru the power stroke of the piston…



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buickanddeere

11-02-2006 19:39:51




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 Re: Mixing a little diesel with gas to improve pow in reply to Hobo,NC, 11-02-2006 18:25:31  
Rapid combustion ,without detonation makes more power than slow combustion. The engine turns combustion heat/combustion chamber pressure into torque more efficiently near TDC than any place after TDC. The sooner the burning is done before the exhaust valve opens the better.



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1936

11-02-2006 12:44:14




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
Pullers of 720 diesels replacce the oil in the oil breather pan with gas. Went under hard pull the gas in sucked in and a lot of extra HP for a short time. No answer for your GP.



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Dick L

11-02-2006 11:36:13




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
I dont know about your John Deere"s but since the 1950"s we have always tried to put in a pint of diesel per tank of gas in our Olivers when plowing or fitting ground.



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ihfan

11-02-2006 11:16:55




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
BE CAREFUL! A 50/50 mix of gas&ker.has A higher risk of igniting by static electricty!



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buickanddeere

11-02-2006 11:07:47




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
That tractor was desiged to run of refinery left overs they got rid of cheap after removong the gasoline. If the coolant is between 195 to 212F. She should burn kerosene, #1 diesel, kerosene, JetA-1 and Jet B. Gasoline was intended just for starting and warmup. Gasoline is fine. As for HP? The seat of the pants dyno is not accurate.



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old

11-02-2006 11:03:41




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
I have a 1935 JD-B all fuel tractor and years ago we would run a 50/50 mix of gas and diesel and it did seem like it had a lot more power when we did that. But now days with the price of gas/diesel I just run it on gas, I only use it once in a while and when I do we rake hay and or we are at a show

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Mike M

11-02-2006 10:13:39




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
I was plowing with my A once and switched from gas to kerosene while going down the furrow and could not tell any difference,but could smell it.



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Bus Driver

11-02-2006 09:34:17




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
I certainly have used a lot of time over the years posting my belief that Diesel has some heavy petroleum "fractions" that really do not burn well in a spark ignited engine. If your tractor is an all-fuel model, I would add kerosene- K1.



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Bob

11-02-2006 09:30:34




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 Re: Mixing a little diesel with gas to improve pow in reply to 55 Deere 70, 11-02-2006 09:24:37  
I can't say if it actually DOES work to give a gas tractor more HP, but #2 diesel DOES have more BTU's per gallon than gasoline.

BTU's = HEAT ENERGY = POWER (Maybe!)



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Jay (ND)

11-02-2006 09:41:51




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 Re: Mixing a little diesel with gas to improve pow in reply to Bob, 11-02-2006 09:30:34  
I could be wrong, but I think all it will do is lower the flash point, which I think would have a similar effect of advancing your timing.



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Bus Driver

11-02-2006 13:52:17




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 Re: Mixing a little diesel with gas to improve pow in reply to Jay (ND), 11-02-2006 09:41:51  
The Diesel and kerosene have much lower OCTANE rating and will knock because of detonation in higher compression engines. Adding the Diesel AND advancing the timing would be the very wrong thing to do. The old all-fuel engines had about 4 to 1 compression ratio. Flash point is the temperature at which enough vapor is created to burn and is unrelated to ignition timing. If any gasoline is present, then the flash point will be that of gasoline.

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John M

11-02-2006 16:33:39




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 Re: Mixing a little diesel with gas to improve pow in reply to Bus Driver, 11-02-2006 13:52:17  
Um, cetane.



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Bus Driver

11-03-2006 05:09:41




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 Re: Mixing a little diesel with gas to improve pow in reply to John M, 11-02-2006 16:33:39  
Cetane is a measure of how fast it will burn, higher cetane means faster burn. Octane is a measure of how slow it will burn, higher octane means slower burn.



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