Propane on a five ton??? - Steel Soldiers::Military Vehicles Supersite

TheBuggyman · 03-02-2008, 21:18

Okay, we all know of the lack of power situation on the NHC-250 Cummins engine and this has been covered ad nauseum by everyone. We all know that we cannot turn up the fuel due to the lack of piston cooling so how about propane injection? There are alot of diesel trucks doing it and I've read that propane to a diesel engine is like nitrous to a gas engine.
Now, you do not have to inject extra fuel into the diesel like you do on a nitrous engine so is there a possibility that some extra power can be made without shooting the EGT's too high? I know that BTU's are what makes the whole thing chug and more chug = more BTU's, but what about the cooling effect of vaporized propane?
This would be a great add-on for that heavy load or steep hill and you could turn it on and off with the touch of a button! If I could make another 50 HP when I need it .......

Gentlemen, begin.................

DaveP · 03-02-2008, 21:28

I never have used the propane. how much cooling do you think can be obtained from this? HP expectations? any limitations? concerns? worrys? thoughts?

Angus1 · 03-02-2008, 21:35

I dont know about propane and a diesel, But I converted my trail rig to propane. it runs cool enough at idle to close the thermostat,With a small elc. fan.

joec · 03-02-2008, 21:47

Diesel and propane yes bullydog makes a kit but it's only used for short term use. Nitrous have alittle experience with look to pic

It is old pic but it has new motor. Not diesel but ...

But the kits work under the same principle.

derby · 03-02-2008, 21:54

One of our old JD farm tractors had a propane kit.Looked like a barbeque grill tank that sat on the front weights.It was enough power to rip out the rear end! I dont know about any cooling effect though.

houdel · 03-02-2008, 21:54

There was a thread or two in the Deuce modification and hot-rodding forum about propane injection.

DaveP · 03-02-2008, 22:28

Quote:

Originally Posted by derby

One of our old JD farm tractors had a propane kit.Looked like a barbeque grill tank that sat on the front weights.It was enough power to rip out the rear end! I dont know about any cooling effect though.

What was it like using it? just short burst of rear end ripping power? or could you have used it all the way across the field? providing the ring and pinion held together.

73m819 · 03-02-2008, 22:53

driving home to ga. at night a few weeks ago , i was listering to truckers raidio, thay were talking about propane use in otr trucks, there is a outfit in ok. that makes a setup for this use, one guy stated that he has been useing propane for over a year in his 475 cat, before propane injection he was getting about 350 to the ground on dyno and 5 mpg after propane injection he was getting about 525 on the dyno and 9 mpg. he said that propane is injected BEFORE the tubo, and a even mix is feed to the cylinders, the boost controls the feed, as the boost increses, a boost senser tells the injection valve how much to open, he carries a 35 gal. propane tank behind the cab, about evert three tanks of fuel he fills the propane tank.
thay said that the reason propane works is that it helps to TOTALY burn the fuel by enriching the air supply

ARMYMAN30YearsPlus · 03-03-2008, 02:25

We had a propane Allis Chalmers tractor on our farm that was I believe factory equipt to burn the fuel. I recall it running all day long without fuel stops and we had a big propane tank for cooking and running the refrigerator as well.
This was many moons ago so the pictures are all in my mind

snowplow · 03-03-2008, 02:55

Back in the late 50's I recall all the John Deer tractors on my uncle's farms in NM ran on propane, in the winter, had to start them on another fuel (gas disel?) & then after running switching to butane, they ran them all day long in the fields on propane. These were the old giant 2 cylinder tractors.
So I guess they can, I just am not sure if they were gas or disel?