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JP-8 Jet Fuel

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  #46  
Old 06-04-2014, 04:34 PM
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Originally Posted by HT32BSX115 View Post
DON'T do it!

Think Kero mixed with gasoline............. Ask anyone here what happens to a 6.0L engine when you mix gasoline with diesel (gasoline mixed with K1 would be much worse IMHO since Kerosine has lower lubricity)
Sorry, I misspoke. I didn't mean I was going to run my 6.0 on JP-4 sooner or later. Just that I was probably going to experiment with fuels other than pump diesel sooner or later.

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I don't know where you'd get it anymore though. The USAF stopped using it in the mid 90's It was pretty much completely replaced by JP-8.
I used to have access to a ~10,000 gallon container of old, probably-will-never-be-used JP-4 that had been forgotten. Used to.
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  #47  
Old 06-05-2014, 10:45 AM
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I used to have access to a ~10,000 gallon container of old, probably-will-never-be-used JP-4 that had been forgotten. Used to.
Now that would be REALLY cool if it were kerosine or diesel!
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  #48  
Old 06-05-2014, 03:14 PM
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Just add oil to it LOL
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  #49  
Old 06-17-2014, 03:47 PM
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I'm actually considering doing this. I work on Gray Army Airfield at Fort Lewis, and we take fuel samples during preflight every time we go up. Pull a quart of fuel out of the six tanks on our CH-47s, and it goes into a fuel sample station. If the aircraft lands and takes on more fuel, then the old sample is void and not suitable for putting back into the aircraft. I may take that fuel, pour it into a fuel can, and start using it diluted with pump diesel. Maybe 5 gallons per tank. I figure it's a free source of fuel, and it should work just fine when cut with pump diesel.

Hmmmmm...
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  #50  
Old 06-17-2014, 08:14 PM
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According to the TM for our FMTV JP-8 is the tertiary fuel and the Army still runs it in all of it's tactical vehicles. We have an F-350 that we use for Conus EOD Response. When one of the new guys accidentally filled it with JP-8, our maintenance guys dropped the tank, cleaned it, and replaced all the filters before they would let us use it. Take it for what it's worth.
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  #51  
Old 06-20-2014, 02:55 PM
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Originally Posted by slowlanemcvane View Post
I'm actually considering doing this. I work on Gray Army Airfield at Fort Lewis, and we take fuel samples during preflight every time we go up. Pull a quart of fuel out of the six tanks on our CH-47s, and it goes into a fuel sample station. If the aircraft lands and takes on more fuel, then the old sample is void and not suitable for putting back into the aircraft. I may take that fuel, pour it into a fuel can, and start using it diluted with pump diesel. Maybe 5 gallons per tank. I figure it's a free source of fuel, and it should work just fine when cut with pump diesel.

Hmmmmm...
Probably "ok" in an older rotory type diesel injection system mixed with some biodiesel, light oil, 2-stroke oil, etc.

I wouldn't put it in a HEUI or Common rail engine.
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  #52  
Old 06-20-2014, 03:00 PM
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Originally Posted by HT32BSX115 View Post
Probably "ok" in an older rotory type diesel injection system mixed with some biodiesel, light oil, 2-stroke oil, etc.

I wouldn't put it in a HEUI or Common rail engine.
If anything a HEUI is the most tolerant to fuel type being the actuation is done by engine oil and the fuel supply is constant pressure.

Mechanical injection, and common rail utilize far more complicated injection pumps and parts.

Josh
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  #53  
Old 06-21-2014, 09:12 PM
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Originally Posted by Bullitt390 View Post
If anything a HEUI is the most tolerant to fuel type being the actuation is done by engine oil and the fuel supply is constant pressure.

Mechanical injection, and common rail utilize far more complicated injection pumps and parts.

Josh
I am thinking that HEUI injectors might be fairly sensitive to low lubricity fuel in the "fuel-side" of the injector, which might contribute to piston "stiction" .............Is that even a word?)

You're right though, that fuel injection pumps might be more susceptible to damage from lower-lubricity fuel.
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  #54  
Old 06-21-2014, 09:24 PM
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Quote:
Originally Posted by HT32BSX115 View Post
I am thinking that HEUI injectors might be fairly sensitive to low lubricity fuel in the "fuel-side" of the injector, which might contribute to piston "stiction" .............Is that even a word?)

You're right though, that fuel injection pumps might be more susceptible to damage from lower-lubricity fuel.
The earliest 6.0 injectors suffered piston scarring, but the updated injectors with the DLC are more durable.

I have been curious about plunger "stiction"... It seems some failed injectors do suffer some form of that. Though I would likely blame low fuel pressure for it.

Josh
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