mhuppertz

Mark’s Unified Fuel Theory (shocking lack of empirical data, plenty of subjectivity)

As some of you know I just ran 20 gallons of Jet A through my Dodge (with a quart of 2-stroke oil) and have drawn some conclusions.

My truck hardly smoked at all with Jet A as compared to straight K2.
The engine ran noticeably smoother and seemed to have more power, especially in the low end (unverified, but 363K miles of seat time). Another thing I noticed is the head gasket hardly leaked at all, even with 100+ MPH assaults on the speed limit.

Here is the theory part: I believe running K1 (or a mix) is the equivalent to running high octane fuel in a high compression gasser.

K1 burns more slowly than K2, so my truck (with its pump timing on the edge) benefitted the slower burning fuel. I can imagine this affect would be even more noticeable in the heat of the summer.

Also, my mileage did not suffer noticeably.

So extrapolating, I guess that explains the large power increases with water/meth injection on aggressively timed oilers.

I am back on B5 and it’s a drag. Truck stinks again and is running like it always has, noticeably less smooth.

I am going to do a 50-50 mix of K1 and K2 next to see if that gives me the same outcome.

I know this is heresy, but I don’t care!

thrashingcows

.....Man that heading had me laughing so hard.....Thanks!!...

Rick 12v CTD

what's k1 and k2? and what's Jet A?

kerosene?

mhuppertz

Sorry, K2 is diesel, K1 is kerosene, Jet A is very clean kerosene used in aviation.

Mark Nixon

I agree, an A+++ on the title.
How is your truck set up, fuelwise?

Mark.

mhuppertz

I have a piston lift pump and oversized banjo bolts. I also cut my stock fuel pin within millimeters of its life. POD injectors, fuel screw all the way in, and a medium setting on the star wheel. I have the pump advanced as far as I can before it misses.

Mark Nixon

That is a boatload of timing.
Do you have the thinnest washers you can run under the PODs, for good measure?

Mark.

mhuppertz

Yes, but I am considering cleaning the injector bodies and the holes in the head really well and spraying them with copper tack and going washerless.

brainfade

I'd be very interested to hear if the injectors seal without the washers. It can only help with the spray pattern/piston bowl issue.

SORTIE

you have lost your mind (or come into a LARGE inheritance)

WTH does a gallon of JetA run ya? Lordamighty that's got to be a wallet jolt

here I was thinkin this thread was about aggressive fuel filtering or polishing

mhuppertz

One of my clients is a helicopter company. They have to defuel the birds before they bring them into the shop and can't reuse it, so they just dump it in a storage tank and have to pay to have it pumped out. They would rather I use it!

mhuppertz

What do you mean exactly? Lost my mind how? Large inheritance why?

ChrisLib

FWIW I run .016 washers under my PODs and it hazes pretty much the same as when it had .030`s, MAYBE a bit better. I do have one popping early now so the haze is real bad but I`m working on that ;-). That is a very interesting find regarding the kero, I think it is amazing the various "fuels" these clanky old beasts will run on.

mhuppertz

I'll tell you one thing, when they implement mandatory retroactive testing for diesel's here in New Mexico, I'll be running Jet A or Kerosine. Hardly any smoke at all.

loch

You guys might want read this.

http://www.thedieselstop.com/forums/...-diesel-62296/

Its not best idea to run kerosene or jet fuel in our trucks.