Heated Fuel

[gone-ot]

JOKE: "Heated fuel" is like "heated arguments"...they routinely lead to explosives events!

[bobdbilder]

I was working out for some simple DIY stuff you could do to get better mileage when I went through the subject of vaporizing gasoline, it took me to this issue of injectors and how they perform. Various people in research have done test that conclude a higher fuel temperature would reduce the size of the droplets and even change the spread of the atomized petrol. They are only looking at temps of up to 80 degC for E85.

If you search for things like;
EFFECT OF FUEL TEMPERATURE ON SPRAY PROPERTIES

or

NASA ADS: Influence of fuel temperature on atomization performance of pressure-swirl atomizers

It will lead you to some briefs and summary. The FISITA link would be a downloadable pdf file on the test report. There are more results from various other tests.

I would think that this implies that changing your fuel rail to Aluminium would increase the temperature by a bit. Then it would only mean routing some copper tubes over the cam covers would help. Yes, the fuel is returned but some do get through the injectors. In the instance there is a need to get higher temps, then more hose lines need to be changed to copper finned ones. Which is fine for me as I live next to the equator. But where there is cold climates, its a matter of twirling around the engine a bit more.

[iveyjh]

I have a 5 speed trans but bought an automatic trans radiator. I run the gasoline through the auto trans part of the radiator. I don't know how much it helps because when I do mods sometimes I do more than one. I believe that it helps.

[bobdbilder]

Cool down the tranny and heat the fuel?

I overlooked one thing though and that's galvanic corrosion; if you have Alu rails, then it should be Alu tubing. You would then need plastic holders to fix them against your engine or bodywork if they are not of the same material or alloy.

[Christ]

Running the fuel through the radiator cooler is a common diesel thing in colder temps... the block heater then helps heat some fuel up too, the fuel acts as a very small cooling catalyst for the lower portion of the radiator and keeps the fuel from gelling up as well. I've also seen some people run a coil of steel fuel line over the outside of a hard coolant line, achieving the same effect.

[somerandomguy]

Has anyone tried these fuel preheating devise?

https://youtu.be/8p4tprX8bqs

https://youtu.be/45u-tXcZdqw

[rmay635703]

This thread reminds me of all the historical members lost
Christ
Svoboy
Automic ass
DCB

wonder what happened to everyone,

maybe $5 gas will bring a couple back

[somerandomguy]

I measured temps in my engine with engine almost at regular operating temperature.
Fuel rail before entering head: 50 celsius
Radiator hose: 70 celsius
Exhaust manifold 80 celsius

I think the best location would be at the exhaust manifold to coil some copper tubing around the exhaust manifold pipe and connect to fuel system delivery line.

Diesel auto ignites at ariund 200 celsius so it will probably be safe. Will see how much mpg improves.

The exhaust manifold pipe also gets hotter and hetas up quicker than the radiator hose.

[Isaac Zachary]

I have my doubts about such a device. Fuel, especially in a diesel, is a whole lot less mass than the air. In other words, if you squirt fuel that's one part mass to 14 parts of the mass of the air, or leaner, the fuel is going to change to the temperature of the air almost imediately.

This is how a diesel runs. The fuel isn't heated until it hits the hot air. The air heats the fuel spray instantaenously causing it to burn.

[freebeard]

Would not fuel have less Btu per unit volume with the rise in temps.

Didn't we used to buy gas in the morning, and not fill completely because the fuel would expand in ambient air temps?