Warmed fuel

[hoffmann277]

I ran across this website discussing warming fuel to improve economy.

http://www.eng-tips.com/viewthread.c...=155457&page=6

Search throught the forums I see diamondlarry had completed a warming mod but no results were ever posted. Has anyone else tried this to confirm?

[onegammyleg]

I have had great success in this sort of thing with +50% FE ., but i dont want to discolse my details.
Suffice it to say that its too difficult to implement on mpfi engines and the manufacturing side of my mod was complex.

[onegammyleg]

[GasSavers_Ryland]

I would think that a simple line of coolent running to the fuel rail, and a heat pipe that was tuned to start cooling it again if/when it got close to the vaporization point work work really well, and be extreamly simple to make for a MPFI system.

[onegammyleg]

Originally Posted by Ryland

/when it got close to the vaporization point work work really well, and be extreamly simple to make for a MPFI system.

Try it and see

[GasSavers_Brock]

Hey this is common practice for diesels. They do it more because the fuel likes to be warmer so they pass the fuel past the oil with a heat exchanger and it opens and closes a valve to allow more fuel to pass as it needs more heat. The fuel pump pumps about 1/2 gallon a minute and obviously doesn't burn it all and dumps the rest back to the tank, although it all runs through the fuel filter. I checked and after a long drive the fuel tank is quite warm.

With diesel this isn't a big deal but I would think with gasoline this could be pretty dangerous, but if done correctly you would think it would improve mileage.

[onegammyleg]

Originally Posted by Brock

Hey this is common practice for diesels. They do it more because the fuel likes to be warmer so they pass the fuel past the oil with a heat exchanger

Warming for diesles is because the fuel can thicken up and freeze at quite ordinary temperatures , whereas , petrol wont.
Cold weather is a problem for diesel fuel as it can begin to solidify below ?7 deg C.

You can get big electric fuel line warmers which will allow diesels to start in -40C weather.

A diesel may have a combination of tank and fuel line heaters.
They may be electric , water heat or oil heat powered , with the prefernce of passive devices with no moving or electric parts.

[GasSavers_Brock]

Originally Posted by onegammyleg

Warming for diesles is because the fuel can thicken up and freeze at quite ordinary temperatures , whereas , petrol wont.
Cold weather is a problem for diesel fuel as it can begin to solidify below ?7 deg C.
You can get big electric fuel line warmers which will allow diesels to start in -40C weather.

Well with the coolant heaters only you wouldn't think you would get any heat to the fuel right away. Of course it does use the glow plugs as well to warm things up on starting. I have started at -20F or -28C with just a 20 second glow plug cycle. It's loud on startup, but after a minute or so it quiets right down, I am told that is mostly because of retarded timing since its so cold.

So I can't image they warm the fuel in the middle of summer if it will run at -20F without heat on startup. It must have something to do with either FE or maybe emissions?

[diamondlarry]

Originally Posted by hoffmann277

I ran across this website discussing warming fuel to improve economy.

http://www.eng-tips.com/viewthread.c...=155457&page=6

Search throught the forums I see diamondlarry had completed a warming mod but no results were ever posted. Has anyone else tried this to confirm?

I believe the setup on my car was warming the fuel too much and was causing driveability problems. Check out Fran's results with warmed fuel at www.hydrogen-boost.com. Most people see about a 10% or so improvement.

[hoffmann277]

Originally Posted by diamondlarry

Check out Fran's results with warmed fuel at www.hydrogen-boost.com. Most people see about a 10% or so improvement.

I can't find anything about Fran's warmed fuel. But it's interesting hydrogen-boost.com's product seems quite similar to a water injection device that Popular Mechanics tried with much less than success they promise. http://www.popularmechanics.com/auto...32.html?page=4 They then go on claim that the product produces Brown's gas... what a notion. Guess there's no need for gasoline anymore.