fuel warmer test results are in !!

[ELF]

I have been testing a fuel warmer off and on for about 7 months.

summer testing was four 100 mile round trips. 2 trips with the warmer on and two with warmer off. trips were done on 4 different days but temps were 80f to 85f. trips were early morning with very little wind.60mph cruise control.
trip no. 1 with FW. 31.9 mpg
trip no. 2 no FW. 33.9 mpg
trip no. 3 with FW 32.1 mpg
trip no. 4 no FW 34.1 mpg
my conclusion about 2mpg loss in warm weather.

one test at 24f did 20 mile test flat ground 10 west/10east. 55mph cruise.
west with FW 34.9 mpg
east with FW 35.3 mpg
west no FW 34.7 mpg
east no FW 35.5 mpg
my conclusion no change in mpg.

I did 4 test runs today 20 mile flat ground 10 west/ 10 east 55 mph cruise intake temp -8f
west no FW 29.7 mpg
east no FW 36.5 mpg
west with FW 29.5 mpg
east With FW 36.4 mpg
west no FW 28.5 mpg
east no FW 37.1 mpg
west FW 30.5 mpg
east FW 35.5 mpg

There was some gusty winds out of the NW today thats why big difference from west to east.
My conclusion no change in mpg.
One interesting note, when I took the FW off the radiator hose the FW was cold to the touch, I don't think it was warming the fuel too much. When I tested in summer It was hot to the touch.

I have some pictures but don't know how to post them, I uploaded them to my garage but how do I get the url to post them?

[GasSavers_Red]

Nice findings Wonder if anyone has tried this on a carb'ed car to see if there is a difference based on fuel deliver systems

Right click on the image, select properties and url should be somewhere on that screen depending on your browser. Copy that and paste that between "[img][/img]" tags

[ELF]

A couple of pics the one with the rope was how I tied it up off the hose for testing, the other one just shows the warmer.
BTW when I had the warmer on the hose for testing it was wrapped with insulation to keep the heat in.

[diamondlarry]

If that is the fuel warmer I think it is, you are supposed to wrap it in several layers of insulation to hold the heat in. In the temps you have now, it's probably acting more like a cooler than a warmer without being insulated. I have one of these laying on my couch but it's too cold to mess with.

[ELF]

Originally Posted by ELF

BTW when I had the warmer on the hose for testing it was wrapped with insulation to keep the heat in.

I did.

[diamondlarry]

OOPS! I missed that. My apologies.

[zpiloto]

On my 626 I got a 3% increase. Mine was 3/8 copper tubing laided across the radiator and wrapped in foil. My computer crashed and I lost most of my data for my cars . so take it with a grain of salt. YMMV.

[bones33]

[QUOTE=ELF;39619]I have been testing a fuel warmer off and on for about 7 months.

summer testing was four 100 mile round trips. 2 trips with the warmer on and two with warmer off. trips were done on 4 different days but temps were 80f to 85f. trips were early morning with very little wind.60mph cruise control.
trip no. 1 with FW. 31.9 mpg
trip no. 2 no FW. 33.9 mpg
trip no. 3 with FW 32.1 mpg
trip no. 4 no FW 34.1 mpg
my conclusion about 2mpg loss in warm weather.

one test at 24f did 20 mile test flat ground 10 west/10east. 55mph cruise.
west with FW 34.9 mpg
east with FW 35.3 mpg
west no FW 34.7 mpg
east no FW 35.5 mpg
my conclusion no change in mpg.

I did 4 test runs today 20 mile flat ground 10 west/ 10 east 55 mph cruise intake temp -8f
west no FW 29.7 mpg
east no FW 36.5 mpg
west with FW 29.5 mpg
east With FW 36.4 mpg
west no FW 28.5 mpg
east no FW 37.1 mpg
west FW 30.5 mpg
east FW 35.5 mpg

There was some gusty winds out of the NW today thats why big difference from west to east.
My conclusion no change in mpg.
One interesting note, when I took the FW off the radiator hose the FW was cold to the touch, I don't think it was warming the fuel too much. When I tested in summer It was hot to the touch.

QUOTE]


ELF, do you have any data on the temperature of the fuel? With WAI people are finding that about 100F is the best temp, wonder if there is a similar optimum temperature.

[ELF]

No I don't have any data on fuel temp. But my testing in warm weather shows that too much heat is bad for FE.

I think WAI is a more logical route since heating the gas is not going to make enough of a temp change to overcome all that cold air.

[70 mpg jetta]

senior enginer @ Champion Spark plug booth @ SEMA show
(early 90's) claimed that 90 f is ideal temp for max pump gas
combustion!
keep im mind not to confuse max combustion due to hi fuel temp and loss of potential power extracted for each combustion chamber filling (volumetric efficiency)
also an M.A.F. is pretty good at metering air and compensating for density due to temperature variations, there is no equivalent device for measuring the density of fuel delivered to the engine - or is there? anyone, anyone?