regulated return have any real effect on mpg? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 12 (permalink) Old 11-11-2007, 02:09 AM Thread Starter
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regulated return have any real effect on mpg?

Does it improve mpg only if you have a major problem to start with, or do you think this mod will often result in increased mpg?

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post #2 of 12 (permalink) Old 11-12-2007, 02:02 AM
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Re: regulated return have any real effect on mpg?

I don't think It would improve the MPG.


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post #3 of 12 (permalink) Old 11-12-2007, 08:45 AM
 
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Re: regulated return have any real effect on mpg?

I've heard some say it will, be removing the air that is otherwise in the fuel system. One guy said he got something crazy like 6mpg improvement, which is a stretch for me to believe.
I do think it could help though. Would be a very interesting test.
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post #4 of 12 (permalink) Old 11-13-2007, 02:07 AM
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Re: regulated return have any real effect on mpg?

with the air dog that the OP has the reg return won't have any effect on the air in his fuel.That is what I always thought the reg return did is remove the air and that was it.


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post #5 of 12 (permalink) Old 11-13-2007, 04:47 AM
 
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Re: regulated return have any real effect on mpg?

The airdog might remove entrained air from the fuel before it gets pumped to the engine, but the turbulence and flow limitations of the dead head design are still going to aerate the fuel, aren't they?
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post #6 of 12 (permalink) Old 11-13-2007, 04:48 AM
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Re: regulated return have any real effect on mpg?

if there is no air to aerate how is that possible?


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post #7 of 12 (permalink) Old 11-13-2007, 05:01 AM
 
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Re: regulated return have any real effect on mpg?

The turbulence in the head, and the design of the fuel system causes the aeration, not the air in the fuel itself.

Entrained air and
Aeration are two different things

You can strain all the air out of it you want, and start shaking it and and frothing it around, and it's going to foam up.

The foam is air bubbles in the fuel.
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post #8 of 12 (permalink) Old 11-13-2007, 05:03 AM
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Re: regulated return have any real effect on mpg?

How come the fass and airdogs where design for dead head fuel systems in mind?


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post #9 of 12 (permalink) Old 11-13-2007, 06:33 AM
 
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Re: regulated return have any real effect on mpg?

Don't know
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post #10 of 12 (permalink) Old 11-15-2007, 03:33 AM
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Re: regulated return have any real effect on mpg?

Fuel economy improvements SOMETIMES occur with regulated return installs, but they are NOT the primary purpose for installing one. If MPG is your main reason for doing fuel system mods...don't. If you are interested in making the truck run better, supporting other power mods, etc...then do it. If you get a MPG gain, be pleasantly surprised...if not, don't be disappointed.

The AirDog was not designed for any particular fuel system design. It was designed for Diesel Pickup Trucks, and it's sole purpose is the removal of air. It doesn't care if the system is deadhead or return style...it just does it's job.

Dennis Schroeder - Co-Owner of Strictly Diesel

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