1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Reclaiming MPGs on Lifted Expedition

Discussion in '3rd Gen - 2007 - 2017' started by buffy, Mar 4, 2020.

  1. creef14

    creef14 Full Access Members

    Posts:
    159
    Likes Received:
    49
    Joined:
    Oct 11, 2016
    Location:
    Richmond, VA
    I call bullshit...you're claiming a 3+ ton vehicle gets 18 mpg on a very aggressive tune and with added weight? I have a 93 perf tune, and it is anything but efficient. if you're gonna lie at least make it believable and claim to be on a perf/tow or econ tune.

    I def buy the air dam argument over this nonsense
     
    Last edited: Apr 9, 2020
  2. 07navi

    07navi Full Access Members

    Age:
    76
    Posts:
    883
    Likes Received:
    192
    Joined:
    Feb 3, 2020
    Location:
    Mt.Shasta California
    I doubt if air dams increase MPG's much or if at all otherwise the auto makers would put the biggest ones possible on all vehicles.
     
  3. creef14

    creef14 Full Access Members

    Posts:
    159
    Likes Received:
    49
    Joined:
    Oct 11, 2016
    Location:
    Richmond, VA
    Ever heard of the law of diminishing returns? Sometimes there is such a thing as too much of a good thing.

    And almost every auto maker is including air dams on their SUVs and pickup trucks and they have been doing so for at least the last decade. My '03 explorer, my '06 and '17 expedition, my wife's '14 and '17 escapes, her '20 edge ST, my brother's X5 and Silverado all had them as OEM parts. Hell, I think even the mustangs and camaros have them. They're not adding the pieces for fun, especially since most people seem to hate the look of them.

    Here's an article explaining the active air dam on the new Ram trucks ...
    https://www.plasticsnews.com/articl...ctive-air-dams-boost-aerodynamics-on-ram-1500
     
  4. JExpedition07

    JExpedition07 Marinized Member Supporting Member

    Posts:
    5,672
    Likes Received:
    2,506
    Joined:
    Mar 30, 2017
    Location:
    New York
    Air dams suit multiple purposes and while they do save some highway efficiency it’s mostly over many miles and in another turn over thousands of vehicles for the corporate average. My dad took his off the F-250 for his plow frame.....saw a drop of a whopping 0.0 MPG. They help with sound, aerodynamics, etc, they aren’t saving 1 mpg at the pump as claimed here.
     
    Last edited: Apr 9, 2020
  5. 07navi

    07navi Full Access Members

    Age:
    76
    Posts:
    883
    Likes Received:
    192
    Joined:
    Feb 3, 2020
    Location:
    Mt.Shasta California
    There you go...….dams are working. I'm wondering if my 07 Navi ever had one. I just bought it and there are clip holes/mounts at the bottom of the "bumper" for something.
     
  6. MrSticker

    MrSticker Full Access Members

    Posts:
    2,113
    Likes Received:
    883
    Joined:
    May 4, 2016
    Location:
    Upstate, New York
    It's gonna depend on the average driving speed.
    Aerodynamics are a bigger factor as speed increases, adding incrementally.
    Negligible effect under 40 mph (wild educated guess).
     
  7. joethefordguy

    joethefordguy Full Access Members

    Posts:
    311
    Likes Received:
    78
    Joined:
    Apr 10, 2017
    Location:
    Texas
    I have to agree. FWIW, I spotted a trend between that behavior and employers. Bureaucrats, such as government inspectors, were the ones usually mystified by the real world; unable to do anything beyond throwing and parts or components at the problem until it was fixed. The ones that would dig and dig until they found out what was changing expected behavior usually turned out to be on performance pay - that is, either meet a standard or don't get any money. More often than not, that's be a contractor QC type that was being paid my me, not some obscure finance or contracting office in the sky.

    My all time favorite was an HVAC guy who showed us how to reroute our under-floor cable trays so his Air Conditioners could keep our frames within operating temp. Even with a 36" floor, and 4 multi-ton units, we were constantly shutting down for overtemp. He found the problem after a morning of testing, including smoke testing with some fancy doohickey that recorded airflow in real time. Took us the rest of the week to move most of the trays, but it worked the first time. Turned out most of the airflow was just going around the intake vents in the frames. He did tell us he knew that almost as soon as he got there, since the first thing he did was put a hand on an exhaust vent, which of course had almost no air coming out. The rest of the time he was trying to find out where the heck the air was going, and what had to be done to get it to the intakes.
     
  8. joethefordguy

    joethefordguy Full Access Members

    Posts:
    311
    Likes Received:
    78
    Joined:
    Apr 10, 2017
    Location:
    Texas


    PS I was an adjunct professor for years. My screensaver was "I didn't say it was your fault. I said I was going to blame you."
     
  9. 07navi

    07navi Full Access Members

    Age:
    76
    Posts:
    883
    Likes Received:
    192
    Joined:
    Feb 3, 2020
    Location:
    Mt.Shasta California
    YeeeeeOK :33:
     
  10. coupe11

    coupe11 Full Access Members

    Age:
    63
    Posts:
    111
    Likes Received:
    54
    Joined:
    Aug 9, 2019
    Location:
    Virginia
    Some of the techs. I worked with over the years were pretty good.

    Some of them would try something and if it didn't work they remembered it didn't work and years later would speak up and say, "We tried that, it didn't work." But they couldn't tell you why it didn't work.

    The best ones weren't satisfied to "know" something didn't work. They wanted to figure out why it didn't work. They were the best to work with and learn from because they also worked out and understanding of the process and the equipment and how they work together to make product.

    I always got a kick out of telling some guy that something wouldn't work that we were doing it anyway. If he didn't believe me go look at the line and see it running what he said it wouldn't run/make.

    Maybe I have a screwed up personality. I always enjoyed doing thing people told me couldn't be done.
     

Share This Page