Jump to content

Highway Mileage Drops With Airaid Mit?

mtsusa

Recommended Posts

mtsusa Enthusiast

mtsusa

Posted
Posted

Greetings, this is my first post here.

 

Anyway I bought and Airaid MIT tube for my 2010 Silverado 5.3 (despite the product description it doesn't interfere with the MAF so it DOES fit the 09-10) and after driving for a number of days I calculated my highway mileage each day (for the same trip to work) to be 22.7-22.8 mpgs. I wasn't impressed so I replaced it with the stock intake tubing and averaged 24.4 mpgs. Any thoughts on this?

 

I have the stock paper filter for now (my truck's only a few months old). Is the factory airbox and intake tubing that well designed that it won't benefit from an aftermarket intake tube?

 

And is the larger diameter intake tubing actually hurting performance with the factory airbox (since it's not letting a greater amount of airflow through)? I was thinking with the same volumetric flow of air in a larger tube, thus lower velocity, there was less of an "induction effect" due to inertia so the engine lost more power at the lower end of the powerband (which is where I typically drive, since at 65 mph I'm at no more than 1500 rpm). I'd appreciate any thoughts/advice on this!

Z45 Senior Enthusiast

Z45

Posted
Posted

The MAF controls the amount of air, not the intake tube. More air means it will need more fuel.

mtsusa Enthusiast

mtsusa

Posted
  • Author
Posted
The MAF controls the amount of air, not the intake tube. More air means it will need more fuel.

 

My reason for mentioning the MAF is that the tube is said to work only in 07-08 models which has a differently designed MAF that won't physically fit in an 09-10 intake. I understand that about the MAF, but better airflow should mean more efficient combustion therefore greater fuel efficiency- less overall power required to do the same amount of work (and yes I am keeping my foot out of the gas!)

 

MANY people report at least subtle gains, though, in fuel economy with the addition of an intake or at least freeing up the airflow by way of replacing the intake tubing?

Wires Enthusiast

Wires

Posted
Posted
The MAF controls the amount of air, not the intake tube. More air means it will need more fuel.

 

My reason for mentioning the MAF is that the tube is said to work only in 07-08 models which has a differently designed MAF that won't physically fit in an 09-10 intake. I understand that about the MAF, but better airflow should mean more efficient combustion therefore greater fuel efficiency- less overall power required to do the same amount of work (and yes I am keeping my foot out of the gas!)

 

MANY people report at least subtle gains, though, in fuel economy with the addition of an intake or at least freeing up the airflow by way of replacing the intake tubing?

 

 

I'd say it was more coinicidence than anything. The smoother intake tube should give more WOT power (probably pretty minor gains though). At the low end, you're not using hardly any of the factory tube (not enough air to fill it). The factory intake track does typically have those weird warts, etc on them to reduce the intake noise.

 

But, if GM could increase their fleet mileage by 1.6MPG like you're seeing, they'd do with an intake fix vs expensive crap like AFM, etc...

 

My 2 cents worth... :)

mtsusa Enthusiast

mtsusa

Posted
  • Author
Posted

Oh I fully agree...I guess I should've stated that I got better highway gas mileage too before putting the aftermarket intake tube on, though. Do all of the air baffles on the factory tubing reduce performance in any way?

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,866
    Total Members
    8,960
    Most Online
    Greg3160
    Newest Member
    Greg3160
    Joined

  • Who's Online   2 Members, 0 Anonymous, 408 Guests (See full list)

  • Latest Articles

  • Posts

    • MANGOAL
      Mangoal or FitcamX OEM Dashcam?

      By MANGOAL · Posted

      Late reply, but yes—it works on the SLT trim. Compatibility comes down to the plastic shroud shape behind your mirror, not the trim badge itself. On the SLT with auto-dimming, it uses a plug-and-play Y-harness off the mirror/rain sensor power, so no need to run wires down to the OBD port. If anyone's ever unsure about fitment, just drop a photo of your mirror housing and we can double-check it.   Appreciate the detailed feedback on the install! On the windshield glare—we actually took feedback like yours and developed a dedicated CPL (polarizer) filter to cut down dash reflections on sunny days. If you're still running the cam, shoot me a DM. I'd be happy to send a CPL filter over for you to test out—no charge. 
    • davester
      2002 GMC Yukon

      By davester · Posted

      There are no stickers in your glovebox?
    • davester
      Weight limit in bed

      By davester · Posted

      Look at the numbers on the stickers in the door jam...
    • EJS2015
      Actual Full Screen CarPlay on Refreshed Silverado/Sierras.

      By EJS2015 · Posted

      Yes, every time the developer updates his code, you must recompile. I will private message you with the latest because it changes pretty much with every version.
    • Grumpy Bear
      Transmission Temperature Hitting 220s

      By Grumpy Bear · Posted

      After I wrote that reply I went for a ride. 85 F out. So trans started at 85 F and it shifted the same as it did an hour latter at 168 F. I've never actually recorded the to cold to shift point but it is under 32 F before they start hanging on to a lower gear or leaving the converter unlocked. Both intended to heat fluid.    Yes, brake or bake. Absolutely.      Your welcome. True research ended decades ago. Field trials are still in play.    There is a thing called oxidation onset temperature. This is the heat related oxidation not the O2 exposure kind. For mineral oil that starts at 140 F. So what happens after 140 F? Each 20 F cuts fluid life in half! Does using a Full Synthetic improve that? Yes! By how much? Depends on the base oil type and a few other factors. But enough to notice. Some esters are even higher. There are even synergies between types the will raise it higher than any one component is alone.    Then there is "Hindered" oils. Antioxidant additives. Hindered Polyol Esters can sit at 500 F for years in a turbine.   When a blender brags his oil will 'take 500 F" in service he doesn't specify for how long. Water will dance on a 500 F hot plate for several seconds. @newdude put up a chart showing the relationship between fluid temperature and it's life in an automatic transmission. Here's a version of that chart for Group III based oils. These temperatures are those in the pan as observed as 'normal'. that is you drive as you do for as long as you do under what load you ask of it and whatever that temperature is this graph applies to. Flash temperatures of a few minutes isn't what his means.    Note that fluids held at a constant 240 F have a service life of only 20K miles. 220 F explains the factory exchange limit, eh? My equipment I keep under 180 F and I'm good if the cooler will hold it as low as 140 F. But that's me.   

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...