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  •  » MAF Placement

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    1/11/2021 8:39 PM  #1

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
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    MAF Placement

    Does the MAF have to be located before the throttle body?

    To me, it would measure the same amount of air being consumed by the engine.

     

    1/12/2021 5:38 AM  #2

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,502

    Re: MAF Placement

    Yes, it does.  That's where its located in every OE application.  I get the idea that air drawn across the sensor is air drawn across the sensor, but behind the throttle blades is an area of turbulent air, and would make accurate readings impossible. 

     

    1/12/2021 7:49 AM  #3

    Bullet Bob
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    From: Montrose, Colorado
    Registered: 4/01/2013
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    Re: MAF Placement

    Even clocking can disrupt proper air metering in the MAF.  Ford also used a screen on the intake side of the MAF to help evenly distribute the air flow on some applications.  I've talked to folks who report just clocking the MAF 90 degrees made significant improvement in idle or other parameters.

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    1/13/2021 3:56 PM  #4

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
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    Re: MAF Placement

    Is there a minimum length the intake assembly has to be?
    Just kicking ideas around.

       •Thread Starter
     

    1/13/2021 4:16 PM  #5

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
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    Re: MAF Placement

    I don't think its critical.  That said I wouldn't put the MAF right on the end of the TB.  It wasn't uncommon to move the MAF with some of the 5.0 intake setups.  It was always right behind the airbox/air intake though, so I think I'd keep it in that location. 

     

    1/13/2021 4:20 PM  #6

    Nos681
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    From: Atlantic Mine, Michigan
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    Re: MAF Placement

    Only thing I ran across was to NOT place before a 90 deg elbow.

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    1/13/2021 4:42 PM  #7

    Raymond_B
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    From: Fort Worth, TX
    Registered: 4/01/2013
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    Re: MAF Placement

    I'd give it some length of tube before the throttle body, I think it might give some weird readings directly on it.

     

    1/13/2021 4:44 PM  #8

    50vert
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    From: QLD Australia
    Registered: 4/01/2013
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    Re: MAF Placement

    MAF needs to be in front of the air intake for the the PCV, so that all the air going through the engine is metered.

    "Those telephone poles were like a picket fence"
     

    1/13/2021 4:54 PM  #9

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
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    Re: MAF Placement

    Nos681 wrote:

    Only thing I ran across was to NOT place before a 90 deg elbow.

    Interesting, because most CAIs have a 90 coming right off the TB.  The MAF is a good ways downstream of the 90, but there's a 90 there nonetheless. 

     

     

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