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Thread: Coyote MAF Location/Orientation

  1. #1
    Senior Member mlewis's Avatar
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    Coyote MAF Location/Orientation

    Coyote Installers.

    Looking for some input on the orientation/location of the MAF on the intake tube.

    If I look at the set-up on a Mustang (example attached) it looks like it should be clocked on the side opposite the engine (would prefer to tuck it away on the bottom/back of the intake tube if possible).

    Thoughts ?

    Mustrang MAF.jpg
    Mk4 #9165, Base Kit with lots of options, Delivery on 08/17/2017, Coyote, 2015 IRS, 18" Halibrands, 12.99" Wilwoods

  2. #2
    edwardb's Avatar
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    Are you using one of the Factory Five recommended CAI setups? Their instructions list Spectre and Treadstone Performance. Either are good choices. In both cases the actual location of the MAF sensor is dictated by the MAF tube. It's generally recommended to clock the tube so the sensor is on the outside of the curve. For the setup in the Roadster, that puts the MAF sensor pointing roughly toward the front of engine compartment. I don't know how critical it is, but I followed these recommendations with mine and it seems to work fine.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014.
    Build 2: Mk4 Roadster #7750. Sold 04/10/2017. #7750 Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. 03 of 20. 2015 crate Coyote, 2015 IRS. Legal 04/18/2017. #8674 Build Thread
    Build 4: Gen 3 Type 65 Coupe #59. Gen 3 crate Coyote. Delivered 12/2/2017. #59 Coupe Build Thread

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    Al_C's Avatar
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    I guess there are some things you just take on faith. I still can't understand why it makes a difference which way you put the MAF sensor, but I followed the advice and put mine in as Paul identified. Initially, I had mine on the inside of the curve, and it worked fine there, too. I did have a starting problem which is why I moved it to the recommended location, but as it turns out, my start problem was fuel related, not because of the MAF sensor.
    Mk IV Roadster - #8650 - delivered 7-17-2015 - first start 7-28-2018 - first go-kart 10-13-2018: a work in (slow) progress
    Complete kit / 2015 Coyote / TKO600 / IRS / Wilwood brakes / Mid-Shift mod / Power Steering / Heater and Seat Heaters / RT turn signal / Breeze radiator shroud and mount

  4. #4
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    Quote Originally Posted by Al_C View Post
    I guess there are some things you just take on faith. I still can't understand why it makes a difference which way you put the MAF sensor, but I followed the advice and put mine in as Paul identified. Initially, I had mine on the inside of the curve, and it worked fine there, too. I did have a starting problem which is why I moved it to the recommended location, but as it turns out, my start problem was fuel related, not because of the MAF sensor.
    Air will put more pressure and flow velocity on the outside of the elbow. Inside the elbow can give it a lower than actual reading due to the decrease in pressure at the turn, lower readings thinks its less air entering therefore cutting fuel flow and possible lean condition.

    Disclaimer: this may or may not be true for air but that's how we measure liquid flow here at work.
    If in doubt......flat out-Colin McRae

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  5. #5
    Senior Member BEAR-AvHistory's Avatar
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    Believe TNcoupe is correct. One of our guys was having some issues & they went away when the tube was rotated to put the sensor at the front.
    Kevin
    MKIV #8234
    Coyote '13/TKO-600
    Delivered 2/7/14 - Plate "COYOTE NC1965" 3/25/15

  6. #6

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    Quote Originally Posted by TNcoupe View Post
    Air will put more pressure and flow velocity on the outside of the elbow. Inside the elbow can give it a lower than actual reading due to the decrease in pressure at the turn, lower readings thinks its less air entering therefore cutting fuel flow and possible lean condition.

    Disclaimer: this may or may not be true for air but that's how we measure liquid flow here at work.
    While this wasn't my thread to begin with, I do appreciate the answer!
    Mk IV Roadster - #8650 - delivered 7-17-2015 - first start 7-28-2018 - first go-kart 10-13-2018: a work in (slow) progress
    Complete kit / 2015 Coyote / TKO600 / IRS / Wilwood brakes / Mid-Shift mod / Power Steering / Heater and Seat Heaters / RT turn signal / Breeze radiator shroud and mount

  7. #7
    Senior Member mlewis's Avatar
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    Are you using one of the Factory Five recommended CAI setups? Their instructions list Spectre and Treadstone Performance
    Yes, running a Spectra CAI.

    Thanks all for the responses and background. Make sense. My plan was to mount the sensor in the front, although I was hoping to tuck it away on the bottom to make it look pretty

    Function over fashion.

    Thanks again
    Mk4 #9165, Base Kit with lots of options, Delivery on 08/17/2017, Coyote, 2015 IRS, 18" Halibrands, 12.99" Wilwoods

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