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Thread: Mustang GT 2006 Automatic with Roush M90 ----------> MAF Transfer for Ford Racing CAI

  1. #1
    Tuner in Training
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    Jul 2019
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    Mustang GT 2006 Automatic with Roush M90 ----------> MAF Transfer for Ford Racing CAI

    Hello guys, I would like to know if someone can give me a MAF transfer function for a stock Roush Mustang (2006 automatic with a M90 supercharger) to adapt the Ford Racing CAI from a 2008 Bullitt?
    I have tried using it without MAF transfer, but I'm getting huge fuel trim values.

    This one I mean:

    67015d1228573732-ford-racing-bullitt-cold-air-kit-filter-bucket.jpg




    I also would like to get an original Roush automatic tune from 2006, I think my tune was modified by the previous owner.
    For anyone how is interested in my current tune, this was programmed in the us before the car was shipped to Germany in 2010, I have attached it to his post.



    Thanks in advance,

    greetings from Germany,

    Tim
    Attached Files Attached Files
    Last edited by Sprudel; 07-18-2019 at 09:59 AM.

  2. #2
    Advanced Tuner
    Join Date
    Mar 2019
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    350
    Why not just tune the maf yourself? Should be pretty quick. Plot STFT on a graph of engine speed vs Maf V (sensor), use the values in your tune for the axis.

  3. #3
    Tuner in Training
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    Jul 2019
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    20
    So, if the STFT is let's say +5% @ MAF 200 g/s.

    I would correct it like this:

    STFT +5% means the MAF measurement ist too low, so 200 g/s +5% = 220 g/s would be the correct value.

    Is this correct?
    Last edited by Sprudel; 07-18-2019 at 12:10 PM.

  4. #4
    Advanced Tuner
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    Mar 2010
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    New Orleans, LA
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    correct

    however, it is best to use maf counts or maf voltage as that is the actual variable your adjusting for. What I recommend is simplifying the maf transfer down to easily obtainable whole numbers see example below and then holding each maf count or maf voltage stable as long as you can to get an accurate correction.

    setup the maf voltage points in the maf transfer like so

    volts column only
    5.12
    4.75
    4.5
    4.25
    4
    3.75
    3.5
    3.25
    3
    2.75
    2.5
    2.375
    2.25
    2.125
    2
    1.875
    1.75
    1.625
    1.5
    1.375
    1.25
    1.125
    1
    .875
    .75
    .625
    .500
    .375
    .25
    0

    for ad counts multiply those values by 200

    then simply setup a histogram using fuel trim math ltft+stft and no columns with thr rows being maf voltage or maf counts scaled how you have your transfer setup

    of course this will only let you dial in the maf down low and wont give you any wot corrections but you can get the maf dialed in using closed loop and extrapolate the higher points to give you a good starting point. Then simply use your wideband to correct the curve up top at wot.