Results 1 to 11 of 11

Thread: 2015-2017 F150 5.0L air model

  1. #1
    Potential Tuner
    Join Date
    Feb 2019
    Posts
    5

    2015-2017 F150 5.0L air model

    What is the proper way to setup the air model 15-17 f150 speed density system when installing a supercharger and using a 3 bar map sensor
    in place of a 1 bar sensor any help would be appreciated

    Thanks in advance

  2. #2
    HPT Employee Eric@HPTuners's Avatar
    Join Date
    Oct 2007
    Location
    Crawfordville, FL
    Posts
    2,409
    Update the MAP Slope and Offset for the sensor, dial in the Speed Density using the SD Calculator.
    Eric Brooks
    HP Tuners, LLC

  3. #3
    Senior Tuner CCS86's Avatar
    Join Date
    Nov 2017
    Location
    Austin
    Posts
    1,089
    Are they purely speed density, no MAF?

  4. #4
    Potential Tuner
    Join Date
    Feb 2019
    Posts
    5
    That is correct purely speed density no MAF

  5. #5
    Potential Tuner
    Join Date
    Feb 2019
    Posts
    5
    Ok when using the sd calculator at 22.9 inhg fuel trims are -28 in the calculator I highlight 22.9 from 500-6250 rpm multiply by .90 and then hit airflow coefficients
    and the retest I still have -28 fuel trim an I using the calculator correctly?

  6. #6
    Senior Tuner CCS86's Avatar
    Join Date
    Nov 2017
    Location
    Austin
    Posts
    1,089
    Interesting.

    Do you have experience driving / tuning both SD and MAF Coyotes? I'm really curious to hear the differences.

  7. #7
    Senior Tuner veeefour's Avatar
    Join Date
    Oct 2016
    Location
    Poland
    Posts
    1,711
    2015 S550 V6 is also MAP controlled - we did a custom single turbo recently. Tuning MAP for boost is way more friendly.

    We tuned a 2014 V6 turbo as well which is MAF controlled. Not sure why Ford went MAP in N/A engine but it's good actually.

    Clipboard01.jpg
    Last edited by veeefour; 07-12-2019 at 02:01 PM.

  8. #8
    Senior Tuner CCS86's Avatar
    Join Date
    Nov 2017
    Location
    Austin
    Posts
    1,089
    Interesting for sure.

    I have my MAF based '12 VMP Gen II Coyote running really well these days, but it took a ton of work. My TB tables look nothing like OEM ones, because it's the only way I have found to describe the characteristic change in TB opening to MAF flow, that happens when the bypass closes. Feels like I could have gotten here with SD a lot faster.

    Check out this roll on transition: (WOT start/end 595/600, this is all DD driven)

    Roll-on2.jpg
    Last edited by CCS86; 07-12-2019 at 02:16 PM.

  9. #9
    Senior Tuner veeefour's Avatar
    Join Date
    Oct 2016
    Location
    Poland
    Posts
    1,711
    SD calc in editor is limited and SD model is limited as well - it won't accept certain values. MAF is not really the best sensor to control boost and those cars were not even intended for boost.
    You will never make it run like OEM because it lacks a proper MAP sensor. SD model is not perfect either - works well for stock N/A car tho - you can actually take the MAF connector out and it runs perfect.
    Most of the time SD model needs zero changes for higher boost - just expand your range and move on because ford already did the job.

  10. #10
    Senior Tuner CCS86's Avatar
    Join Date
    Nov 2017
    Location
    Austin
    Posts
    1,089
    I had to make extensive SD changes to get calculated MAP tracking accurately with actual MAP, both in boost and in vacuum.

  11. #11
    Potential Tuner
    Join Date
    Feb 2019
    Posts
    5
    Thanks for your help guy's the problem I'm have is the area 18.4 and 22.9 inhg is very rich fuel trims long trims are -28 and short trims are -28 all other areas are
    good any suggestions?