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Thread: What happens to my existing tune when I upgrade to the 2.5 bar custom OS?

  1. #1
    Advanced Tuner Justinjor's Avatar
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    What happens to my existing tune when I upgrade to the 2.5 bar custom OS?

    I'm on the verge of pulling the trigger to upgrade my E38 to the 2.5bar map, mainly for the increased clarity in the maf in addition to the built-in VE table.

    What happens to my existing tune when I upgrade the OS?

    Do the existing values automatically flow to the correct locations or will I need to double check everything?

    Since the maf has more cells and more clarity, what happens to the sections that previously had no value in the original OS? Are they left as blank spots for me to go in and interpolate?

    I'm ready to upgrade, but I want to make sure I understand what's going to happen when I do.
    2020 Mustang GT Daily driver
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    2014 Mustang GT
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    6.87@200mph

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  2. #2
    Advanced Tuner vette_c6's Avatar
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    everythinng will extend ,, you will have Ve table 0
    you need to do it manual

    specialize in: V8 Tuning (Kuwait)
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  3. #3
    Advanced Tuner Justinjor's Avatar
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    So my maf and everything will transfer over, and I'll have blank spots where there wasn't a value previously? I'll leave the VE out for now, I just want to make sure I'm in the same starting place as the original os
    2020 Mustang GT Daily driver
    |Hellion Sleeper|10R80|Full weight, full exhaust, BABY seat in the back|
    8.3@167mph

    2014 Mustang GT
    |Hellion TT|Powerglide|Ignite114|
    6.87@200mph

    Jordan Performance and Racing

  4. #4
    Advanced Tuner Justinjor's Avatar
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    If my maf looks like this with the original OS

    500hz 1000hz 1500hz
    1.5.....1.6......1.8

    It will look like this when I upgrade?


    500hz 750hz 1000hz 1250hz 1500hz
    1.5...............1.6...................1.8
    2020 Mustang GT Daily driver
    |Hellion Sleeper|10R80|Full weight, full exhaust, BABY seat in the back|
    8.3@167mph

    2014 Mustang GT
    |Hellion TT|Powerglide|Ignite114|
    6.87@200mph

    Jordan Performance and Racing

  5. #5
    Advanced Tuner vette_c6's Avatar
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    shot me with your file and i will 2.5 bar for u ,, and u will have a look

    specialize in: V8 Tuning (Kuwait)
    Abdullah Al-najdi
    00965 99369929
    www.youtube.com/alnajdi83
    Tuners ! Quit Raping your PE TABLE !
    instagram : alnajdi83
    best number in 1/8 mile 4.54 ( My Driving + My Tune ) !

  6. #6
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    Bill@HPTuners's Avatar
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    why not apply it to see what it does? Doesn't cost any credits to apply the custom operating system to the file, then you can look it over, play around with it, ask educated questions, etc. before committing any credits to it. It would take you far less time to apply it and look over the file than it would for use to run through each and every thing that gets changed in the file
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  7. #7
    Advanced Tuner Justinjor's Avatar
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    I wasn't aware you could do that. It's not the credit cost I'm worried about as I only tune my car, and I still have the 8 credits that came with it. lol I just didn't want a headache on my hands, that's all.
    2020 Mustang GT Daily driver
    |Hellion Sleeper|10R80|Full weight, full exhaust, BABY seat in the back|
    8.3@167mph

    2014 Mustang GT
    |Hellion TT|Powerglide|Ignite114|
    6.87@200mph

    Jordan Performance and Racing

  8. #8
    HP Tuners Support
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    Bill@HPTuners's Avatar
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    yeah just save it as a different file name so you don't write over your stock or current tune and you'll be fine.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  9. #9
    Advanced Tuner vette_c6's Avatar
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    bill
    let the guy enjoy life


    here you go ,,, 2bar OS :d

    have a look
    but you dont need it

    specialize in: V8 Tuning (Kuwait)
    Abdullah Al-najdi
    00965 99369929
    www.youtube.com/alnajdi83
    Tuners ! Quit Raping your PE TABLE !
    instagram : alnajdi83
    best number in 1/8 mile 4.54 ( My Driving + My Tune ) !

  10. #10
    Advanced Tuner Justinjor's Avatar
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    I guess what I'm having trouble wrapping my brain around is this:

    Are the individual tunes saved in a given OS format? If I have different tunes saved from when I originally tuned the car, and then I upgrade to the 2.5 OS, what happens when I try and open the original tunes? Meaning, do I download and install a new software on my computer when I upgrade or does it just unlock different features?

    I don't think I'm explaining my thought process very well as it's late in the day so please excuse my ignorance.
    2020 Mustang GT Daily driver
    |Hellion Sleeper|10R80|Full weight, full exhaust, BABY seat in the back|
    8.3@167mph

    2014 Mustang GT
    |Hellion TT|Powerglide|Ignite114|
    6.87@200mph

    Jordan Performance and Racing

  11. #11
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    I just did the same upgrade. Like Bill said, just make a copy of you tune and apply the 2.5 bar to it. Then you can use the compare feature to make sure everything is good. You can play with it, make changes or whatever you want. You only need the credits to load it to the car. The 2 bar is the same as any other tune, and works just the same in hptuners. No changes needed.
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  12. #12
    Advanced Tuner Justinjor's Avatar
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    Ya, I went ahead and just went with it last night. So far so good. My E38 already had 15k maf hz range so I didn't have to do anything to it. I just grabbed a base VE table and interpolated the missing cells.

    For some reason, I was thinking I would have to install a new version of the HPT software on my computer, but that is not the case. I can open up both old and new files side by side and double check everything.

    Thanks again for the support.
    2020 Mustang GT Daily driver
    |Hellion Sleeper|10R80|Full weight, full exhaust, BABY seat in the back|
    8.3@167mph

    2014 Mustang GT
    |Hellion TT|Powerglide|Ignite114|
    6.87@200mph

    Jordan Performance and Racing

  13. #13
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    I've been thinking about doing the same thing after I get the car's tune nailed down a bit better. Too bad there is not a guide anywhere that would walk a person through this process. Just a guess, but I think I could probably transpose a Blucat generated VE table from my existing tune into the 2.5 bar OS??

  14. #14
    Advanced Tuner Justinjor's Avatar
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    Upgrade to the new OS was seemless. All the VE tables were blank so I had to create them. I believe you can generate a table in the bluecat tool with your defined parameters and then just copy/paste them into the upgraded OS. There is more clarity in the upgraded OS so you'll have some holes but the interpolate function takes care of that.
    2020 Mustang GT Daily driver
    |Hellion Sleeper|10R80|Full weight, full exhaust, BABY seat in the back|
    8.3@167mph

    2014 Mustang GT
    |Hellion TT|Powerglide|Ignite114|
    6.87@200mph

    Jordan Performance and Racing

  15. #15
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    What about the MAP? Doesn't that need to be re-scaled as well, if staying with the stock sensor? I think I read that somewhere, or something to that effect. I'm not real sure what it means exactly.....

  16. #16
    Advanced Tuner Justinjor's Avatar
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    I'll have to look at it tonight. I know the VE had 15,21,26,32 for the kpa measurements and the new VE has 15,20,25,30,35,40 etc so there was more clarity. I haven't tried to fire the car up yet so I'm not sure if it's a problem.

    I might be wrong, but the new map sensor just extends the range, it does not increase the clarity so there is no adjustment needed. My VE table looks goofy because I didn't fill in the values above 105kpa since I'll never see boost or anything. I'm not sure if this will cause an issue but I'll mess with it tonight to see.

    Or maybe someone else can chime in on things I'll need to adjust with the new OS.

    To recap: my maf was fine, same before/after
    Created a new VE table
    Adjusted the fan settings
    Everything else was left alone
    2020 Mustang GT Daily driver
    |Hellion Sleeper|10R80|Full weight, full exhaust, BABY seat in the back|
    8.3@167mph

    2014 Mustang GT
    |Hellion TT|Powerglide|Ignite114|
    6.87@200mph

    Jordan Performance and Racing

  17. #17
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    Unless you are using a 2Bar Map I believe you will need to change Map settings in Engine Diag though?

  18. #18
    Advanced Tuner Justinjor's Avatar
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    I'll have to look at that when I get home tonight. Thanks for the heads up. I assume I just copy back the values from my original tune and apply them to the new OS?
    2020 Mustang GT Daily driver
    |Hellion Sleeper|10R80|Full weight, full exhaust, BABY seat in the back|
    8.3@167mph

    2014 Mustang GT
    |Hellion TT|Powerglide|Ignite114|
    6.87@200mph

    Jordan Performance and Racing

  19. #19
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    Appreciate you taking the time to detail this process. I still need to work the higher / lower VE quadrant cells when I have time to get the car to a dyno. I'd rather just work with a table than fuss around Blucat tool when paying $150 an hour for the dyno.....
    When arguing with an idiot, make sure he isn't doing the same thing....

  20. #20
    Advanced Tuner Justinjor's Avatar
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    Agree 100%. The upgraded OS works really well from what I could tell playing with it for a few hours. I'll just have to go back and revisit the map settings.
    2020 Mustang GT Daily driver
    |Hellion Sleeper|10R80|Full weight, full exhaust, BABY seat in the back|
    8.3@167mph

    2014 Mustang GT
    |Hellion TT|Powerglide|Ignite114|
    6.87@200mph

    Jordan Performance and Racing