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2016+ Toyota Tacoma OVTUNE 1.05 - Tune Development thread

Discussion in '3rd Gen. Tacomas (2016+)' started by OVTune, Jun 9, 2017.

  1. Jun 9, 2017 at 7:58 PM
    #1
    OVTune

    OVTune [OP] Well-Known Member

    Joined:
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    Member:
    #214557
    Messages:
    5,007
    OVTune
    Updated 7/7/2019

    Website info:
    FAQ PAGE
    https://www.ovtuned.com/pages/faq
    FLASH MANAGER PAGE / FLASH MANAGER FAQ / SETUP INSTRUCTIONS
    https://www.ovtuned.com/pages/flash-manager
    INSTRUCTIONS PAGE
    https://www.ovtuned.com/pages/instructions-downloads
    KIT:
    https://www.ovtuned.com/collections/toyota/products/toyota-tacoma-2grfks-calibration

    Our tune kit is designed to work with stock and highly modified Tacoma 3.5L 2GRFKS to reflash the stock ECU for better driving / enhanced response, and more power.

    - Our flash tune reports as "stock" via OBDII
    - Our flash tune (on a stock truck) has been emissions tested
    - Our flash tune has been independently tested and shown to increase MPG on the Tacoma by 2-3MPG on average (91 octane)
    - Our flash tune is tested, developed in house on our 2017 Tacoma 3.5L TRD
    - Our flash tune has ECU protection - You cannot brick or damage your ecu from our software
    Please see our terms and conditions for more information https://www.ovtuned.com/pages/tuning-performance-terms

    Video Guide:




    Information about current GEARLOCKING:




    Current Full tune version: 1.05
    Current Torque converter stutter tune update (Automatic) 1.05.1


    Currently in development: 2.0 EROM, Flash Manager 1.3.0


    EROM 2.0 ( in development )

    Tacoma EROM 2.0 - overview
    - New ignition code -
    IGNITION - EROM Maximum Efficiency
    - New Load code -
    Toyota Load Control - EROM Update
    - Torque- C Complete condensation of all torque tables
    - Throttle update - DBW linearization
    - Shift Control - Complete new shift code
    - Gearlocking - Enable by S mode, no longer enable by ECT
    - Torque converter tables - retune and eliminate slip settings that cause stutter
    -EROM Atkinson 2.0

    - Airflow limits - recalibrated - helps with use of 1000-2500 RPM torque
    - Throttle Airflow conversion tuning, condensation
    - Completely new Valve timing table, coded from scratch, for maximum highway MPG
    Updates going into 2.0 Patch:
    - 87-93 Octane learning code - Patched ignition
    - ACIS Tuning
    - Downshift tables and downshift limit tables update (custom code)

    Gearing
    - 4.88 specific gear tuning
    - 5.29 specific gear tuning (via user submission)
    -5.29 specific speed limitation / shift limitation fix.


    EROM specific custom enhancements -
    New ignition code and patch
    New Load code and patch
    New shift code (upshift, downshift, table limits)
    new torque control code patch (transmission)
    new shift control code patch (transmission)



    DUMP TUBE testing -
    STOCK TUNE VS DUMP TUBE (Catless) with 91, and 93 octane

    91 vs 91.jpg










    Older information - Independent test results / dyno
    (tested on 1.05)
    *****************************************************************

    EXPECTED GAINS WITH OUR TUNE:
    *****************************************************************
    More information de-compiled tomorrow..
    So, to ensure total accuracy with tuning, and dyno accuracy, an indepedent dyno-jet test and tune was performed

    Testing result - As tested
    peak gain / difference of 61 ft lbs @ 4100 RPM
    Peak gain / difference of 47 HP @ 4100 RPM
    Peak Gain @ 6000 RPM of 17 HP



    Indepedent test

    [​IMG]



    [​IMG]
    OVTUNE TEST TRUCK:
    2017 tacoma TRD PRO 4x4 with No engine Modifications and larger tires


    Independent Emissions Test
    (our product is for off-road use, however we value the environment)

    [​IMG]


    [​IMG] [​IMG] [​IMG] [​IMG]


    *******************************************************************
    AUTOMATIC TRANSMISSION:
    Current Version: 1.05 MPG VERSION
    1.05 Release information
    https://www.ovtuned.com/blogs/news/tacoma-1-05-tune-release-information-complete-changelog



    Current version Tune highlights:
    - Throttle control
    - Engine Torque
    - Engine Horsepower
    - Throttle limits
    - Ignition Timing
    - Valve Timing
    - Shift Tables
    - Torque converter lock tables
    - downshift controls
    *****************************************************************
    MANUAL TRANSMISSION:
    Current Version: 1.05B

    Current version tune highlights:
    - All of our 1.05 work above
    - Throttle by gear control tables
    - Throttle torque by gear control tables
    - Throttle limit control
    *****************************************************************




    87 Octane ACIS tuning and Toyota TSB test (to be released in 2.0 EROM)


    Truck testing : 100% Bone stock 2017 Tacoma long bed. No modifications. Stock Tires.
    Testing included :
    - Stock ECU 04B03 (PRE TSB File)
    - STOCK ECU TSB 04B04 ( after seeing this nobody should be on the fence about updating to TSB, even if you're uninterested in tuning )
    - Tuned 04B04 Performance version 87 octane
    (93 octane testing will commence tomorrow)
    - Acoustic Valve Control Tuning - Optimal Torque point.

    (when comparing these results to our test truck, please understand our test truck was tested under Dyno Dynamics wheel measure non shootout mode, which reads considerably lower.)
    These numbers are still accurate and what is expected on a Dyno Jet. NO dyno settings were modified.

    Our Goal: Ensure we can provide the absolute BEST calibration for these trucks possible, even under strict octane requirements. More and more people want performance without paying at the pump. So we sought out to ensure that you are losing nothing by running 87 octane.


    First we began with running 04B03 stock, vs 04B04 Stock.
    We set the truck up on the dyno, and ran 04B03.
    Immediately after we updated the ECU to Toyotas TSB ECU version 04B04 through techstream.
    - The truck immediately picked up a noticeable amount of low end torque and a positive gain or +6 horsepower over 04B03 stock. (note, no changes except updating to 04B04)
    [​IMG]


    Next we sought out to tune the Acoustic Valve control. We all know that sudden "surge" in power about half way through the RPM band. Well this is the Acoustic Valve control activation.
    The ACIS has a 2 phase point, and has more than 1 RPM activation point depending on "low and High" opening / activation.


    First we began by testing some slight RPM adjustments, and were able to eliminate the torque hole where the stock activation takes place.
    [​IMG]

    Through further adjustments we were able to create a torque spike, but this is from a surge in manifold turbulence and you can see the resulting slope and recover afterwards. Not really ideal for tuning or driving.

    [​IMG]

    Finally after multiple tests we found the most IDEAL location (which is NOT stock) to create more torque in the lower RPM while reducing the torque slope after activation.
    You can see below, and we further smoothed this through changes to intake valve timing (which does NOT reduce any torque)
    [​IMG]

    Finally, our resulting changes.
    -04B04 Performance 87 octane with the new ACIS tuned point

    This is a tuned gain with 87 octane that will provide real world results where the truck is driven and needed the most.
    Include gear locking, and you've got more than 50 ft lbs available at 3100 RPM, tested. This is an absolute requirement for anyone who would like to tow WITHOUT having the engine screaming at 5000 RPM.
    (for people who are already on 04B04, testing results ~20-22 ft lbs)
    [​IMG]



    Final result:

    Note-

    This is our 87 octane performance tune vs 87 octane stock tune.
    We get MANY requests about people wanting as much power and response while remaining on 87 octane, so we thought it would be best to give this octane the attention people are requesting.
    As a result we are seeing VERY good gains for 87 octane.
    Through tuning the intake manifold, modifying valve timing to create more torque where more flow is now available via intake manifold runner tuning, we have created even more torque in the low end than EVER before, on 87 octane.

    Results below are how the truck came in (04B03 pre -TSB) To UPDATED 04B04 Tuned 87 octane. This is a massive difference.
    Now the engine is making more than 250 Horsepower, measured at the wheel, from 5200 RPM to 7000 RPM.

    Through extensive testing, and months of development we have found, tested, and ensured we can continue to provide the absolute best, unmatched, calibration for these trucks possible.
    This includes development and testing for things that we had listed to do outside of our 1.05 release,
    - Acoustic Valve Tuning
    - Additional Intake and Exhaust Valve tuning to match new ACIS tuned points
    - Focusing on improving our 87 octane tune
    - Lower RPM torque gains are made NOT through ANY ignition or fueling changes. ONLY through modifications to throttle, torque, and shift limitations.

    [​IMG]

    [​IMG]









    OLD Testing - 1.01 - 1.03



    [​IMG] [​IMG]



    I'd like to give you guys a little explanation on why this takes so much time, and why doing it this way is critical to making it right.
    But first, it is important to understand that yes, this tune is a continued work in progress. Which is why updates, all of them, are free. When writing code, analyzing code in assembly no less, and patching the code to do something different than designed, bugs can happen. They are rare, but can happen. Even the biggest tuning names in this business (EcuTek, Cobb, etc) that write custom code, are not always bug free.
    Limp modes, Engine power loss, throttle loss, etc.. it can happen. I've seen it, tuned it, experienced it on other platforms using custom patches to the ECU (Ecutek for example). That does NOT mean ecuteks software is not amazing, it's the absolute best in the business.
    But as a programmer, you cannot always foresee it before it happens. The code for an engine these days, even with a file as small as 4mb, is unimaginably complex at the assembly level. And that's the only way any of us get to analyze it.
    If a bug is found and it causes less than desirable, or even undriveable results, we are sorry about that, please, please let us know so we can quickly form a solution. I test EVERYTHING on my truck, but unfortunately I cannot test all versions of Toyotas code on my truck. I also cannot afford to go out and buy 10 different versions of this truck. We are in the process of purchasing a MT truck though. Each ECU ID = the code recompiled. Which means that everything is at a different hex address.

    Now to explain why it takes so much time:
    Simply put, the complexity of the entire calibration can only be analyzed through assembly. Take 1.5 megabytes, and analyze it through something only 1 step higher than binary. It's a daunting task. Believe me I know I get too excited at times and post dates that I anticipate getting stuff done, but will be the first to admit I miss deadlines I set. I set these deadlines for a few reasons. I do not delay anything on purpose, there is always a reason.
    1. because of my anticipation of how it will go, without issues. (AKA, it will work this way, will be done by this time).
    2. Me wanting to get it out to you guys and get feedback.
    But as we know and have experience, this trucks code isn't A+B=C. And Only through working deep into the code do we stumble upon something else that takes more time to analyze.
    I have not analyzed the entire code of this ECU yet, even 2 years later, although in the last 6-7 months we have worked through more of it than all the other time combined.

    That's only half the work. After analyzing it, testing it, finding limitations, now comes the harder part. Writing to code to get around it. It NEVER works the first time, and always takes rounds and rounds and rounds of testing, debugging, getting undesirable results, testing again, and reworking the code.
    Then, comes the next part. Converting data. Toyota does not use floating point for these ECUs. So not a single thing in the ECU represents real data. It all must be converted. That's a story for another time, but just know it's time consuming. For example in the ECU "16384" might equal "1.0" and "17256" might actually mean "510" in log-able format. For example the decimal "120" actually means "43.5" in fuel pump PSI.


    why doing it this way is critical to making it right.
    Any tuner with the right software can tune a car. Very, very few tuners can go outside the boundary of that software they are using. I would wager only 1% of the tuners out there can even read or understand ECU code. being bound to that software means that you cannot ever tune something you don't have. A lot of tuners get stuck in this realm. I've been there. Those scenarios create "the best I can make, given the tools I have" type of tunes. Which, aren't always bad of course. Good software = good tune.
    I don't have any, premade software. This isn't a bad thing, because I have studied and learned to read the code, figure out problems on my own. But this also includes to the time consumption part. If I need a table, I have to go find it.
    The reason it is critical to making the tune right, is because while we are slow, we have no boundaries. Which means in the end there is nothing we cannot "tune."
    I fully anticipate, and hope to be, still tuning this truck 10 years from now. I honestly enjoy it. It's a big challenge, very fun, and the community is awesome. Also for the limitations of the truck, it's an awesome truck.

    Thank you everyone.
     

    Attached Files:

    Last edited: Jan 26, 2020
  2. Jun 9, 2017 at 8:17 PM
    #2
    RBfastback

    RBfastback It's Got Electrolytes

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    yeah like selectable modes: tuned, oem, valet, anti-theft
     
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  3. Jun 9, 2017 at 8:26 PM
    #3
    nevadabugle

    nevadabugle Desert Rat

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    Interested. Hope it works for the manual also.
     
  4. Jun 9, 2017 at 8:30 PM
    #4
    Nitori

    Nitori Well-Known Member

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    My body is ready. I'm quite interested to see what you found out, and although I know it is a long shot I hope some of that could pave the way for an OTS tune for the 2.7 2TR-FE.
     
    gavia, CMD-KY, Brice and 2 others like this.
  5. Jun 9, 2017 at 8:34 PM
    #5
    OVTune

    OVTune [OP] Well-Known Member

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    OP will be updated in a moment then I can respond to some questions
     
  6. Jun 9, 2017 at 8:46 PM
    #6
    20tacoma17

    20tacoma17 Well-Known Member

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    Lifted on 275/70/17
    Well if they can add some mpg, fix shift points and throttle response, I'd be in. But if the can squeeze a few extra hp/tq that would be a plus.
     
    speedtre and KTJO 4x4 like this.
  7. Jun 9, 2017 at 8:46 PM
    #7
    FFBlack

    FFBlack Well-Known Member

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    1 moment!
     
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  8. Jun 9, 2017 at 8:48 PM
    #8
    gersus

    gersus Well-Known Member

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    Lil lift, bumpers, SC, UCON, headers, etc.
    I would be hesitant to be a guinea pig. Maybe I'm just jaded by my bully dog experience...
     
  9. Jun 9, 2017 at 8:48 PM
    #9
    20tacoma17

    20tacoma17 Well-Known Member

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    I don't think so, they were talking about this awhile back.
     
    goose443 likes this.
  10. Jun 9, 2017 at 8:50 PM
    #10
    Nitori

    Nitori Well-Known Member

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    My guess is that there's some sort of intermingling with the transmission logic which is why it's so complex.

    +MPG maybe, probably unlikely. The whole reason people are complaining is because Toyota was trying to squeeze every last bit of MPG out to please the EPA.

    Shift points and throttle response though, yes those will almost definitely be a part of this...
     
    Krucen 01, Oldman808 and 20tacoma17 like this.
  11. Jun 9, 2017 at 8:55 PM
    #11
    WOTaco

    WOTaco Well-Known Member

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    My shift points are dead nuts perfect.:burnrubber:
     
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  12. Jun 9, 2017 at 9:00 PM
    #12
    OVTune

    OVTune [OP] Well-Known Member

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    Not at this time. you can select from stock or our adjusted maps, each requires actually flashing the ECU with said map


    We have yet to see a tune be released with the level of torque management detail we have been working on.
     
    Raynord22 and KTJO 4x4 like this.
  13. Jun 9, 2017 at 9:02 PM
    #13
    OVTune

    OVTune [OP] Well-Known Member

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    The complexity is the extreme level of torque management that Toyota implemented into this ECU. the only way to make more power is disregard all the "basics" and focus totally and completely on the torque control tables and calculation tables for "x" result to "y" torque target
     
    Raynord22, KTJO 4x4 and dYL0n like this.
  14. Jun 9, 2017 at 9:04 PM
    #14
    20tacoma17

    20tacoma17 Well-Known Member

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    Lifted on 275/70/17
    So basically what can we expect? Any eta and cost on item?
     
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  15. Jun 9, 2017 at 9:11 PM
    #15
    hiPSI

    hiPSI Laminar Flow

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    So you guys have cracked the Toyota ECU? Or is this a piggyback unit?
     
  16. Jun 9, 2017 at 9:12 PM
    #16
    c4lvinnn

    c4lvinnn Well-Known Member

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    Was going to ask the same thing.

    Also what are torque tables? Is this not a result of throttle, rpm, cam, timing etc in table format?
     
    dYL0n likes this.
  17. Jun 9, 2017 at 9:12 PM
    #17
    oscolivar1

    oscolivar1 Well-Known Member

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    Bilstein 8112/8100, JBA UCAs, Icon RXT leaf pack, work wheels 17x8.5;-10os, 285/75/17 cooper LTX AT3, Mobtown HC rear bumper and Sliders, SSO front bumper, BAMF greceased grill.
    Ecu tunes must be the new cool thing these day, this is out of my realm of knowledge, there is an ecu tune for my audi to go from 350 to 450hp just from a simple ecu tune. I'm usta just adding turbo and supercharger back in my high school days to make real power.

    This will be interesting what you can can provide for us.

    **clicked watch thread
     
    Krucen 01 and dYL0n like this.
  18. Jun 9, 2017 at 9:13 PM
    #18
    c4lvinnn

    c4lvinnn Well-Known Member

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    OV has been around for a few years and have a track record with Lexus and Toyota tunes.
     
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  19. Jun 9, 2017 at 9:24 PM
    #19
    OVTune

    OVTune [OP] Well-Known Member

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    I assure you without a shadow of a doubt we can access your Tacomas ECU..
    I've already done the IS200T, RC200T, RC300/RC350 / ISx etc.
    I was just looking at the LC500 today, that's next on the list and uses the same torque management.

    The next step for us is to get a local Tacoma on the dyno to adjust the torque maps and show the resulting gains. We also have already selected someone on here who will be working with us through the remote tuning process and will explain with the forum the relative process / and how things progress.
    The torque control maps are *literally* identical in layer and nature to another platform that we have already done so I have very confident
     
    KTJO 4x4 likes this.
  20. Jun 9, 2017 at 9:26 PM
    #20
    dYL0n

    dYL0n أنا لست الإسلامي

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    1.04. Kbro2s. ICONS.
    Biggest question:

    Piggy back or ECU flash?

    @OVTune

    I'm doing it reguardless!
     
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