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Thread: Question on Tuning with AutoVE tutorial

  1. #1
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    Default Question on Tuning with AutoVE tutorial

    I've went the the whole process now and must admit my AFR is now getting close to commanded and my idle problems seem to have gone away.

    My question is about using the MAP Averages to tweak the VE table. The manual says to repeat as necessary till the averages are right around 1 everywhere. I made another 30 minute log while runing my modified Original Tune per the manual, Original_Tune_0000.tun and am thinking I need to adjust my VE table with the logged BEN Map to keep tweeking it till just right. I have questions about this process. If you look at my BEN Map below for the 4000 rpm range, all the average values are 1.0. So when multiplying, nothing should change. That is not the case. If I copy with labels, then paste > paste and multiply with labels, the 4000 rpm range does change as do many other cells that have no values in them. I've also shown the before I paste VE table then the after I paste VE table from the multiplied values of the BEN Map. What am I doing wrong here? The changes should be very subtle as most of my average values are already 1.0.

    Also notice the 4 cells for MAP 15 and RPM 2800 to 4000. Those cells are so high that they take the VE table cells thru the roof.
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  2. #2
    Lifetime Member mr.prick's Avatar
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    open the map's properties and increase the precision on the data tab.
    you will see that 1.0 is not equal to 1.
    512k RoadRunner Firmware 12.14R
    FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
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    Lifetime Member 5.7ute's Avatar
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    You need to up the precision in the map to at least 2 decimal places. Using only the 1 decimal point you will not see the 2% variation from 1.0 that you are after.
    Click on edit map properties, hit the data tab & change precision to 2.
    As for the low map areas that are reading high these need to be filtered out. It will be due to DFCO becoming active & giving you an extremely lean reading.
    The Tremor at AIR

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    Quote Originally Posted by 5.7ute View Post
    You need to up the precision in the map to at least 2 decimal places. Using only the 1 decimal point you will not see the 2% variation from 1.0 that you are after.
    Click on edit map properties, hit the data tab & change precision to 2.
    As for the low map areas that are reading high these need to be filtered out. It will be due to DFCO becoming active & giving you an extremely lean reading.
    Ahhhh, after changing the precision to 3, I can now follow the calculations. Thanks for that guys.

    Now, should I apply this to my VE table and flash it up, then drive and log some more? What about those 4 really high cells? Ignore them? what caused that?

    Ken . . .
    2001 Corvette Z06

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    Lifetime Member 5.7ute's Avatar
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    Quote Originally Posted by kwhiteside View Post
    Ahhhh, after changing the precision to 3, I can now follow the calculations. Thanks for that guys.

    Now, should I apply this to my VE table and flash it up, then drive and log some more? What about those 4 really high cells? Ignore them? what caused that?

    Ken . . .
    Have you applied a filter set to the data log? If yes what are your filters? Do you lift your foot completely off the throttle to deccellerate?
    Without seeing your log file I can only guess.
    The Tremor at AIR

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    Lifetime Member mr.prick's Avatar
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    It depends on whats going on there and what the cell count is.
    It looks like either DFCO is on or you need a little more fuel when
    the throttle is snapped closed.
    I always ignore that area because usually I hit there when the throttle slams shut
    coming out of PE and the cell count is low.
    If that is throttle closed decel with DFCO off I would add a little bit of fuel there.
    You should not have holes or peaks there.

    Also the cells in the top right corner look like you turned off the car before stopping the log, exclude RPM less than 400RPM to your filter.
    512k RoadRunner Firmware 12.14R
    FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
    LC-1 WBO2

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    Quote Originally Posted by 5.7ute View Post
    Have you applied a filter set to the data log? If yes what are your filters? Do you lift your foot completely off the throttle to deccellerate?
    Without seeing your log file I can only guess.
    Yes, I filtered the low temp and under 50 cell counts out like in the tutorial.

    When slowing down fast in traffic I lift completely and go clutch. Oh, and I've also have been practicing some heel toe blips ( gotta work on the driver too ) I put my log in if you want to open it.
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    Quote Originally Posted by mr.prick View Post
    Also the cells in the top right corner look like you turned off the car before stopping the log, exclude RPM less than 400RPM to your filter.
    Right you are sir. You're like a visionary. I'll exclude them.
    2001 Corvette Z06

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    Argghh, wish I could figure out how to turn that signature off by default

  10. #10
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    Quote Originally Posted by mr.prick View Post
    It looks like either DFCO is on or you need a little more fuel when
    the throttle is snapped closed.
    DFCO comes on in those ranges from .8 up to 1.5
    2001 Corvette Z06

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