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Thread: GEN 3 PCM Siemens Deka 80lb Hp Tuners calibration

  1. #1
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    GEN 3 PCM Siemens Deka 80lb Hp Tuners calibration

    Hi,
    I have long 80lb Siemens DEKA FI114992 injectors. I've been having issues with the mixtures being really rich at idle on my LS1 engine with LS6 heads and a newer LS6 camshaft.

    This happens even when using the calibration data verified to be correct here (siemens deka 80 injectors.xls).

    When I switched to the calibration data from AAcorvette's website (80LB Siemens Deka-LS1 Style-HP Tuners format.xlsx), the engine ran slightly better.

    How can I know if the injector data is now correct?

    80LB Siemens Deka-LS1 Style-HP Tuners format.xlsxsiemens deka 80 injectors.xls
    Attached Files Attached Files

  2. #2
    Tuning Addict blindsquirrel's Avatar
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    Posting the tune file would be a good start, I guess.

  3. #3
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    I apologize, this HP Tuners is very new to me.

    This includes the calibration file recommended on this site
    eka.hpt


    And here is the calibration file downloaded from the AA Corvette site. And this works better yet
    ehk?s??t?.hpt
    Last edited by kaizen; 4 Weeks Ago at 09:37 AM.

  4. #4
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    The "ekt.hpt" file uses converted Ford data. It's more accurate than the AACorvette data. In that file you need to go to Fuel>Transient>Min Fuel Mg to 0.010 and set >Fuel Delta Min Incr to 0.

  5. #5
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    Quote Originally Posted by SiriusC1024 View Post
    The "ekt.hpt" file uses converted Ford data. It's more accurate than the AACorvette data. In that file you need to go to Fuel>Transient>Min Fuel Mg to 0.010 and set >Fuel Delta Min Incr to 0.
    That still runs way too rich

  6. #6
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    If it was "tuned" using "incorrect" injector data, it will have to be retuned using the corrected injector data.

  7. #7
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    The settings should be stock LS1, with only the injector data changed.

    With the AA Corvette injector data, the idle mixture was slightly leaner. Could it be that those injectors actually flow more than claimed?
    I tried adjusting the mixtures to be leaner through the idle Airflow, but it didn't seem to have any effect.
    Last edited by kaizen; 4 Weeks Ago at 11:26 AM.

  8. #8
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    Do the data like I said and retune. It'll work.

  9. #9
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    I don't know what I'm doing wrong, but when I try to adjust the idle to lambda 1 with the VCM scanner in Openloop mode, the engine idles poorly. It works well at lambda 0.8.

    And it's the only place where I can make the mixture leaner. I have tried adjusting the VE table and MAF scaling, but the mixture doesn't get leaner. What I have noticed is that the injector pulse width doesn't go below 1.6-1.7ms.
    With AA Corvette injector data, the engine idles slightly better at lambda 1.

    In this case, I tried to adjust the minimum injector pulse and minimum fuel milligrams from 0.010 to 0.002, but these also did not seem to have any effect.
    Attached Files Attached Files
    Last edited by kaizen; 4 Weeks Ago at 05:57 AM.

  10. #10
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    Are you running a vacuum-referenced reg or non (corvette style)?

  11. #11
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    fuel system is stock gen4 f body, it does not have vacuum fuel regulator

  12. #12
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    are you tuirbo or SC ?

    why the deka 80s on this engine?

  13. #13
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    Quote Originally Posted by bk2life View Post
    are you tuirbo or SC ?

    why the deka 80s on this engine?

    No, it is naturally aspirated, 80lb injectors because I was told by a tuning shop that those should work in the engine without any problems and those injectors were easily available.

  14. #14
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    Quote Originally Posted by kaizen View Post
    I was told by a tuning shop that those should work in the engine
    id pull those and install these, actual factory GM injectors that all the data for them is easily found here in this forum.
    https://www.ebay.com/itm/274424906026

  15. #15
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    Probably a good idea downsizing injectors to Gen IV GM.
    https://forum.hptuners.com/showthrea...l=1#post766924
    https://forum.hptuners.com/showthrea...l=1#post745108

    I noticed a large B1/B2 imbalance.

    Also, not sure how you're adjusting VE and expecting results without the MAF failed.