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Thread: Recently tuned by professional; looking for feedback on tune. Stock LS3 w/IHE.

  1. #1
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    Recently tuned by professional; looking for feedback on tune. Stock LS3 w/IHE.

    Brand new to tuning. Recently installed IHE on my '09 LS3 and paid for a remote tune (no use of wideband) by a well-known, though scarcely reviewed, professional tuner. Just a few questions, 1) is this tune safe and optimal for daily driving, 2) is there any way to optimize this tune further, 3) does this appear to be a high-quality tune? See attached file. Working on uploading a log, but the only log I have does not include LTFTs, just STFTs, so not sure how valuable that is anyway. If a STFT-only log would be helpful, let me know.

    A few things I noticed in the tune after digging in: 1) LTFTs appear to be disabled, 2) this tune appears to be forcing the ECU into MAF only (current dynamic air disable and re-enable are set in the low-100 RPMs), 3) high octane and low octane spark tables are the same. I did observe better and more predictable behavior as far as throttle inputs and response post-tune, but minimal revisions and time spent actually tuning has me concerned about the quality of the tune. Admittedly, time spent tuning is not always the best measure for quality as this guy could really be that good at this.

    Goal(s) here, apart from getting feedback on the quality of the tune, include understanding the methodology of the settings in the current tune and improving my understanding of how I can optimize the tune further. Would it make sense to re-enable LTFTs and further dial in the VVE table and/or MAF?

    Thanks for tolerating my basic questions and looking forward to learning from the community.
    Attached Files Attached Files

  2. #2
    Advanced Tuner dhoagland's Avatar
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    Some will say MAF only is a lazy short cut, some will say its fine, others will say get rid of it and go SD..
    Same with LTFT disable. I've heard that if you have your spark table correct you don't need a low table, I don't necessiarliy agree with that but in theory it works.
    No, I'm not giving you direct answers because there are always variables.

    Every vehicle is a little different and evey tune will vary sightly. Watch the tuners dynoing on utube and see the differences in the tune on different vehicles with exact same mods.

    Reenable LTFT is your choice.
    You can optimize any tune, and should with your own logging and fine adjustments.

    In your position I would log and fine tune the MAF then fail it and tune your VVE...
    Or do them at the same time with one of the methods out there now days.

    Search MAF and VVE at the same time, one example.
    https://forum.hptuners.com/showthrea...-the-Same-Time

    I suggest doing it seperately at first to get use to dealing with each individually and just the tuning in general, the logging adjusting based on the logging, retesting, readjusting, ETC...
    Starting MAF only is the simplest in my opinion
    Last edited by dhoagland; 15 Hours Ago at 08:04 AM. Reason: Added Comment
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  3. #3
    Senior Tuner
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    The only real reason I can think to make the high octane and low octane tables to match is if the tune is in speed density. I would want a difference in those tables if using the MAF.

    It has fairly low timing for what this is.

    I don't like moving the dynamic disable down like that. But there isn't one certified way of doing this. I just don't think people actually understand what that does.
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