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Thread: 1st LNF tune

  1. 01-02-2011 #1
    TurboTBSS
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    1st LNF tune

    Im lost here trying to tune my first LNF. I haven't really been tuning much GM stuff in the last couple years. This little turbo toy is confusing.

    I think I get the Pe table

    lambda = 14.68

    so 14.68 * .76 = 11.2 commanded AFR?


    I have tuned some supercharged cobalts so it isn't all greek. Anyone have something I can look at for a stock car? I downloaded the file in the respository and tried it. It stayed in the 13's on the dyno well into the rpm range and I stopped pulling the car.

    Where do these things like to be air fuel wise? Looks like 10-12 degrees of timing works best at 15++ PSI. If someone can point me in the right direction I would appreciate it.
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  2. 01-03-2011 #2
    Bill@HPTuners
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    on the DI motors a 13:1 afr isn't uncommon.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"
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  3. 01-03-2011 #3
    M-Dub
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    I run my personal LNF car at a 12.6-12.8 or a .88 lambda at WOT I also run 21-22* of timing on pump 93 at 22.5psi!

    Which is all we can do since HPT hasnt' unlocked our wastegate or fuel pressure tables....

    WINK WINK
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  4. 01-03-2011 #4
    shabby
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    This threads should help...

    http://www.hptuners.com/forum/showthread.php?t=26232
    http://www.hptuners.com/forum/showthread.php?t=26756
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  5. 01-03-2011 #5
    Jaxon
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    Stock HHR with 93 octane i was running 22ish boost, holding 19-20 to redline, redline at 7k, and about 18* timing up top.
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  6. 01-04-2011 #6
    TurboTBSS
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    Quote Originally Posted by Jaxon View Post
    Stock HHR with 93 octane i was running 22ish boost, holding 19-20 to redline, redline at 7k, and about 18* timing up top.
    I think I have a half way decent file put together at this point. I downloaded a few histograms and config files. I will continue to play with it. I haven't got it to hold anywhere near 18 degrees up top. 14ish with top tier 93 octane.

    Can you post your file so I can see what I am missing.
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  7. 01-04-2011 #7
    Iam Broke
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    Fuel trims being off causes knock, work on the fuel trims.
    '12 Camaro T3 2SS/RS LS3 M6, SLP TVS 2300, Flex Fuel
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  8. 01-04-2011 #8
    Jaxon
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    I was also running 18* in the summer, winter blends suck. Im running 14* on 24psi right now but I have bolt ons aswell(never tried more than 14* on 93oct) BTW, dont use QT gas, it blows. Its 93 here but I was getting PLENTY of KR on it.
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  9. 01-05-2011 #9
    BackyardTurbo_FTW
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    The tune in the repository is good, I would just change the intake cam warm table to a stock one and then tune the MAF. .88 is a good place to be
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