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Thread: Timing and fuel trim

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  1. #1
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    If you want them at -5 to 0, then I'd say +5 is high. I was just comparing to my logs and based on mine, +5 is high.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  2. #2
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    Quote Originally Posted by pl4yboy View Post
    If you want them at -5 to 0, then I'd say +5 is high. I was just comparing to my logs and based on mine, +5 is high.
    I guess it depends on what you're comparing it to then, right, cause i'm comparing it to 25+.
    If you get your ltrims at 0, then i guarantee you at one time or another , your ltrims are positive.
    Ltrims are meant to go up and down and adjust, you just can't help it.

    Just like KR is normal under certain conditions.

  3. #3
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    But if your Ltrims average at +5 or +6, it's pretty possible they'll hit +10... which is a lot higher than -5...

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  4. #4
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    Ive always heard that ls motors love 13.1 far in pe mode. Is that not right?

    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

  5. #5
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    Quote Originally Posted by o2camaross View Post
    Ive always heard that ls motors love 13.1 far in pe mode. Is that not right?
    ya, i'd say that's a good a/f to shoot for. what do you have that ls3 set at in your sig?

  6. #6
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    It's a stock tune other than a few Dtc's disabled and tm removed. I want to get a wideband before I start tuning it

    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

  7. #7
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    May 2009
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    Got my wideband in today.... idle/ cruising I'm around 13.6-13.8 at wot, 11.9-12.3


    thoughts?
    blown transmissions are about as useful as 97% of the guys on this forum

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