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Thread: 93 Octane Use - 8.1L New to me, Time to tune, Been a few years...

  1. #1
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    Default 93 Octane Use - 8.1L New to me, Time to tune, Been a few years...

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ID:	21350Hello All! It's been a few years since my 5.3 and 6.0 tunes and looks like a few new features in 7.5 and V8

    So I have a 2004 Suburban 2500, 8.1L, 4L80E, 265/75/15 Michelins and eFans going in next weekend on modified shroud (factory eFans don't fit this radiator like the 5.3 and 6.0 did).

    Right now I am focused on tuning to run 93, or 91 ethanol free (we have that up north now), and I believe all that modification is done in the Spark->General-> High Octane Tables. Well the ones THAT CAME in this vehicle look very similar to each other, but far from stock? Abuse mode was off, too. There was a "custom lock code" problem getting in to this monster, but V8 let me read it after a few tricks.

    SO, where to begin? I don't expect anything for free, does anyone have a tune they want to sell me to start off with?
    Where have all the Quadrajets gone?

  2. #2
    Joe (Moderator) joecar's Avatar
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    Start by logging a few things, see what is all going on as it runs.

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