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Thread: lb7 or lbz tune on lly

  1. #1
    Potential Tuner
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    lb7 or lbz tune on lly

    i know the 2 have very different componets but i was wondering what would happen if i try to load a lb7 or lbz tune on an lly, would it work or are the engine values completely different. if i cannot load a tune to an lly can i use the same parameters from a lb7 or lbz to change a lly, i'm new to this and cannot find a good lly tune or anyone to help me out. any help is greatly appericated.

  2. #2
    Tuner in Training
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    Quote Originally Posted by SDimeVortec43 View Post
    i know the 2 have very different componets but i was wondering what would happen if i try to load a lb7 or lbz tune on an lly, would it work or are the engine values completely different. if i cannot load a tune to an lly can i use the same parameters from a lb7 or lbz to change a lly, i'm new to this and cannot find a good lly tune or anyone to help me out. any help is greatly appericated.
    I dont know what it looks like in the machine language side, however all the fueling tables are different for each of these. The LB7 looks like an electronic version of a mechanical injection pump, the LLY adds pre injection events, and the LBZ has more of everything, I doubt the ECMs would even work if you tried. Put it on the "Not Recommended" list in my book.

  3. #3
    Tuner in Training 03 D-max's Avatar
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    No the tunes wont load.
    03 2500hd HPT, PPE, MBRP, K&N, SD
    www.DuramaxDiesels.com

  4. #4
    I have read in MANY places that the LLY is the EXACT same engine as the LBZ, except for a beefier tune.
    So i am curious as to why an LBZ tune would not load onto a LLY or visa versa.

  5. #5
    Tuner in Training 03 D-max's Avatar
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    lly's have different a different turbo, pistons, rods, heads, injectors, transmission, and the list goes on...

    in 06 and 07 gm made some detuned lbz's that they called lly's but that is a different story
    03 2500hd HPT, PPE, MBRP, K&N, SD
    www.DuramaxDiesels.com