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Thread: 2004.5 LLY Dyno Results

  1. #1
    Tuner in Training
    Join Date
    Nov 2018
    Location
    Aberdeen Washington
    Posts
    42

    2004.5 LLY Dyno Results

    Curious what you guys are getting out of a 100% stock LLY? I was able to get 400hp and 772ftlbs before rail pressure really started to drop off. This is the first Dmax I've tuned (my friends), though I've done lots of common rail Cummins. Exhaust does not smoke once the turbo lights, makes 32 psi of boost, but if I add any more duration rail pressure drops off significantly and power does not increase. I told him its time for a lift pump, ill post the tune and a data log later when get to my laptop. What are the limits of a stock LLY?
    2004.5, built 48re, Fass lift pump, s464 second gen swap, ARP studs, 103# valve springs, 110hp injectors, 566hp 1164ftlbs

  2. #2
    Tuner in Training
    Join Date
    Nov 2018
    Location
    Aberdeen Washington
    Posts
    42
    Here is the tune and the data log. I know rail pressure is low compared to desired, hopefully a lift pump will help that out.
    Attached Files Attached Files
    2004.5, built 48re, Fass lift pump, s464 second gen swap, ARP studs, 103# valve springs, 110hp injectors, 566hp 1164ftlbs