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Thread: Speed Density tuning problems

  1. #1
    Potential Tuner
    Join Date
    Nov 2022
    Posts
    4

    Speed Density tuning problems

    Hey guys,
    I have a 07 5.3 l with Long Tube headers, truck norris cam .553 107.5 LSA, new springs, rods, lifters, a valve job, and k&N cold air intake. I am in the process of speed density tuning and the vehicle will not idle worth a crap. Runs well with the maf. Can someone check out my tune and log and see if they can see anything out of the ordinary. I have been working on this for quite some time now and am hoping to finally be able to us it this weekend. This is my first vehicle tune so I am fresh. Thanks23-04-26 16-20-10.hplVVE Tune.hpt

  2. #2
    Tuning Addict
    Join Date
    Jan 2015
    Location
    Franklin, NC / Gainesville, Ga
    Posts
    6,822
    A few things just from what little I glanced at.

    Timing is at 0 to (-1) at idle and torque is through the roof. Could be because the VE table has weird spikes around the idle area or it's the map side of the torque model - not seen one that bad before? Vacuum leak? Low fuel pressure?

    Trims are out bad bank to bank - O2's hooked up right? Not swapped? Could be because of the above stated, but again - not seen it out that bad before... All cylinder's firing - can use temp gun for clarification after cold start.
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

    ~Greg Huggins~
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