Results 1 to 6 of 6

Thread: Speed density Anxiety

  1. #1
    Potential Tuner
    Join Date
    Feb 2019
    Posts
    3

    Speed density Anxiety

    Hi guys,
    New to tuning and trying to make some changes for a camshaft.
    Im getting anxiety here ive watched tons of videos and read the how to's.
    Any changes to the ve table seem to have have no effect on the afr.
    The car seems to be running lean at around 14.5 to 15.8, I even changed the stioch afr down to 12 and still had no effect.
    I bought a ecu with a speed density tune already loaded.
    Wanted someone to look at my tune please to see if I am missing anything.
    I have a wideband o2 installed also.

    Sorry im a complete noob.
    Attached Files Attached Files

  2. #2
    Senior Tuner
    Join Date
    Mar 2011
    Location
    Ripley, MS
    Posts
    1,865
    Try this and see how it does. I just tuned a car with the same base SD file as yours.

    ls1 speed density tune 2.hpt

  3. #3
    Tuner
    Join Date
    Dec 2018
    Location
    Washington State
    Posts
    182
    You need to fail the MAF in diagnostics first 3 to error on first.change your stoic to the appropriate fuel as well.

  4. #4
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,533
    Stoich never changes, it's a set and forget table. The only time it can change is if the vehicle had a flex fuel sensor installed.

    Any fuel changes must be done to the VE table. May want to read up on tuning speed density more.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  5. #5
    Potential Tuner
    Join Date
    Feb 2019
    Posts
    3
    Hey guys thanks for the responses, looks like my wideband is faulty, got a new one coming so all should be sweet..

  6. #6
    Tuner in Training Ace4045's Avatar
    Join Date
    Sep 2018
    Location
    Tennessee
    Posts
    19
    Changes made in your VE table won't affect AFR as you still have LTFT and closed loop enabled.
    2004 Tahoe 4.8L Vortech Blower 12psi TBSS Intake
    http://jlsys.co/