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Thread: LT1 24x swap tuners - Base tune info needed

  1. #1
    Advanced Tuner
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    Mar 2009
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    LT1 24x swap tuners - Base tune info needed

    What I've got: 1995 Impala 383ci LT1, full bolt ons, 24x swap. PCM is a 0411

    What I need: Info for what needs to be changed in the PCM. I've attached my starting tune. I've read something about the injector bank select needing to be changed and if the FP regulator is vacuum actuated (pretty sure this one is) I should set my IFR to a static all the way across???

    Anyway, if someone could get me pointing in the right direction I can handle everything else. Just need to know what needs to be changed in the 0411 PCM to make it happy being in an LT1 Impala. I'll handle all the fueling / timing / other stuff myself.

    Also quick note: I'm getting crank / cam position sensor codes even though the sensors are brand new. Should I do a case relearn?

    Thanks in advance!
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  2. #2
    Advanced Tuner
    Join Date
    Nov 2013
    Posts
    208
    Have a look at this thread. It has most of the 24X swap info.

    http://www.hptuners.com/forum/showth...se-step-inside

    And yes a case relearn is a good idea.

    Thanks,
    Jason
    1996 Camaro SS M6 - 24X conversion - stock bottom end - heads - shorty headers - 58mm TB
    Ultradyne 230/238 .565/.565 112+4 - 30 LB red top SVO injectors - LOTS of suspension...

    2002 GMC 2500 HD Duramax M6 - Just starting the tune on a stock motor now that I have a good clutch on order...