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Thread: Calc.PID question

  1. #1
    New Member
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    Dec 2005
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    Default Calc.PID question

    Maybe I had this questions posted in the wrong section so here it goes again.

    Is it possible to get a raw pulse count (or signal) off the factory VSS sensor (i.e. how many teeth it has picked up since a stop)??

    Working on a function to arrive at feet traveled, based off of the factory VSS sensor (tire circ. and gear incl.).

    I currently have a calc.pid now that gives me driveshaft rpm based from the vss. With this, I should be able to get a distance traveled but am having problems. If could get a raw value or count on the sensor, it would help out a ton.

    Any help would be appreciated.

    Eric
    03 Duramax

  2. #2
    Lifetime Member
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    Default

    How did you make a custom pid? i'm trying to do something simialar to that but i'm trying to figure out how to do a instant fuel econ. and a custom one to get actual boost which would be turbo boost minus baro. any suggestions?

  3. #3
    Lifetime Member JezzaB's Avatar
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    Nov 2006
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    Default

    Quote Originally Posted by bballer182
    How did you make a custom pid? i'm trying to do something simialar to that but i'm trying to figure out how to do a instant fuel econ. and a custom one to get actual boost which would be turbo boost minus baro. any suggestions?
    Did the boost one a while ago (my first calc pid actually )

    Edit the calc_pids.txt in the My Documents\V7.5\User Configuration\
    If its not there add it.


    Boost calculator

    Code:
    # ==============================================================================
    # Units
    # -------------------
    # See sae_generic.txt for more information on the *UNITS section
    
    *UNITS
    
    #Code     System     Abbr     Description
    #-------- ---------- -------- -------------------------------------------------------------
    
    *CLC-00-000
    psi      0.0      10.0      .0     "({SAE.MAP}-{GM.BARO})*0.145"
    
    # ==============================================================================
    *PRN - Parameter Reference Numbers
    # --------------------------------
    # See sae_generic.txt for more information on the *PRN section
    #
    #Code                      PRN  SLOT         Units            System           Description
    #------------------------- ---- ------------ ---------------- ---------------- 
    
    CALC.BOOST   F600 CLC-00-000   "psi"   Air "Boost pressure"   
    
    #------------------------------------------
    Does like you said. KPA - BARO and then convert to PSI

    Jez

  4. #4
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    Default

    Thanx, for the help. I've gone on to make many more helpful calc.pid's

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