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Thread: EFI RWHP and EFI RWTQ

  1. #21
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    Still not finished. Will edit this post later. Waiting on suggestions or examples of more real life data.


    I would use the NEW PID. I will edit the OLD PID. The OLD pid is based off data points of cars in general. The NEW pid is based off the scientific calc from our cars. Really the whole things just bumps up the HP values a little. It matters though when speeding in 4th gear. Now if you guys get me data on a tilt sensor I can add in inclines heheh. That is simply based off the vehicles weight and how much of it is going to fight the car based off + or - cos(inclination)*mass*gravity!


    *CLC-00-004
    hp -200.00 600.00 .1 "0.00006*{SAE.VSS.mph}^3-0.0006*{SAE.VSS.m# ================================================== ============================
    # File details
    # ------------
    #
    # This section defines various details about the file format.

    *FILE

    #Parameter Value Description
    #---------- ---------------- ---------------------------------------------------
    VERSION 7.1.1 File version
    DECSEP . Decimal separator used in this file



    # ================================================== ============================
    # Units
    # -------------------
    # See sae_generic.txt for more information on the *UNITS section

    *UNITS

    #Code System Abbr Description
    #-------- ---------- -------- -------------------------------------------------------------
    MPG Imperial MPG "MPG"
    LPK Metric LPK "Litre X KM"




    # ================================================== ============================
    # Add slot definitions here
    # --------------------------------
    # See sae_generic.txt for more information on "SLOT" formats
    #
    #Units Low High Fmt Expression
    #------------ ------------- ------------- ---- --------------------------------------------------------------

    ################################################## #################################
    #Wide Band PID
    *CLC-00-001
    V 0.0 5.0 0.1 "{EXT.AD1}"
    AFR 10.00 16.8 0.1 "{EXT.AD1}*1.36 + 10"
    factor 0.5 1.5 0.01 "({EXT.AD1}*1.36 + 10) / {GM.AFR}"


    ################################################## #################################
    #Fuel Economy
    *CLC-00-002
    MPG 0.00 99.99 .1 "{SAE.VSS.mph}/({GM.INJFLOW.lbpm} * {GM.IBPW1} * {SAE.RPM} * 4 / 6250)"
    LPK 0.00 99.99 .1 "235.2145584/{SAE.VSS.mph}/({GM.INJFLOW.lbpm} * {GM.IBPW1} * {SAE.RPM} * 4 / 6250)"


    ################################################## #################################
    #Aero Drag, power lost to go down road without changing speed.
    *CLC-00-003
    hp -200.00 600.00 .1 "0.000070146*{SAE.VSS.mph}^3-0.0007566*{SAE.VSS.mph}^2+0.13894268*{SAE.VSS.mph}-0.1634172"
    kW -200.00 600.00 .1 "0.745699872*(0.000070146*{SAE.VSS.mph}^3-0.0007566*{SAE.VSS.mph}^2+0.13894268*{SAE.VSS.mph}-0.1634172)"


    ################################################## #################################
    #Raw Power, power you are using to to change speed.
    *CLC-00-004
    hp -200.00 600.00 .1 "((gvmlb()+({GM.FUELREM}*6.350)+130)*{SAE.VSS.mph} )*dx({SAE.VSS.mph},6)/8226.63"
    kW -200.00 600.00 .1 "0.745699872*(((gvmlb()+({GM.FUELREM}*6.350)+130)* {SAE.VSS.mph})*dx({SAE.VSS.mph},6))/8226.63"


    ################################################## #################################
    #Raw Force, force that must be applied to change speed.
    *CLC-00-005
    ftlb -200.00 600.00 .1 "({CALC.RawHP}*5252)/{SAE.RPM}"
    Nm -200.00 600.00 .1 "1.356*({CALC.RawHP}*5252)/{SAE.RPM}"


    ################################################## #################################
    #Power Demanded, Real wheel power it is taking to go down road AND change speed.
    *CLC-00-006
    hp -200.00 600.00 .1 "{CALC.RawHP}+{CALC.Powerlost}"
    kW -200.00 600.00 .1 "0.745699872*({CALC.RawHP}+{CALC.Powerlost})"

    # ================================================== ============================
    *PRN - Parameter Reference Numbers
    # --------------------------------
    # See sae_generic.txt for more information on the *PRN section
    #
    #Code PRN SLOT Units System Description
    #------------------------- ---- ------------ ---------------- ---------------- ------------------------------------------
    ################################################## #################################
    #Wide Band PID
    CALC.LM1 F021 CLC-00-001 "AFR,V,factor" Custom "A Custom PID for the LM1 WB in Voltage, AFR, or BEN."



    ################################################## #################################
    #Fuel Economy
    CALC.FuelEcon F031 CLC-00-002 "MPG,LPK" Custom "MPG o L/100kM."



    ################################################## #################################
    #Aero Drag, power lost to go down road without changing speed.
    CALC.Powerlost F041 CLC-00-003 "hp" Custom "HP Lost from air and rolling resistance."



    ################################################## #################################
    #Raw Power, power you are using to to change speed.
    CALC.RawHP F051 CLC-00-004 "hp,kW" Custom "RealRoadPower, Net HP/kW after grade, wind, rolling resis, ect."



    ################################################## #################################
    #Raw Force, force that must be applied to change speed.
    CALC.RealRoadTorque F061 CLC-00-005 "ftlb,Nm" Custom "RealRoadMoment, Net Ftlb/Nm after grade wind rolling resis ect."



    ################################################## #################################
    #Power Demanded, Real wheel power it is taking to go down road AND change speed.
    CALC.PowerDemanded F071 CLC-00-006 "hp" Custom "Estimate of crank hp. hp from accel + drag + aero."ph}^2-0.0275*{SAE.VSS.mph}"

    *CLC-00-005
    hp -200.00 600.00 .1 "((3600+({GM.FUELREM}*6.350)+135)*{SAE.VSS.mph})*d x({SAE.VSS.mph},2)/8226.63"
    kW -200.00 600.00 .1 "0.745699872*(((3600+({GM.FUELREM}*6.350)+135)*{SA E.VSS.mph})*dx({SAE.VSS.mph},2))/8226.63"

    *CLC-00-006
    ftlb -200.00 600.00 .1 "({CALC.OldRoadPower.hp}*5252)/{SAE.RPM}"
    Nm -200.00 600.00 .1 "1.356*({CALC.OldRoadPower.hp}*5252)/{SAE.RPM}"

    *CLC-00-007
    hp -200.00 600.00 .1 "{CALC.OldRoadPower.hp}+{CALC.OldDragLoss.hp}+{CAL C.NEWRollFric}"

    *CLC-00-008
    hp -200.00 600.00 .1 "0.00001917*{SAE.VSS.mph}^3-0.001789*{SAE.VSS.mph}^2+0.13239343*{SAE.VSS.mph} -0.0004866"

    *CLC-00-009
    hp -200.00 600.00 .1 "0.000053295*{SAE.VSS.mph}^3"

    *CLC-00-010
    hp -200.00 600.00 .1 "{CALC.OldRoadPower.hp}+{CALC.NEWRollFric.hp}+{CAL C.NEWAeroFric.hp}"



    CALC.OldDragLoss F051 CLC-00-004 "hp" Custom "OLD Aero Drag Losses."
    CALC.OldRoadPower F061 CLC-00-005 "hp,kW" Custom "OLD HP Estimated From Accel, Road Power."
    CALC.OldRoadTorque F071 CLC-00-006 "ftlb,Nm" Custom "OLD Torque Estimated from Accel, Road Torque."
    CALC.oldCrankHP F081 CLC-00-007 "hp" Custom "OLD Estimated Crank HP, RoadPower + Drag Losses."

    CALC.NEWRollFric F091 CLC-00-008 "hp" Custom "Newer Estimate of Rolling friction, 2002 Camaro."
    CALC.NEWAeroFric F092 CLC-00-009 "hp" Custom "Newer Estimate of Aero Friction, 2002 Camaro."
    CALC.NEWCrankPower F093 CLC-00-010 "hp" Custom "Newer Estimate of HP from Accel plus Drag Losses--> New Estimated Crank, 2002 Camaro."
    Last edited by 2002_z28_six_speed; January 19th, 2008 at 08:14 PM.

  2. #22
    Lifetime Member Chalky's Avatar
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    don't know if this would help but I did dyno recently after using the HP/TQ pids. Dyno results were peak @ 442 while calced in EFI was approx 403 RWHP.
    2015 Z06 A8

  3. #23
    Lifetime Member Chalky's Avatar
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    I was working off a prior setup without the variables other than car weight, driver weight.

    What I may try and do tonight is to compare calculated Hp with actual and see if the results are consistent throughout the rpm range.
    Last edited by Chalky; November 19th, 2007 at 01:28 PM.
    2015 Z06 A8

  4. #24
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    Quote Originally Posted by Chalky
    I was working off a prior setup without the variables other than car weight, driver weight.

    What I may try and do tonight is to compare calulated Hp with actual and see if the results are consistent throuhout the rpm range.
    That would be neat. Can you post a log and then the dyno graph? I can plot the approximate error between the two. Maybe that will show what is wrong.

  5. #25
    Lifetime Member Chalky's Avatar
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    Should not be a problem.
    2015 Z06 A8

  6. #26
    Lifetime Member Chalky's Avatar
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    Excel SS and EFI Log.

    My dyno file was given to me in file format rather than a printout. I transferred the data to an excel file.
    Attached Files Attached Files
    2015 Z06 A8

  7. #27
    Lifetime Member Chalky's Avatar
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    Any news to report?
    2015 Z06 A8

  8. #28
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    If it helps, here are my 2 dyno run log files. The first is 3 hp less then the second. My hp pid showed over 1k hp which is incorrect. The correction factor was 1.20 so the actual #'s are 603 rwhp on the second run.
    Attached Files Attached Files
    2002 ws6 stock short block
    GMPP cnc LS6 Heads 11.4:1 cr
    .576 i .581 e 116 lobe
    D1SC @ 10#
    723 rwhp 654 rwtq on E-85

  9. #29
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    I will look at it here in a little bit. Very busy with work.

    The only thing with running this pid on a dyno is that it will be off because u dont have the loading from air resistance on the dyno. Maybe better to use the factory power pid for the dyno
    Last edited by 2002_z28_six_speed; April 1st, 2008 at 05:11 PM.

  10. #30
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    I did'nt think of that. I'll try that next time go to the dyno.
    2002 ws6 stock short block
    GMPP cnc LS6 Heads 11.4:1 cr
    .576 i .581 e 116 lobe
    D1SC @ 10#
    723 rwhp 654 rwtq on E-85

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