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  1. #1
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    HELP - AFR on Durametric Testing

    I have been running a few simple idle and gentle driving tests using a Durametric system and REALLY NEED HELP


    Car = 2005 Porsche Turbo S, 6MT

    Mods = AWE GT2 race exhaust, high flow cats
    GIAC tune - assumed to be for 93 octane
    EVOMS - vflow intake system

    I am either the dumbest mother effer on earth or this car is running richer than a Dallas Oil Billionaire.

    I am assuming 10% ethanol content in my 93+ octane gas and therefore using a 14.7 * 0.9 multiplication factor on the Oxygen sensing Lamda value to get my AFR's

    My problem is even on an idle data-log the O2 banks seems to have very high Lambda values at 0.99-1.01 implying I am running an

    AFR > 14 and the lowest near 13 and when driving it was showing values over 60 (wtf ??)


    Am I doing something wrong or is this for real ?

    2005 Porsche 996 TTS RWD - Eurodyne 60-130 in 6.50s
    2015 Audi A3 2.0 TFSI - Eurodyne 0 - 100 in 10.67s
    2015 McLaren 650S (RHD) - UK - 1/3rd owner yet to drive


    Click here to enlarge



  2. #2
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    This shows some WOT test results.
    Attached Images Attached Images
    2005 Porsche 996 TTS RWD - Eurodyne 60-130 in 6.50s
    2015 Audi A3 2.0 TFSI - Eurodyne 0 - 100 in 10.67s
    2015 McLaren 650S (RHD) - UK - 1/3rd owner yet to drive


    Click here to enlarge



  3. #3
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    I believe lambda for E10=14.1. I'm willing to bet your super high afr is only when letting off the throttle.

  4. #4
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    Click here to enlarge Originally Posted by BoostAddict Click here to enlarge
    I believe lambda for E10=14.1. I'm willing to bet your super high afr is only when letting off the throttle.
    Is that normal but yes it is very high when I come off WOT

    ... I am dumb when it comes to this.....
    2005 Porsche 996 TTS RWD - Eurodyne 60-130 in 6.50s
    2015 Audi A3 2.0 TFSI - Eurodyne 0 - 100 in 10.67s
    2015 McLaren 650S (RHD) - UK - 1/3rd owner yet to drive


    Click here to enlarge



  5. #5
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    1 out of 1 members liked this post. Yes Reputation No
    Yes, perfectly normal

  6. #6
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    Thanks
    2005 Porsche 996 TTS RWD - Eurodyne 60-130 in 6.50s
    2015 Audi A3 2.0 TFSI - Eurodyne 0 - 100 in 10.67s
    2015 McLaren 650S (RHD) - UK - 1/3rd owner yet to drive


    Click here to enlarge



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