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Thread: PE table comparison...

  1. 07-27-2006 #1
    oupike1757
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    PE table comparison...

    I have attached a file of three PE tables. One is the factory setting for my Z06, one is from a tune done by LG, and the other is one that I came up with after reading some posts by various people on this site.

    There is not one similarity between them. Is everyone doing this based off different theories, or is there a standard that I am missing? Don't get caught up in the numbers, as different engines like different numbers, but the trends should be the same. Shouldn't they?

    Current
    EQ ratio 1.17383 1.17383 1.17383 1.17383 1.17383 1.17383 1.17383 1.17383 1.17383 1.17383 1.17383 1.17188 1.16699 1.15625 1.14844 1.14648 1.14844 1.15723 1.17383
    A/F ratio 12.50606987 12.50606987 12.50606987 12.50606987 12.50606987 12.50606987 12.50606987 12.50606987 12.50606987 12.50606987 12.50606987 12.52687989 12.57937086 12.69621622 12.78255721 12.80441002 12.78255721 12.68546443 12.50606987

    OEM Z06
    EQ ratio 1.20313 1.20313 1.20313 1.19727 1.19238 1.16699 1.16699 1.16309 1.16309 1.18945 1.21289 1.23535 1.23926 1.2373 1.21484 1.21191 1.21191 1.21191 1.21191
    A/F ratio 12.20150773 12.20150773 12.20150773 12.26122763 12.31151143 12.57937086 12.57937086 12.62155121 12.62155121 12.34183866 12.10332347 11.88327195 11.84577893 11.86454376 12.08389582 12.11311071 12.11311071 12.11311071 12.11311071

    LG Tune
    EQ ratio 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871 1.17871
    A/F ratio 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325 12.45429325




    Please discuss...

    Jeremy

    I also posted this on another tuning site.
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  2. 07-27-2006 #2
    Yelo
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    Yours looks the most normal compared to mine and others I've seen...the LG tune is kinda wierd by my thinking but would be safe. the OEM Z06 tune just looks freakin' wierd
    Last edited by Yelo; 07-27-2006 at 12:55 PM.
    '99 ECSB Silverado 2500LD
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  3. 07-27-2006 #3
    S2H
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    your current one is probably the best option of the 3
    -Scott -
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  4. 07-27-2006 #4
    Billf6531
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    You also need to look at your PE enable values to see where/when PE is invoked. Some of what you're seeing will never happen.
    Best regards,
    Bill
    Silver 2003 C5 roadster, M6, Euro red/amber tails, Z06 Ti mufflers, Z06 2 cat H-pipe, Z06 airbox, and HPTuners s/w - available to any Corvette or other GM vehicle in Calgary, and also for Ford and Dodge products, including Cummins
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  5. 07-27-2006 #5
    oupike1757
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    Quote Originally Posted by Billf6531
    You also need to look at your PE enable values to see where/when PE is invoked. Some of what you're seeing will never happen.
    What do you mean it will never happen?

    TPS threshold

    55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 45.00000 35.99609 25.99609 25.99609 25.99609 25.99609 25.99609 25.99609 25.99609

    Are these too high?

    Delay 2000 rpm
    map 15
    map hyst 6
    Last edited by oupike1757; 07-27-2006 at 02:09 PM.
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  6. 07-27-2006 #6
    Russ K
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    On my 2001 ZO6 cam/header car, I set the eq to 1.13, the tps to 75% at all rpm's and the delay rpm to 0. Then using a wideband O2, set the actual afr to 13.0 at all rpm's. Make sure the stoich afr is set to 14.68 and the OLFA table is 1.00 at operating temp (all map loads). This will make for a 14.68 commanded afr in none PE mode and 13.0 commanded afr in PE.

    Russ Kemp
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  7. 07-27-2006 #7
    Billf6531
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    You will never see PE under 2K RPM. If your driving style includes jumping on it during a rolling start, set the RPM delay to 0 or 1000. Your PE is a little fat at low RPM. Try 13.0, or so. Others may have a different opinion. Your TPS ramp looks fine.

    Quote Originally Posted by oupike1757
    What do you mean it will never happen?

    TPS threshold

    55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 55.00000 45.00000 35.99609 25.99609 25.99609 25.99609 25.99609 25.99609 25.99609 25.99609

    Are these too high?

    Delay 2000 rpm
    map 15
    map hyst 6
    Last edited by Billf6531; 07-27-2006 at 05:12 PM.
    Best regards,
    Bill
    Silver 2003 C5 roadster, M6, Euro red/amber tails, Z06 Ti mufflers, Z06 2 cat H-pipe, Z06 airbox, and HPTuners s/w - available to any Corvette or other GM vehicle in Calgary, and also for Ford and Dodge products, including Cummins
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  8. 07-27-2006 #8
    playtoy_18
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    Is PE hysteresis referring to the difference in tps% to fall out of PE? ie..@6% hysteresis then it will take a 6% difference in TPS to get out of PE and into PE?
    On another vehicle i have a PE enable map hysteresis,i am guessing this is same concept but it must show a x% difference in the MAP to enable/disable PE??
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  9. 07-28-2006 #9
    Russ K
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    The map hysteresis is the value subtracted from the map enable value. If your map enable is 75 kpa and the hysterisis is 6 kpa, then if the map drops to 69 kpa while in pe, then the pe will be disabled.

    Never saw a tps hysterisis on any V6 or V8 vehicles.

    Russ Kemp
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