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Thread: A/F tweak vs auto tune

  1. #1
    Lifetime Member minytrker's Avatar
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    Default A/F tweak vs auto tune

    My car runs really well driving around but its a little rich at wot still. My a/f is 12.72 with 26 for timing with no kr. Would I do better just trying to adjust from 3500rpm till 6500rpm at wot or should I do the auto tune. I just had my car on the dyno and it below normal. Would the 12.72 being holding back some power? I made 377rwhp/371rwtq where the norm is 385-395rwhp.

  2. #2
    Lifetime Member minytrker's Avatar
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    Can I still use auto tune if I don't have stock fuel or timing tables?

  3. #3
    Guess who's back!!!! Black02SS's Avatar
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    Yes you can do both. It is up to you but if it was me I would do the autotune to make sure it is all correct.

  4. #4
    Lifetime Member minytrker's Avatar
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    I don't have my stock fuel or timing maps, I had them tweaked last year before I had efi live, so its ok to start autotune with a non stock ve table?

  5. #5
    Lifetime Member BowlingSS's Avatar
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    Quote Originally Posted by minytrker
    I don't have my stock fuel or timing maps, I had them tweaked last year before I had efi live, so its ok to start autotune with a non stock ve table?
    Sure no problem. Do you have a WB?

    Bill
    2011 Camaro 2SS/RS L99 RJT
    CAI, Inc. Cold Air Induction;ADM Scoop
    Rx Catch Can;Rx Breather;Roto-Fab Washer Container
    VMax Ported RJT Throttle Body
    XSPower Headers and XSPower 3" Exhaust System
    Elite Engineering Tunnel Brace,
    Gorilla Wheel Lock System;
    Tinted Windows 35%;EFILive Tune

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    Lifetime Member minytrker's Avatar
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    Yes, I have a wideband installed. Will autotune fix being rich at wot?

  7. #7
    Lifetime Member BowlingSS's Avatar
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    Quote Originally Posted by minytrker
    Yes, I have a wideband installed. Will autotune fix being rich at wot?
    The autotune will get your VE table right. If you have stock OS your PE Table will need to be changed after your autotune. PE Table controls WOT.

    Bill
    2011 Camaro 2SS/RS L99 RJT
    CAI, Inc. Cold Air Induction;ADM Scoop
    Rx Catch Can;Rx Breather;Roto-Fab Washer Container
    VMax Ported RJT Throttle Body
    XSPower Headers and XSPower 3" Exhaust System
    Elite Engineering Tunnel Brace,
    Gorilla Wheel Lock System;
    Tinted Windows 35%;EFILive Tune

  8. #8
    Lifetime Member minytrker's Avatar
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    I use the PE ModifierBased on RPM right? If thats right, whats the formula for figuring out how much to change that number to change the A/F. Right now from 3200rpm on up its .86.

  9. #9
    Lifetime Member BowlingSS's Avatar
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    Quote Originally Posted by minytrker
    I use the PE ModifierBased on RPM right? If thats right, whats the formula for figuring out how much to change that number to change the A/F. Right now from 3200rpm on up its .86.
    That is the right table.
    From EFILive Help:
    The air-fuel ratio (AFR) considered to be stoichiometric.
    This value is used by the PCM to determine the AFR of EQ ratio 1.0.
    AFR values for EQ ratios are calculated by dividing this value by the specified EQ ratio.

    So .86 should give you an AFR of about 12.6. What AFR are you shooting for?

    Bill

    2011 Camaro 2SS/RS L99 RJT
    CAI, Inc. Cold Air Induction;ADM Scoop
    Rx Catch Can;Rx Breather;Roto-Fab Washer Container
    VMax Ported RJT Throttle Body
    XSPower Headers and XSPower 3" Exhaust System
    Elite Engineering Tunnel Brace,
    Gorilla Wheel Lock System;
    Tinted Windows 35%;EFILive Tune

  10. #10
    Lifetime Member MN C5's Avatar
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    Quote Originally Posted by minytrker
    I use the PE ModifierBased on RPM right? If thats right, whats the formula for figuring out how much to change that number to change the A/F. Right now from 3200rpm on up its .86.
    You need to disable PE if your doing auto tune.. Once the VE table is dialed in then fire it back up.

    Just make sure your VE table is on the rich side and then start leaning things out with auto tune

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