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Thread: How to get a 4.8 off the line if it has an electronic throttle

  1. #11
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    O and it has 373 gears

  2. #12
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    Okay, here's my test tune...keep in mind it's all still new to me so don't make fun please haha
    Attached Files Attached Files

  3. #13
    Joe (Moderator) joecar's Avatar
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    Hi CM08,

    Looking at your tune file from post #12...

    I would set:
    - B3616 to 35% across,
    - B3618 to AFR 13.0 (EQ 1.13) across,
    - D0961, D0962 to 100% across,
    - D0926 to 33 mph or less,
    - D1108, D1109 to 0.3 s across,
    - D0701, D0702 increase slope from middle and up,
    - D0703 increase at left (no flat spot),

    If you want to run fully open loop then set B4206 to disable.

    Also post some logs.

    How is shift feel at various speeds...?

    Hey, we're all newbies at some time or other, so no one here will make fun of you, they're all good people...

    Cheers
    Joe

  4. #14
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    Okay guys thanks for the help, I'll give those adjustments a shot, in the meantime here's a 0-60 log from the current tune that was loaded in the ECM in case you're curious.

    As for the feel of the shift at various RPM's it doesn't seem too bad, pretty firm when it kicks down in the higher RPM range, 1st to 2nd felt a little spongy though
    Attached Files Attached Files

  5. #15
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    Hey man, Ive taken Joe's advice and a little of my own trans experience and thrown this .tun together for ya. Its not much, and its a hybrid of your stock, modified and joecar's ideas plus mine but it should help you in the right direction.
    Attached Files Attached Files
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  6. #16
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    Ok we tried all of joe's ideas and I still really need help in the low end range

  7. #17
    Joe (Moderator) joecar's Avatar
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    From your log in post #14, the HO2Sx1 voltages indicate you are lean at WOT thruout the range.

    You are running OLSD, so you will need to increase your B0101 table.

    To do this you will need a wideband to see by how much.

  8. #18
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    Can we just change the table and guesstimate how much...ya know trial and error?

  9. #19
    Joe (Moderator) joecar's Avatar
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    Try raising it 3% and see how it goes.

  10. #20
    Joe (Moderator) joecar's Avatar
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    Where can he get a wideband and what is the best price...?

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