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Thread: Idle (Transition) Tuning

  1. #21
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    Thanks again

  2. #22
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    jfpilla

    I have a few questions about your Idle Tuning post.


    1. What do you mean if the VE Tables are off by more than 20% they need to be set.

    2. Input the logged MAF values into the idle airflow (raf) table, by temperature. How exactly is this accomplished?

    3. Can you expand a little about this;

    -Raise or lower idle airflow parked (IAC park ) values.
    You want to match logged desiac and maf values.
    This is done within each IAT range. You will need to watch Desiac and Maf results in Dash f10.
    Raising/lowering IAP raises/lowers desiac.


    These questions are just a start but should get me going.

    Thanks.

  3. #23
    Lifetime Member jfpilla's Avatar
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    Quote Originally Posted by launchn
    jfpilla

    I have a few questions about your Idle Tuning post.


    1. What do you mean if the VE Tables are off by more than 20% they need to be set.

    2. Input the logged MAF values into the idle airflow (raf) table, by temperature. How exactly is this accomplished?

    3. Can you expand a little about this;

    -Raise or lower idle airflow parked (IAC park ) values.
    You want to match logged desiac and maf values.
    This is done within each IAT range. You will need to watch Desiac and Maf results in Dash f10.
    Raising/lowering IAP raises/lowers desiac.


    These questions are just a start but should get me going.

    Thanks.

    To steal a recommendation by Bink:
    "If you want an excellent Tuning education then do an "Advanced Search" on LS1Tech. Search the "PCM Section" for ALL posts by NoGo . You will find a Tuning library of factual info by the MAN - it's fantastic that LS1Tech has archived all of their stuff!"

    What you're asking gets complicated and really, you need some background first.

    What mods does your car have and what issues are you trying to resolve?
    2003 red vert
    Mods:
    LS7 crate engine, wet sump, 24xx reluctor
    LPE 100mm MAF
    Vararam, cold air intake and bridge
    RPM Level 6/4L60e trans
    3.42 gears
    Yank SS3600
    1-7/8" AR headers
    Z06 exhaust
    470rwhp 437rwtq
    1/8th mi-1.526-60'-6.862-1/8th-@100.74mph

  4. #24
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    Right now I'm completely stock. I have a set of heads out getting worked and am looking at the G5X3. I wanted to have the tuning understood before I change these out. So far, one of the best step by steps that I have found is this post by NoGo.

    http://www.ls1tuning.com/iboard/index.php?showtopic=9

  5. #25
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    Quote Originally Posted by jfpilla

    To steal a recommendation by Bink:
    "If you want an excellent Tuning education then do an "Advanced Search" on LS1Tech. Search the "PCM Section" for ALL posts by NoGo . You will find a Tuning library of factual info by the MAN - it's fantastic that LS1Tech has archived all of their stuff!"

    What you're asking gets complicated and really, you need some background first.

    What mods does your car have and what issues are you trying to resolve?

    This has turned out to be excelent advise. I must say though my head hurts. I have basically taken all week to read through all of this and copy alot of valuable info into a document for later use.

    I have been able to answer all the questions that I had. I read through your post again and can follow it all the way through.

    The other HUGE breakthrough that I had was taking the time to play with some of the MAPs the EFILive can create. I can't stress how powerfull these are going to be for tuning. Right off the bat I made one for Knock Retard and one for VE (for later). For those that havent used the MAP feature, get into it!

  6. #26
    Lifetime Member jfpilla's Avatar
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    You're inspired. I have a feeling it will turn out well. Let us know how it goes and there will likely be some questions.
    2003 red vert
    Mods:
    LS7 crate engine, wet sump, 24xx reluctor
    LPE 100mm MAF
    Vararam, cold air intake and bridge
    RPM Level 6/4L60e trans
    3.42 gears
    Yank SS3600
    1-7/8" AR headers
    Z06 exhaust
    470rwhp 437rwtq
    1/8th mi-1.526-60'-6.862-1/8th-@100.74mph

  7. #27
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    Bah-duh-bump!

  8. #28
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    TTT. I think this needs to be a sticky before it gets buried

  9. #29
    Lifetime Member johnsZ06's Avatar
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    I'm beginning to see the light! :lol:

  10. #30
    Unknown Zone TAQuickness's Avatar
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    Just wanted to add a couple of cents to this awesome thread.

    Jfpilla spent a lot of time helping me out with this. I performed the procedure over and over and I was never able to get my IACDES_B to match DYNAIR. The car idles good (not great) and still bucked like a bronco under 2k RPM's.

    A couple of days ago, P Mack on LS1Tech made a post in regards to modifying the IAC Effective Area (B4403) table. Link http://www.ls1tech.com/forums/showthread.php?t=309671. I performed these steps, in conjuntion with Jfpilla's write up, and in 30 minutes, my car idles like stock, except for the pleasant loping sound.

    After you have performed the idle transition tuning, you will need to shift the cells in the B4403 table down until your IACDES_B matches DYNAIR.
    On a stock Fbod, the 12mm^2 is the value that the IAC motor starts to step. After I was done, I had shifted the cells down to 28mm^2.

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