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Thread: First drive L92 with VVT and 4L70E LOG

  1. #21
    Lifetime Member 68problemchild's Avatar
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    Stomping on it out of the gas station. I had to let up, I got scared!

    PS, I think I let up about 4800 rpm. Still some left.
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    Last edited by 68problemchild; October 16th, 2010 at 09:53 AM.

  2. #22
    Joe (Moderator) joecar's Avatar
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    Ok, MAP seems to be correct now.

    Ok, NBO2's seem to be working...

    LTFT's are pegging positive meaning your MAF and/or VE are low.

    Do you have a pic of the MAF plumbing...?

  3. #23
    Joe (Moderator) joecar's Avatar
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    Remove the pids O2S11, O2S21, and add AIRPERSEC, KR, TCCMODE, GEAR.

    Also add CALC.CYLAIR.

  4. #24
    Joe (Moderator) joecar's Avatar
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    11-80mph in 5.5 seconds

  5. #25
    Lifetime Member 68problemchild's Avatar
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    Awesome. Joecar, I dont see the tccmode, kr or calcylair pids? Are they called something else for E38's?

    Its possible my MAF is wrong. Its not the "chip" type that I think was stock but Geoff suggested the wire maf as its easier supposedly to tune.
    2007 Corvette MAF 15904068

    Here is a photo:



    Thank you all. This is coming together. So much fun to be driving rather than wrenching after a year.

    PS throttle % seems to be 65 when its on the floor. Weird.
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    Last edited by 68problemchild; October 16th, 2010 at 10:32 AM.

  6. #26
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    Quote Originally Posted by 68problemchild View Post

    Its possible my MAF is wrong. Its not the "chip" type that I think was stock but Geoff suggested the wire maf as its easier supposedly to tune.
    2007 Corvette MAF 15904068

    Thank you all. This is coming together. So much fun to be driving rather than wrenching after a year.

    PS throttle % seems to be 65 when its on the floor. Weird.
    Yes thats an LS1/early LS2 style MAF. Your tune is probably curved for a current truck/G8 MAF (06 onwards). If you want to run that MAF then best to find a tune for an 06/07 Vette and drop the MAF datapoints into your tune.

    Re your question on LS1Tech regarding MAP sensor...where did that MAP sensor come from? Looking at the bolt type retention method it certainly looks like an 08+ MAP sensor.

    If it is then:

    {B2101} MAP Sensor Scaler 128.125
    {B2103} MAP Sensor Offset -0.3125
    {B2104} MAP Default for Throttle DTC 92
    {B2105} MAP Sample Rate Slow

    (I had an '08 tune open in front of me... )

    You may need to disable hi or low volts test in the tune. We dont have access to the parameters that calibrate the MAP diagnostics so disabling may be necessary if MAP DTC's pop.

    But it could be a 3 bar MAP as well so you would need Vette ZR1 LS9 or Cadi CTS-V LSA blown tune parameters in that case: www.holdencrazy.com.

    If you want to check what it is from exactly call your local dealer parts counter and ask them what the part number comes from.

  7. #27
    Lifetime Member 68problemchild's Avatar
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    That is the map from a 2010 LS3 Camaro, I think. The log above reflects those settings. It works pretty well but its not at 100 kpa at start its 102.

    I think I should get the new LS3 chip maf and put in the stock LS3 Camaro maf tune.

    I think this LS3 VVT is gonna be a screamer when you guys are done with it.

    When done, will start tweaking the VVT.

    Thanks guys. I really appreciate all the help.

    Its a riot.

  8. #28
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    Quote Originally Posted by 68problemchild View Post
    That is the map from a 2010 LS3 Camaro, I think. The log above reflects those settings. It works pretty well but its not at 100 kpa at start its 102.

    Thanks guys. I really appreciate all the help.

    Its a riot.
    Yes the MAP can read even up to 103 or 104 at key on. To really understand whether it is reading right check your local weather observations/reports and see what the barometer is.

    The GM blade MAF is fine but using a tube MAF is easier to start with as calibration does not depend on the many variations on ducting that the blade MAF can be used in.

    Cheers.

  9. #29
    Lifetime Member 68problemchild's Avatar
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    Thanks for all the help. You guys rock.

    PS is that GM Holden? The only LS3 using a 4L70E holden! So Christmas came early.

    I don't know how many people told me this could not be done.

    "It will never work"

    "you will never tune it"

    "Just put in a stock LS3 cam and throw away the VVT"

    Thanks for your support.
    Last edited by 68problemchild; October 17th, 2010 at 03:46 AM.

  10. #30
    Joe (Moderator) joecar's Avatar
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    Ian, do you think that MAF is ok so close to the the conical filter...?

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