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Thread: maf pid

  1. #11

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    Quote Originally Posted by Black02SS
    Totally correct Howard. The same difference factor from the VE table is applied to the MAF table. If it is off by XX amount, that means you need to tell the MAF you have XXX more/less air at that hrz. I can't remember, are you using a LC1?
    Yes I am using an LC-1 currently. Hopefully today my "high end" WB that is tied into my dyno shows up today. I think it has two 5 volt output signals in which I want to get one sent to the Flashscan.

    I think if I saw the map I would better understand what pids are being drawn to each other and compared. I appreciate your patience as sometimes I have to fumble with the understanding which afterwards is a basic thing to do! . Needless to say I am way further along then I was two months ago!

    Thanks Chad

    www.redline-motorsports.net

    1-954-703-5560

    2006 ZO6 895/866 with APS TT
    2010 SSRS Camaro HTR-900TT (798/801)
    2011 HTR-850R Camaro
    2012 ZL1 Auto (10.33@135 MPH) Video Here!

  2. #12
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    Here are some screen shots of a car I did. You will see how the BEN is in the VE table after I have applied it to the MAF table as well.



  3. #13

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    Isn't that same MAP as used for the VE?? If so once you enable the MAF your original commanded vs actual will be off if the MAF is out of calibration. At that point you now need to bring it back to the correct commanded by recalibrating the MAF scaling. By transfering the BEN factor to the MAF calibration table you are "trimming" the values to adjust for the percentage of error. Correct??

    At that point when you determine what your BEN numbers are, how do you cut/paste a x/y map of values into a column of values as noted in the MAF calibration parameter?

    www.redline-motorsports.net

    1-954-703-5560

    2006 ZO6 895/866 with APS TT
    2010 SSRS Camaro HTR-900TT (798/801)
    2011 HTR-850R Camaro
    2012 ZL1 Auto (10.33@135 MPH) Video Here!

  4. #14
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    The MAPs I posted above are just to give you an idea of what it looks like. The VE map isn't used after SD when tuning the MAF, I just showed it as a reference to see what your BEN looks like after you re-enable the MAF and adjust the MAF table. I just grabed this tune Howard as it isn't the final log. I looked but I can't find anymore. :(

  5. #15

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    Chad,

    I guess I need to back up for a second. Maybe to clarify the differences between a SD tune and Autotuning. Autotuning uses only the open loop fuel table as a "direct" commanding of fuel. That tied in with the ability to read actual, compare it and change it by a factor is the basic theory. Correct?

    The SD tune uses the VE table as the means of getting the PCM to not make LTRIM adjustments to keep the AFR at 14.7 for all but PE mode, which can be adjusted through PE changes and WB readings. Correct?

    In the VE SD tune I can see that after you do the tune with the MAF disabled, you would want to go back and get the MAF to agree with where you ended up without it. Correct?

    What about when you are auto tuning and you are just getting what you want for AFR because you are directly controling the fueling.

    I happen to have a stock 02 ZO6 in which we just installed a set of Kooks headers and a Vararam intake. I already noticed the LTRIMS at idle are 15 % and the AFR is reading some what lean at cruise rpms/loads. I would think most of the leaness is from the MAF being out of whack from the intake change. I'm sure the VE is fairly close and the motor is already making over 40 RWHP more and 40 RWFT over the stock setup. Now I need to fatten up the fuel a bit on top as its too lean still. This would be a perfect time to get the auto tuning working as the car is only slightly modified. It still leads me to the best approach after I get the car tuned without the MAF.

    I'm on a roll!

    www.redline-motorsports.net

    1-954-703-5560

    2006 ZO6 895/866 with APS TT
    2010 SSRS Camaro HTR-900TT (798/801)
    2011 HTR-850R Camaro
    2012 ZL1 Auto (10.33@135 MPH) Video Here!

  6. #16
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    I was going to call you but your website doesn't seem to be working on my end so I couldn't get a number. :lol: I am not quite understanding this question.

    What about when you are auto tuning and you are just getting what you want for AFR because you are directly controling the fueling.

  7. #17

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    That would be great.

    Its 518-355-8460

    Thanks much.

    Howard

    www.redline-motorsports.net

    1-954-703-5560

    2006 ZO6 895/866 with APS TT
    2010 SSRS Camaro HTR-900TT (798/801)
    2011 HTR-850R Camaro
    2012 ZL1 Auto (10.33@135 MPH) Video Here!

  8. #18
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    Quote Originally Posted by Redline Motorsports
    That would be great.

    Its 518-355-8460

    Thanks much.

    Howard
    Sorry it took so long, I just tried calling and left a VM.

  9. #19
    Joe (Moderator) joecar's Avatar
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    Can I get a copy of the MAF BEN for LC1, please...?
    Thanks,
    Joe

  10. #20
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    Here you guys go.
    Attached Files Attached Files

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