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Thread: Cobb Datalog Advice

              
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    Cobb Datalog Advice

    Hi still new to reading datalogs, but how does this log look?
    Im getting some timing pulls across all cylinders but nothing more then -3. (maybe time for new plugs, its been about 20k since they were last changed)

    My concern is the HPFP/LPFP req PSI and the HPFP/LPFP actual numbers.

    Is it ok that my actual numbers are alot higher then the Req numbers?
    Thanks!
    Attached Files Attached Files
    Last edited by EastCoast335i; 12-06-2012 at 11:11 AM.

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    your attached excel file is not a CSV, and lost its comma's so i cant even import and delimit the fields. Take the original datalog, "save-as" CSV, and re-upload.
    2007 BMW 335i 6MT / Alpine Weiss
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    Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    your attached excel file is not a CSV, and lost its comma's so i cant even import and delimit the fields. Take the original datalog, "save-as" CSV, and re-upload.
    Sorry see if this works:
    Attached Files Attached Files

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    Click here to enlarge Originally Posted by EastCoast335i Click here to enlarge
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    Sorry see if this works:
    Much better. Log looks pretty healthy, i dont see any real issue with your fuel pressures. If your low or high fuel pressure actual begins to not be able to keep up, thats when you should worry.

    Timing corrections midpull dont look too bad, i think they are probably just noise. To rule it out, i would suggest you do a few more pulls and see if the timing is constantly correcting i that same area. If it is, that map is a little too aggressive for your car, or you need some additional octane to keep the car happy.
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    @EastCoast335i If you have Excel you should use my tool, log all timing corrections, and analyze the log.... Any "questionable" timing corrections will highlight in orange, and larger corrections will highlight red.

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    I've tried using your tool numerous times and versions and everytime i try to open a datalog file I get an excel error, not sure what im doing wrong.

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    COBB Datalog Advice #2

    So I added 1g of e85 and ran another log. Please see attached log.
    This time I only got timing corrections in cyl5 (could this be the mystery cyl5 issues others are having as well??) No misfires, car pulls hard to redline.

    I noticed in this run after adding 1g more of e85 my LPFP (approx 4500k and up) is not hitting the Req LPFP #'s.
    Is this something to be concerened about? Maybe I added too much e85?
    Thanks Click here to enlarge
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    FYI, you should probably have posted this in your other thread. No need for a duplicate. Sticky will probably merge them anyways.

    *Warning, I am still a novice at reading logs* Whats with the TPS drop early on? Did you have TC on? Your boost does not drop so its not a shift. STFTs look fine so I dont think there are any immediate issues with the LPFP. Its hard to say if there it "too" much E85 in the misture without knowing how much 93 you had in already.

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    Click here to enlarge Originally Posted by ATP Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    FYI, you should probably have posted this in your other thread. No need for a duplicate. Sticky will probably merge them anyways.

    *Warning, I am still a novice at reading logs* Whats with the TPS drop early on? Did you have TC on? Your boost does not drop so its not a shift. STFTs look fine so I dont think there are any immediate issues with the LPFP. Its hard to say if there it "too" much E85 in the misture without knowing how much 93 you had in already.
    Yeah TC is always off... Throttle closure is due to overboost condition.
    Others have mentioned that my wastegates are "tight" hence overboost.. I'm going to have to resolve that with a protune. But im not concerned about TC closures, more about cyl5 only corrections and my LPFP REQvsACT #'s

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    Looking at that log i would say you're right at the limit of your LPFP.

    I'm not a fan of running things on the edge so i would suggest a couple things

    1) This one will require money: Either try putting in a new OEM LPFP and see if that helps OR try out Shiv's BAP solution.

    2) Run less ethanol and pull some timing out of the E30 race gas map until you're LPFP is happy AND you're not getting a lot of corrections.

    That's just me though, you're having no problem with AFRs so technically you're OK where you're at... but if the LPFP suddenly craps that could be a bad situation.
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    Click here to enlarge Originally Posted by ATP Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    FYI, you should probably have posted this in your other thread. No need for a duplicate. Sticky will probably merge them anyways.
    Yes he will. Merged.

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