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  1. #1
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    Cobb E30 Log - How do they look?

    I'm having a hell of a time using zasquatch's logging tool on my Mac. If anyone would post the attached file as a graph, I would greatly appreciate it. Let me know what you guys think as I am somewhat new when it comes to reading logs.

    I had a guy tell me that it looked like I was having LPFP issues when I posted my last log.
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    PTF Tuned Cobb Stage 2+ | H&R / Koni Sport | BBS LM

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    There's quite a bit of timing drops. Did you give your fuel time to mix before taking the logs? If so, you may need to add more E85.

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    I filled up on Tuesday. I have kept a consistent mix of 30% E85 mixed with Shell 93 with up to 10% ethanol.
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    PTF Tuned Cobb Stage 2+ | H&R / Koni Sport | BBS LM

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    Could you post the log for me to view?
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    PTF Tuned Cobb Stage 2+ | H&R / Koni Sport | BBS LM

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    Jstang, I recommend learning to view the datalog in spreadsheet form. It's very easy to do once you get used go it. Nothing wrong at all with using graphs, but spreadsheets are a little more detailed.


    I'm at work on my phone right now, but when I get a chance I'll see if I can graph your log for you but I'm sure some other useful member will do it before then.
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    MOTIV750, MOTIV P-1000 PI, MOTIV/FUEL-IT! low pressure fuel system, AEM EMS/COBB AP, Aquamist HFS-3, ETS FMIC, SPEC stage 3+ clutch/SS flywheel, BC Racing coilovers and VMR wheels wrapped in Hankook RS3s.

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    Thanks rader. I will do some reading when I have down time at work.
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    PTF Tuned Cobb Stage 2+ | H&R / Koni Sport | BBS LM

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    Click here to enlarge Originally Posted by vladi627 Click here to enlarge
    There's quite a bit of timing drops. Did you give your fuel time to mix before taking the logs? If so, you may need to add more E85.
    Just read this from PTF explaining that timing drops are present even on the stock tune.

    http://blog.protuningfreaks.com/2012...eliable-power/
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    PTF Tuned Cobb Stage 2+ | H&R / Koni Sport | BBS LM

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    Click here to enlarge Originally Posted by JStang Click here to enlarge
    Thanks rader. I will do some reading when I have down time at work.
    This is just a short DIY on the process I use when I'm looking at a spreadsheet

    1) I look at the TPS actual column and look for where it goes ~80%, that let's you know when you went WOT and started the pull.
    2) Then I look at Timing corrections 1-6 looking for corrections, corrections that occur before you go WOT or while TPS/load is ramping up isn't a huge deal.
    3) Then I go back to TPS act and check to make sure throttle closures aren't happening(if so take a look at Req boost and boost mean abs)
    4)Then AFRs and fuel trims.

    There's more to it than that but it's a good place to start. Other people may/probably do it different but that's just what makes most sense to me.
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    MOTIV750, MOTIV P-1000 PI, MOTIV/FUEL-IT! low pressure fuel system, AEM EMS/COBB AP, Aquamist HFS-3, ETS FMIC, SPEC stage 3+ clutch/SS flywheel, BC Racing coilovers and VMR wheels wrapped in Hankook RS3s.

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