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This is a discussion on Need help with stage 2 tune. within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Was that post supposed to be blank?...

  1. #31
    Registered User SubiEj255's Avatar
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    Was that post supposed to be blank?
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  3. #32
    Registered User SubiEj255's Avatar
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    A car is only as good as its driver

  4. #33
    Master Baiter EJ257's Avatar
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    Quote Originally Posted by SubiEj255
    Neither one is good. That said, the first one is "better" because you aren't pulling timing across the board by having a DAM of 0.

    You're pulling quite a bit of timing on both. You need to consider that you either have a mechanical issue, or the car is not taking that map well.
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  5. #34
    Registered User SubiEj255's Avatar
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    I figured that. What I don't know is the numbers I'm "supposed" to look for? I simply don't understand some of the values what they mean and where they are supposed to be. For example the "DAM" I understand quite well I think, but the FBKC and FKL I don't understand what they indicate.
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  6. #35
    Registered User SubiEj255's Avatar
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    Mechanical issue? The car only has 20xx miles on it; unless it is a part that I installed wrong..
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  7. #36
    Master Baiter EJ257's Avatar
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    Quote Originally Posted by SubiEj255
    I figured that. What I don't know is the numbers I'm "supposed" to look for? I simply don't understand some of the values what they mean and where they are supposed to be. For example the "DAM" I understand quite well I think, but the FBKC and FKL I don't understand what they indicate.
    You don't want your car to be pulling timing, which is indicated by either FBKC, FLKC, or DAM.

    RomRaider • View topic - Subaru's knock control strategy explained

    Quote Originally Posted by SubiEj255
    Mechanical issue? The car only has 20xx miles on it; unless it is a part that I installed wrong..
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  8. #37
    Registered User SubiEj255's Avatar
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    So the values in FBKC or FKL are supposed to stay at 0? When they aren't at 0 the car is removing timing to prevent knock. Did I get that correct?

    What does the "DAM" and "Dynamic adv" indicate?
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  9. #38
    Registered User Heide264's Avatar
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    Re: Need help with stage 2 tune.

    Quote Originally Posted by SubiEj255 View Post
    Mechanical issue? The car only has 20xx miles on it; unless it is a part that I installed wrong..
    I'd vote user error. It's not hard to make an install mistake.

    In a nutshell:
    Occasional Fbkc = Meh. Short term issue. Stuff happens.
    Flkc = stuff needs fixed
    Dam/iam at zero = stuff needs fixed now
    Quote Originally Posted by Trainrex
    He was throwing balloons filled with sulfuric acid and shrapnel at the swat team. They finally had to take him down with rubber bullets.
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  10. #39
    Master Baiter EJ257's Avatar
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    Quote Originally Posted by SubiEj255
    So the values in FBKC or FKL are supposed to stay at 0? When they aren't at 0 the car is removing timing to prevent knock. Did I get that correct?
    Yes. FBKC should always be 0 (ideally). FLKC should always be 0 (ideally), but will be negative if you pull timing, and will only be positive if IAM/DAM<1 and it's "testing the waters" in an attempt to raise the IAM/DAM back up.

    Quote Originally Posted by SubiEj255
    What does the "DAM" and "Dynamic adv" indicate?
    DAM: Dynamic Advance Multiplier (IAM, in the link I sent you)
    Dyn Adv: The amount of timing being added to the base timing table

    Ignition Timing = Base Timing + DAM*DA + FBKC + FLKC + Compensations (IAT, ECT, etc.)

    As a general rule, it's pointless to log either Base Timing or Dynamic Advance; essentially, they're just wasting bandwidth, which is already limited with Cobb logs.

    Quote Originally Posted by Heide264
    Occasional Fbkc = Meh. Short term issue. Stuff happens.
    Depends what you mean by "occasional"...

    If you get repeated FBKC in a similar RPM/Load range (but not every time), you're too close to the knock threshold, and need to address it. If RPM/Load FBKC can't really be replicated, it's not that big of a deal, assuming it's the first iteration (there's a table that explains what the FBKC retard value is).
    Last edited by EJ257; 01-20-2013 at 09:03 AM.
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  11. #40
    Registered User Heide264's Avatar
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    Re: Need help with stage 2 tune.

    Quote Originally Posted by SubiEj255 View Post
    So the values in FBKC or FKL are supposed to stay at 0? When they aren't at 0 the car is removing timing to prevent knock. Did I get that correct?

    What does the "DAM" and "Dynamic adv" indicate?
    First paragraph, yes.

    Second paragraph.. I am not sure about Cobbs DA. I just know DAM infers there was enough fine learning (flkc) that the car decided it's time to pull timing across the board with rough correction (dam in cobb/iam in open source)
    Quote Originally Posted by Trainrex
    He was throwing balloons filled with sulfuric acid and shrapnel at the swat team. They finally had to take him down with rubber bullets.
    2011 STi Build Log
    -Part 1 - Reading, Data Logging, and Analyzing Data
    -Part 2 - Turbocharger 101 & Basic Boost Control
    -Part 3 - EcuFlash, Experimental Defintions, and a Drive By Wire Intro

  12. #41
    Registered User SubiEj255's Avatar
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    ok, I am learning slowly, but surely and I definately appreicate the help.

    How about this log?

    https://docs.google.com/spreadsheet/...nQxSHRuV25ZeVE
    A car is only as good as its driver

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by SubiEj255
    ok, I am learning slowly, but surely and I definately appreicate the help.

    How about this log?

    https://docs.google.com/spreadsheet/...nQxSHRuV25ZeVE
    That's a lot better. What map are you running?

    I don't like the >100 IDC, but it's not knocking.
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  14. #43
    Registered User SubiEj255's Avatar
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    Ok, see I thought so. Is overboosting an issue in that log?

    Here are the maps as follows: the very first log was an e-tune map that the tuner said the car was running fine. So I paid for that. The second log was a standard Cobb OTS stage 2 93oct map and the last and an OTS stage 2 93oct LWG Cobb map.

    Overall, minus the idc's the log is "ideally" supposed to look like the last log I posted right?
    A car is only as good as its driver

  15. #44
    Master Baiter EJ257's Avatar
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    Quote Originally Posted by SubiEj255
    Here are the maps as follows: the very first log was an e-tune map that the tuner said the car was running fine.
    Without seeing the map, and only going by the log, I would disagree that the car was "running fine".

    Quote Originally Posted by SubiEj255
    The second log was a standard Cobb OTS stage 2 93oct map and the last and an OTS stage 2 93oct LWG Cobb map.

    Overall, minus the idc's the log is "ideally" supposed to look like the last log I posted right?
    You're overboosting with the LWG map. I would say try flashing the Cobb OTS S2 91 map (continue to fill with 93) and see how that looks.
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  16. #45
    Registered User Heide264's Avatar
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    Re: Need help with stage 2 tune.

    I am surprised he is at 100idc. The wrx and sti run the same injectors, correct? If so, I am still under 100 idc.
    Quote Originally Posted by Trainrex
    He was throwing balloons filled with sulfuric acid and shrapnel at the swat team. They finally had to take him down with rubber bullets.
    2011 STi Build Log
    -Part 1 - Reading, Data Logging, and Analyzing Data
    -Part 2 - Turbocharger 101 & Basic Boost Control
    -Part 3 - EcuFlash, Experimental Defintions, and a Drive By Wire Intro

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