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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; Originally Posted by EJ257 Without seeing the map, and only going by the log, I would disagree that the car ...

  1. #46
    Registered User SubiEj255's Avatar
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    Quote Originally Posted by EJ257 View Post
    Without seeing the map, and only going by the log, I would disagree that the car was "running fine".



    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.
    Do you E-tune? Would you like to see the map?

    Here is the 91 oct tune with 93 oct in the tank

    https://docs.google.com/spreadsheet/...2pUSTVDRlIxTlE
    A car is only as good as its driver

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  3. #47
    Registered User PartyPizza's Avatar
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    Need help with stage 2 tune.

    You're over boosting significantly at high rpm. According to Cobb, you want TD Boost Error to be a small, positive number.

    I'd run the 91ACN LWG map until you can protune for the catless DP. It's nearly identical to the 91 map, but has lower boost targets/waste gate duty cycles.

  4. #48
    Registered User SubiEj255's Avatar
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    It seems when the target boost are lower, I over boost. I will pull a log. However the etune is what I was currently running. I really don't need the Cobb maps, I'm just trying to figure out what a log should or "ideally" look like.
    A car is only as good as its driver

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    Registered User Heide264's Avatar
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    Re: Need help with stage 2 tune.

    Quote Originally Posted by PartyPizza View Post
    You're over boosting significantly at high rpm. According to Cobb, you want TD Boost Error to be a small, positive number.

    I'd run the 91ACN LWG map until you can protune for the catless DP. It's nearly identical to the 91 map, but has lower boost targets/waste gate duty cycles.
    Is the OP running a cat less down pipe? I didn't see it mentioned. It would make sense.

    The flip side, even with a pro tune, if it is due to the cat less dp, it won't be resolved most likely.
    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

  6. #50
    Registered User SubiEj255's Avatar
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    Yes, I am running catless
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  7. #51
    Registered User Heide264's Avatar
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    Re: Need help with stage 2 tune.

    Quote Originally Posted by SubiEj255 View Post
    Yes, I am running catless
    Again, haven't looked at your logs, but if primary wgdc is zero (after corrections) and you are over boosting still... That isn't gonna be resolved with a pro tune. Even if you aren't boost creeping, I bet you'll have boost control issues until you get a different waste gate (turbo with iwg or ewg).

    To test for this, run your manifold pressure directly to the wastegate nipple. This will be mechanically setting your wgdc to zero. Do a WOT pull. See if your boost is higher than spring tension (7ish psi). Plug the other open part of the line with something tightly. I used a screw and a tight wire tie. Be careful here... You can just as easily run 100 wgdc by leaving the wastegate isolated from the manifold (eg open boost line causing wastegate to not see manifold pressure)
    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

  8. #52
    Registered User SubiEj255's Avatar
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    It's not like extreme over boost tho.
    A car is only as good as its driver

  9. #53
    Registered User Heide264's Avatar
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    Re: Need help with stage 2 tune.

    Quote Originally Posted by SubiEj255 View Post
    It's not like extreme over boost tho.
    Doesn't have to be
    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

  10. #54
    Subaru Newb MainFrame's Avatar
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    Quote Originally Posted by Heide264 View Post
    Doesn't have to be

    Exactly.. 1psi over target can be the difference between running 200k miles, and a blown engine (if it pushes it into a load range that isn't tuned for).

  11. #55
    Registered User SubiEj255's Avatar
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    Does anyone here etune?
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    Subaru Newb MainFrame's Avatar
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    A few poeple.. Ron and Matt.

  13. #57
    Registered User SubiEj255's Avatar
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    Quote Originally Posted by MainFrame View Post
    A few poeple.. Ron and Matt.
    I dont know them by name

    How does this map/log look?

    https://docs.google.com/spreadsheet/...lZUWThZeHZ2NHc
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  14. #58
    Registered User Heide264's Avatar
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    Quote Originally Posted by MainFrame View Post
    Exactly.. 1psi over target can be the difference between running 200k miles, and a blown engine (if it pushes it into a load range that isn't tuned for).
    Not to mention it is difficult to modulate boost throughout the band. You'll hit unexpected and difficult to control boost spikes. A good exercise, if you hate your life, is to try to get a 3 port ebcs tuned to have near mechanical spool on a system with boost creep. Until I got my EWG, I always had to open the solenoid pretty early relative to peak boost in order to prevent the nasty boost spike that would occur otherwise.
    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

  15. #59
    Registered User Heide264's Avatar
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    Quote Originally Posted by SubiEj255 View Post
    I dont know them by name

    How does this map/log look?

    https://docs.google.com/spreadsheet/...lZUWThZeHZ2NHc
    I'm not familiar with Cobb's "dynamic advance" tables. I saw your DAM was 1 which is a good thing (it should be 1, otherwise you have some fairly substantial issues). I also did not see any FLKC or FBKC.

    Boost wise, here is your graph:


    You didn't log anything that would show if that was what the tune is aiming for or not. Next time Take out MAF(g/s), IDC, AFRs (the stock sensor is useless under boost anyhow), AFC, & AFL (when doing a WOT pull). That will give you better resolution for other things you need. That's a fairly aggressive tune in my opinion, especially without knowing your actual AFRs.

    Things that would help:
    -Target Boost (or you can dig through the map notes. I would rather log it to see it post compensations & DBW stuff)
    -WGDC (to see if you are boost creepin' or not)
    -Possibly WGDC corrections in the future

    Also, what else is done to the car other than a catless downpipe? It would be useful to know now. Intake? EBCS? Just group them up in a conclusive place for us. My apologies if they are buried somewhere else that I missed.
    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

  16. #60
    Master Baiter EJ257's Avatar
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    Quote Originally Posted by SubiEj255
    I dont know them by name

    How does this map/log look?

    https://docs.google.com/spreadsheet/...lZUWThZeHZ2NHc
    You keep switching maps, and posting logs. For every log you post, you need to tell us what the map is so we have an idea of what's going on.

    You need to make sure boost is close to target, and you need to make sure the knock parameters are in line. Remove the parameters that Brandon mentioned (as well as MAFv and the two Dynamic Adv ones, leave DAM) to get better resolution. Add in TD Boost Error.

    Cobb S2 maps target like 17-17.5, I believe. You're overshooting that a good bit, if it's one of them.
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