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Thread: boost and throttle plate issues

  1. #1
    Tuner in Training
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    boost and throttle plate issues

    2018 raptor
    Fullrace Intercooler
    Tial BOV
    Throttle body spacer
    full exhaust "corsa"
    air raid intake
    Ive managed to bring power up to 483tq 436hp.
    having issues with boost control and throttle position
    I have gone through all the limiters I could see there are probably more. my tip in should be on point.
    I have traction control turned off, smart trac turned off and it has still all the abs and trac lights.
    is my issue in the trac system is there a dyno mode??? throttle position is limiting 40% of whats actually commanded
    and help from the eco boost gurus would help and be greatly appreciated!
    I do see the timing retard values in the log however I'm tuning with 4 channel knock ears and DO NOT HEAR AND KNOCK. so I'm letting the -2 ride.
    map and log attachedraptortest2.hplSPSstage3unprotected.hpt

  2. #2
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    better scaled data log. our baro is 97kpa.
    Attached Files Attached Files

  3. #3
    Advanced Tuner LastPlace's Avatar
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    Look at when your throttle starts to close

    Screenshot (22)_LI.jpg
    Attached Images Attached Images

  4. #4
    Advanced Tuner LastPlace's Avatar
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    Also -Knock retard (negative) is the ecu NOT seeing knock and adding positive timing (a good thing)

  5. #5
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    just adjusted this by 15% and still same outcome

  6. #6
    Advanced Tuner LastPlace's Avatar
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    post the new tune and log - 15% might not be enough in a couple of those cells.
    Last edited by LastPlace; 04-26-2018 at 07:33 PM.

  7. #7
    Put TTL/LTT back to stock, lower your driver demand to a normal value, and retest. Too many drastic changes. You don't want to just max limiters or extreme changes. These respond better to raising limiters slowly and only raise if one is in the way.

  8. #8
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    here is the last Data log. 500ftlbs torque 462whp now this is on a MD500 DYNO.... I get 220 kpa but then the throttle plate pulls it back down. I'm assuming I still have a limiter some where this is with the bump @ 20% in those areas. Also I'm horrible with acronyms TTL/LTT? still no Knock on the 4 channels ears
    Attached Files Attached Files

  9. #9
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    found it everyone it was in the combustion stability map.

  10. #10
    Advanced Tuner LastPlace's Avatar
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    Torque to load / load to torque (inverse)

  11. #11
    Advanced Tuner LastPlace's Avatar
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    Quote Originally Posted by Globalgtr26 View Post
    found it everyone it was in the combustion stability map.
    Screenshot (21)_LI.jpg

    So you raised all of these?
    Last edited by LastPlace; 04-27-2018 at 03:12 PM.

  12. #12
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    No just the Map area. in the last data log I noticed that as soon I hit 29psi the throttle would close. All the other areas were set up for 19psi + my baro. so it was limiting throttle to control boost. as soon as I raised it limiter went away and I saw the commanded boost