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  1. #1
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    Terrible boost oscillation/fluctuation - logs inside

    Car is an Alpina B3S Biturbo
    VTT Stage 2 turbos
    AMS fmic
    AR catless dp
    Forge DVs(leaking??)
    ER Chargepipe
    JB4 G5 ISO + BMS Meth kit - although running map 0 with a flash

    I was thinking if it could be boost solenoids/DVs or something totally different.

    At partial throttle car runs great, also at WOT when it's fairly cold (oil at 90 degrees celcius) When it get warm (105-120C) Then sometimes the boost fluctuates at WOT.

    Look at this log:

    http://datazap.me/u/lfelunden/map-0?log=0&data=1-4

  2. #2
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    1 out of 1 members liked this post. Reputation: Yes | No
    As I already told told you via email, it's your flash. Load up our MT flash and let's use that as a go forward point for your tuning.
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, N63s, S55s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please see http://www.burgertuning.com/emissions_info.html for more information on legal requirements related to use of BMS parts.

  3. #3
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    lols....

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    you can lead a horse to water.... but you cannot make him drink.
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    FBO's. Spec S2+. E85.

  5. #5
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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
    As I already told told you via email, it's your flash. Load up our MT flash and let's use that as a go forward point for your tuning.
    Can't make the car start, tried both the first (wrong one) for MSD80, then the last you RACE MT flash file. I'll see if we can make some corrections on the file and if I can put it in with CMD.

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    To determine what flash file you need to load, then you need to first determine what ECU you have. For MSD81 load the ijeos line of files. For MSD80 the i8a0s files. Either way you can also have your tuner just open the file and port the changes over to your specific file and load it.
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, N63s, S55s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please see http://www.burgertuning.com/emissions_info.html for more information on legal requirements related to use of BMS parts.

  7. #7
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    Boost oscillations fixed!

    A vacuum hose for ~4$! Glad that it wasn't 4-5 figures lol

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    Click here to enlarge Originally Posted by lfelunden Click here to enlarge
    Boost oscillations fixed!

    A vacuum hose for ~4$! Glad that it wasn't 4-5 figures lol
    Glad it was simple!

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    Nice! Guess it wasnt your flash after all.
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    ESS 6XX kit

  10. #10
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    Click here to enlarge Originally Posted by bobS Click here to enlarge
    Nice! Guess it wasnt your flash after all.
    It is. His flash set point is wobbling at the same frequency. I think as long as he runs a JB4 on a map with a target higher than his flash target the issue won't crop up, and if he runs flash only it probably won't show up (as his duty cycle is set such to keep boost below target), but if he tries to run it on map 0 where boost is on target he'll get the wobble until he corrects the issue in the flash map. It also appears to be over advanced and is dropping a lot of timing post shift.

    His vacuum line problem is probably a red herring.
    Attached Images Attached Images  
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, N63s, S55s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please see http://www.burgertuning.com/emissions_info.html for more information on legal requirements related to use of BMS parts.

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