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  1. #1
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    Single turbo 6466 question.

    im just wondering why no one is hitting 500rwhp at 5000rpm with the single turbo 6466, while the full boost is from lower rpm Click here to enlarge.
    but the 58mm turbo can hit it, is this a hardware problem or tuning or fueling problem?

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    Ak's car makes about 490@5000 I believe. Hp is a calculated number. It is derived from torque and rpm. The 58mm cars are probably making a bit more torque in the mid range to get there. Bigger turbo shifts the torque to the right. I'm sure tuning changes, and hardware (turbine housing a/r, runner length/diameter) can gain the extra bit in the lower rpm. Everything is a trade off though.

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    midrange fueling is probably the biggest issue. Meth can only make up so much of the equation.
    Click here to enlarge
    FBO's. Spec S2+. E85.

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    Click here to enlarge Originally Posted by Justin@BoostAddictions Click here to enlarge
    Ak's car makes about 490@5000 I believe. Hp is a calculated number. It is derived from torque and rpm. The 58mm cars are probably making a bit more torque in the mid range to get there. Bigger turbo shifts the torque to the right. I'm sure tuning changes, and hardware (turbine housing a/r, runner length/diameter) can gain the extra bit in the lower rpm. Everything is a trade off though.
    he is running about 450rwhp at 5000rpm the torque is about 490

    Click here to enlarge

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    That's a 900hp turbo. So there's ait of the powerband not being used due to the low boost and the low rpm limit. A smaller turbo will give you a much more usable powerband in this setup.
    2011 335is DCT, JB4 + MHD BEF, stage 2 LPFP, e50 + 50/50 meth, FBO, MT ET Streets when needed


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    To answer the question, my wastegate has a 1bar spring in it. I'm using a manual boost controller for now. Go back to my dyno thread you will see the wastegate cracking open at 15psi then building to 25psi slowly. I'll be putting the electronic boost controller on soon which will keep it from opening so soon. I made 450/490 ish at 5k rpm at only 19-20psi lmao. It's a technicality. Click here to enlarge

    Look ok at the log and you will see the angle of the boost curve ramp up and just over the wastegate spring psi the curve angle changes and slows down due to wastegate cracking early
    Last edited by Ak335i; 10-10-2013 at 08:59 AM.
    - Proven Power Tampa built 6466 ST -
    - N54 6AT WR 711whp 637wtq-
    -N54 WR 1/4mile trap: 133.57mph- -

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    That turbo will shine on high boost. Can't wait to see that dyno Click here to enlarge
    2011 335is DCT, JB4 + MHD BEF, stage 2 LPFP, e50 + 50/50 meth, FBO, MT ET Streets when needed


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    Click here to enlarge Originally Posted by 135idct Click here to enlarge
    he is running about 450rwhp at 5000rpm the torque is about 490

    http://www.audiboost.com/images/impo...10/asZJy-1.png
    Your right, I was looking at the torque lol. But my first post pretty much sums it up anyway.

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    Click here to enlarge Originally Posted by Ak335i Click here to enlarge
    To answer the question, my wastegate has a 1bar spring in it. I'm using a manual boost controller for now. Go back to my dyno thread you will see the wastegate cracking open at 15psi then building to 25psi slowly. I'll be putting the electronic boost controller on soon which will keep it from opening so soon. I made 450/490 ish at 5k rpm at only 19-20psi lmao. It's a technicality. Click here to enlarge

    Look ok at the log and you will see the angle of the boost curve ramp up and just over the wastegate spring psi the curve angle changes and slows down due to wastegate cracking early
    You need a new MBC! It definitely should not be cracking at 15 psi with a 1 bar spring. You're not even doubling boost, so a good MBC should hit 25 psi no probs. Try the Hallman MBC, it'll change your $#@!in' life, dawg...

    But seriously that shouldn't be happening.

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    Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
    You need a new MBC! It definitely should not be cracking at 15 psi with a 1 bar spring. You're not even doubling boost, so a good MBC should hit 25 psi no probs. Try the Hallman MBC, it'll change your $#@!in' life, dawg...

    But seriously that shouldn't be happening.
    yeah I hate this one lmao. It was just a cheap one to get the car boosting. If you don't mind send me a pm with the mbc you're referencing
    - Proven Power Tampa built 6466 ST -
    - N54 6AT WR 711whp 637wtq-
    -N54 WR 1/4mile trap: 133.57mph- -

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    Click here to enlarge Originally Posted by Ak335i Click here to enlarge
    yeah I hate this one lmao. It was just a cheap one to get the car boosting. If you don't mind send me a pm with the mbc you're referencing
    PM sent.

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    will the twin scroll turbo help to hit higher hp at lower rpm?

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    More tq faster yes.
    2011 335is DCT, JB4 + MHD BEF, stage 2 LPFP, e50 + 50/50 meth, FBO, MT ET Streets when needed


  14. #14
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    Click here to enlarge Originally Posted by 135idct Click here to enlarge
    will the twin scroll turbo help to hit higher hp at lower rpm?
    I hope so. We'll see when our 135i is done. Click here to enlarge
    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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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
    I hope so. We'll see when our 135i is done. Click here to enlarge
    waiting for ur 135i fftec dyno sheet, do ur best Click here to enlarge

  16. #16
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    The 135i won't be a dyno queen (we have the E92 for that) but I'm hoping once the trans issues are resolved it becomes a track monster. Click here to enlarge
    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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