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  1. #126
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    Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
    Are you looking at the power difference up top? Stock turbo is down to around 330ish whp at 6.5k whereas the VTT2 is around 440. Pretty darn close to 120hp over a maxed out stock turbo in kill mode. I guess i never realized how pathetic the stock n55 turbo is up top.
    Yes it's simply awful. Even mild tunes routinely run 100% duty cycle over 5000rpm.
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  2. #127
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    Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
    Are you looking at the power difference up top? Stock turbo is down to around 330ish whp at 6.5k whereas the VTT2 is around 440. Pretty darn close to 120hp over a maxed out stock turbo in kill mode. I guess i never realized how pathetic the stock n55 turbo is up top.
    yeah i got confused with the wording, it sounded like stock turbo stock tune and all no tune, 330WHP sounded a bit high. but stock turbo with a tune makes sense Click here to enlarge

    Click here to enlarge Originally Posted by curare Click here to enlarge
    I think its about 80whp over FBO+meth? Their car made about 390hp prior to the upgrade right?
    not sure what it made at most before, all i know is it's finally getting to where it should be! Click here to enlarge
    boop

  3. #128
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    Click here to enlarge Originally Posted by maxnix Click here to enlarge
    It's not as bad as BMW tunes it. Nowhere near the back pressure as on the N54 twin turbos.
    You can preach about back pressure all you want, $#@! just doesn't make power bro. No need to get mad.
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  4. #129
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    Click here to enlarge Originally Posted by maxnix Click here to enlarge
    1024 bit RSA encryption is very difficult to break. We'll see. No one else has done it yet.
    With so much potential with any turbocharged engine and now that we see N55 engine is proving to be very potent engine. I can assume few years from now, someone will fill the demand for stock DME tuning.

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    Click here to enlarge Originally Posted by Flinchy Click here to enlarge
    yeah i got confused with the wording, it sounded like stock turbo stock tune and all no tune, 330WHP sounded a bit high. but stock turbo with a tune makes sense Click here to enlarge



    not sure what it made at most before, all i know is it's finally getting to where it should be! Click here to enlarge
    Its not just 120 hp over a stock turbo with a tune

    its 120 hp over stock turbo with JB4 + Cobb back end flash, down pipes, e85 + meth so FBO

    The fbo stock turbo car made 390 peak but fell off hard uptop to 330 at 6.5K rpm

  6. #131
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    Click here to enlarge Originally Posted by ezec63 Click here to enlarge
    Its not just 120 hp over a stock turbo with a tune

    its 120 hp over stock turbo with JB4 + Cobb back end flash, down pipes, e85 + meth so FBO

    The fbo stock turbo car made 390 peak but fell off hard uptop to 330 at 6.5K rpm
    sorry i meant FBO+tune yes... 120whp is definitely a respectable figure first go with just the turbo upgraded for sure!
    boop

  7. #132
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    Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
    You can preach about back pressure all you want, $#@! just doesn't make power bro. No need to get mad.
    I'm cool and have no idea what "$#@!" is nor why it doesn't make power.

    If you don't understand the problems of back pressure on the N54 turbos, that's your loss, not mine.

    Peace, love, happiness.

  8. #133
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    Click here to enlarge Originally Posted by hakentt Click here to enlarge
    With so much potential with any turbocharged engine and now that we see N55 engine is proving to be very potent engine. I can assume few years from now, someone will fill the demand for stock DME tuning.
    With the JB4 the only things we can't easily do on the tuning end are set advance higher than the OEM maximum setpoint or retime the valvetronic. With the OEM & Vargas turbo OEM maximum setpoint is pretty close to MBT for E85. So I don't think there is much in there with more timing. On the N54 we picked up 4-5hp with VANOS tuning so maybe that or double it can be had once we can retune the valvetronic? Not holding my breath there for much either.

    http://www.n54tech.com/forums/showpo...25&postcount=1
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  9. #134
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    Click here to enlarge Originally Posted by maxnix Click here to enlarge
    I'm cool and have no idea what "$#@!" is nor why it doesn't make power.

    If you don't understand the problems of back pressure on the N54 turbos, that's your loss, not mine.

    Peace, love, happiness.
    I mean, back pressure is back pressure, right? Does the N54 have some special back pressure? Are you saying that the N55 turbo at "full retard" somehow magically doesn't produce back pressure? If we could somehow magically apply the wastegates of all 3 turbos to the same position and measure backflow, would the N55 turbo not produce as much back pressure? I'm really trying to understand the baseless argument here. I've seen empirical data on the back pressure of upgraded stock frame turbos for the N54, do you have the same data for the N55 oem turbo?
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  10. #135
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    Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
    I mean, back pressure is back pressure, right? Does the N54 have some special back pressure? Are you saying that the N55 turbo at "full retard" somehow magically doesn't produce back pressure?
    Yes, exactly. This limits the flow of the stock N54 turbos at higher RPM. The N55 has a larger housing and better flow and back pressure is not a problem at higher RPM. It is rather the small compressor turbine. Since Tony seems to be using OEM housing which are modified and increasing the size of the compressor turbine, it stands to reason he is seeing the success he is. As I understand it, similar efforts with the N54 were not so successful because of the impeller housing limitations. completely new turbos are required for credible gains, especially at higher RPM.

    I know someone who does have that data graphed. If they let me publish it, I will in a new thread.

    Now back to the N55 and Terry's efforts to tune Tony'w excellent upgrade.

  11. #136
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    Hey guys,

    Got the JB4 N55 3.5 bar TMAP sensor programming done and did some more tuning with the car. Spent around 2hrs on the dyno trying various combinations as high as 25psi (which was as high as the turbo would go) and as high as 11 degrees total advance. But ultimately settled on a set of curves I felt comfortable with as a "street" setup and another more aggressive setup as a "track" setup. In all the various tests done 475rw was the highest power output reached. Levels over 23psi showed basically no gain and from 21 to 23psi keeping advance the same showed only a marginal gain. Compared to the "street" setup the "race" combination of more boost and more timing resulted in around 15rw more throughout the curve.

    Click here to enlarge

    Click here to enlarge

    Click here to enlarge
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  12. #137
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    Thanks for the update terry. Why not target a higher redline than 17psi?

  13. #138
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    In other runs I targeted 21psi at redline but the turbo would only produce 19psi and made the same power as it did at 18psi. So it was definitely beyond its efficiency curve there. The car should be shifted around 6200rpm to maximize power under the curve during a race.
    Burger Motorsports
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  14. #139
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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
    Hey guys,

    Got the JB4 N55 3.5 bar TMAP sensor programming done and did some more tuning with the car. Spent around 2hrs on the dyno trying various combinations as high as 25psi (which was as high as the turbo would go) and as high as 11 degrees total advance. But ultimately settled on a set of curves I felt comfortable with as a "street" setup and another more aggressive setup as a "track" setup. In all the various tests done 475rw was the highest power output reached. Levels over 23psi showed basically no gain and from 21 to 23psi keeping advance the same showed only a marginal gain. Compared to the "street" setup the "race" combination of more boost and more timing resulted in around 15rw more throughout the curve.

    http://www.PorscheBoost.com/images/i...c1d13897-1.jpg

    http://www.PorscheBoost.com/images/i...c1d13897-1.jpg

    http://www.PorscheBoost.com/images/i...c1d13897-1.jpg
    Awesome results! Thanks Terry for taking the time to get that all programmed up and running. I have a feeling these actuators on the N55 are being pushed open as the BP rises, I've been testing more as cores come in and they are pretty weak to he honest. So basically we have a double whammy of BP starting to build and as it rises it's pushing the flapper open. I found a boost controlled actuator I think would work perfectly. But honestly I am not sure thete is tuning to control a boost actuated gate on the N55 right now. All in all we are very happy with 475 / 509 and excited to see more happy N55 customers keeping up with the N54's....Click here to enlarge As things on the N55 progress I think we will see a lot more cool stuff just like with the N54.

  15. #140
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    Thanks. It's running pretty well. Definitely can kill any stock turbo N54 now. Maybe even some mildly tuned hybrid turbo N54s.. Click here to enlarge
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  16. #141
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    475whp and 509wtq is very respectable. Good work guys!
    Click here to enlarge
    FBO's. Spec S2+. E85.

  17. #142
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    Terry! You linked to the images rather than manually importing for a cleaner look, I'm proud of you Click here to enlarge

    Ok so what I don't understand is why didn't the higher boost numbers give higher peak figures?

    I mean this is a new record although it only differs by a handful of hp and torque from what you hit previously.

  18. #143
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Terry! You linked to the images rather than manually importing for a cleaner look, I'm proud of you Click here to enlarge

    Ok so what I don't understand is why didn't the higher boost numbers give higher peak figures?

    I mean this is a new record although it only differs by a handful of hp and torque from what you hit previously.
    There were questions about how the turbo might perform at higher boost levels so we cranked the boost up just to fully explore that area. Although the initial tuning wound up being close to where we'd like to run it at least now we know for sure. Click here to enlarge
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  19. #144
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    Yeah, unfortunately that will not work on the ECU used in the newer DME.

  20. #145
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    Hello Tony, and Tony . How are you?

    I have been following your company for about two years and its not easy when I live in Chile. Every mod means a huge hastle to bring it to my country, pay the taxes, find a mechanic that will do it, etc...


    I live in Chile but I am travelling for my sisters graduation on May 25 until June 2nd and want to bring the N55 Stage 2 Hybrid Upgrade [VTT-N55-STG2] with my back on the plane, so I want to purchase it now. So if you could please answer the following questions I would really appreciate it.


    Just for the record, my car is the following:


    2011 BMW 135i N55
    BMS Chargepipe
    FMIC
    Catless DP
    Injenn CAI
    Jb4 Stage 2
    OCC

    • Size and weight of total kit, to know if I can take it on the plane suitcase
    • Is there any other hardware or anything at all I would need to purchase for this kit? (gaskets, forge, lsd, seals, ect...) If not, is there hardware that you RECOMMEND to change, or do you provide any upgraded HFPF for example, etc?
    • In the SIZE selection, what the difference between the SMALL, MEDIUM, LARGE, etc options when buying the kit?
    • What is the availabily, when can you have it shipped? (hopefully asap for the days mentioned above in Boston)
    • How hard is the install to do at home? As far as tools, space, etc.
    • I havent seen too many 135i with this kit. Is there a reason behind this, like space?
    • Is this fully compatible with a 135i?
    • I am planing on keeping my core until I sell the car (two years aprox) Is there a limit on time to return the core, or would you accept it 2 years later?
    • What advantages do you consider you have over the RBs turbos for n55 that is almost launched?
    • Do you now include part 1165793303 – 6
    • Im sure you saw this issue, but how can I avoid it? It has to do with the turbo spitting out oil. e90post.com/forums/showthread.php?t=976996
      • Im with you on this, and they are talking about an N54. Is the N55 prone to the same issues, or have you upgraded or changed something that avoids those issues completely?

    • Do these kits come with the CHRA upgraded? Any way to upgrade it if not? Since this is a problem with your kits
    • What about the thrust and billet upgrade? upgraded bearings?
    • Do i need COBB or is my JB4 set up enough?
    • Any fuel shortage problems and how to resolve them?

    Thank you guys for your time and hard work!



  21. #146
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    Please keep your questions in one thread.
    Chrome Space Bar Issue: http://www.boostaddict.com/showthrea...338#post738338


    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

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