N54 335i Twin turbo Borg Warner 6758 EFR

Discussion in 'N54' started by doublespaces, Jan 26, 2017.

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  1. doublespaces

    doublespaces Administrator

    AZ
    2009 E93 335i
    Here is an awesome custom build in progress by @Libbe78 . He's waiting on turning. Exhaust is dual 3".


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  2. M&M'S

    M&M'S Lurker

    10
    Savage build , a true beast o_O
     
  3. doublespaces

    doublespaces Administrator

    AZ
    2009 E93 335i
    I wonder how long it will take for him to find a solution to the tuning.
     
  4. Kervio

    Kervio Private

    31
    I can't wait to see this thing running... Awesome to see this platform growing before our eyes
     
  5. jyamona

    jyamona Corporal Vendor

    What's so difficult about tuning it? If he is on here, have him contact me. We can tune it no problem.
     
  6. Abacus38

    Abacus38 Corporal

    190
    Tampa/Orlando, FL
    2007 Ti Ag 335i
    He can probably swap on the vaccum canister and use the stock system or just use the motiv boost box and a Mac valve
     
  7. Libbe78

    Libbe78 New Member

    4
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  8. doublespaces

    doublespaces Administrator

    AZ
    2009 E93 335i
    From speaking with him briefly on FB, he mentioned something about no ecu to make it work. Maybe @Libbe78 can elaborate?
     
  9. Libbe78

    Libbe78 New Member

    4
    Well I would like to keep the original box så I have my combimeter working. But I want to control the engine with my stand alone ecu. I bougth a JB4 but it seams like nobody here in Sweden know how to map with it. I want the tuner to know what they are doing to safely reach my hp goals
     
  10. V8bait

    V8bait Corporal

    What kind of stand alone are you currently using?
     
  11. Libbe78

    Libbe78 New Member

    4
    I have a new EMU Black but im open for sugestions :D
     
  12. jyamona

    jyamona Corporal Vendor

    All you will be able to use that for is PI control and boost control (if wanted). You can control boost with the stock ECU also, but you will need our converter to use a MAC solenoid.
     
  13. Libbe78

    Libbe78 New Member

    4
    And the cost of a tuning? better to skipp the DI and just run PI or it isnt possible to cut the fuel and warning in oem box?
     
  14. doublespaces

    doublespaces Administrator

    AZ
    2009 E93 335i
    If you can't get it working with a JB4, just use a boostbox with the DME. It can control boost actuated wastegates and you don't need a standalone or piggyback.
     
  15. jyamona

    jyamona Corporal Vendor

    Removing the DI is a horrible, horrible idea :)
     
  16. Tony@VargasTurboTech

    [email protected] Sergeant Vendor

    This is no different than our stage 3 kit as far as tuning. We did that 3 years ago, when the tuning was still in the stone age. We actually use those exact actuators on the kits people want boost controlled gates. Leave the stock DME in place, if you want flash only, run an external boost controller, or whatever jake has cooked up, prob not finished at this point. Or less optimal in my opinion throw a JB on it with single turbo firmware. If you want the best boost control with the most range, do what I did with our stage 3 kit on the shop car. Just fit the factory actuators instead of the EFR, very little fab work needed. Then you have 0-40PSI usable boost range, and any MHD tune will work perfectly. Done deal, tuning will not be an issues these days.
     
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  17. Tony@VargasTurboTech

    [email protected] Sergeant Vendor

    Example of a kit in similar spacing with the factory actuators retained. F0F5295C-97C1-4094-AA10-52FC74BC6E30.jpg
     
    Last edited: Jan 28, 2017
  18. CKI@Motiv

    [email protected] Specialist Vendor

    @[email protected] have you found a limit on the stock actuators egbp wise? I imagine the bigger the wg flapper surface area the less boost it will handle. Any luck finding larger ratio vacuum style wg actuators?
     
  19. Tony@VargasTurboTech

    [email protected] Sergeant Vendor

    I actually did some pretty serious testing on these, compared to others a while back. I would have to dig up my notes, but using a calibrated spring gauge, I would clamp these closed, and compare how hard it was to pull these open compared to very stiffly sprung boost actuated gates, think 19-22 psi cracking pressure, which means your low side boost range was very poor, but they would hold high boost. These hands down clamped at 22 in/hg which they see at 100% WDGC took much more pressure to pull, or push open than even the super stiffly sprung boosted gates. This is when I stopped messing around with trying to get boosted IWG's to work on the N54, and just embraced the factory system. A true 0 psi low side boost range, and harder to push open than a 20 psi sprung gate. Win / Win Basically I dont know the EBP when they would be blown open, but its extremely high, and other things would become serious issues if you were running that high of EBP
     
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  20. Any updates on this build?
     

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