N54 335i Twin turbo Borg Warner 6758 EFR

doublespaces

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Oct 18, 2016
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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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Kervio

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Jan 7, 2017
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I can't wait to see this thing running... Awesome to see this platform growing before our eyes
 

Libbe78

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Jan 26, 2017
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From speaking with him briefly on FB, he mentioned something about no ecu to make it work. Maybe @Libbe78 can elaborate?
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
 

jyamona

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Platinum Vendor
Nov 7, 2016
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Philly
I have a new EMU Black but im open for sugestions :D

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.
 

Libbe78

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Jan 26, 2017
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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.
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?
 

doublespaces

General of the Army
Oct 18, 2016
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2009 E93 335i
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?

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.
 

[email protected]

Lieutenant
Nov 5, 2016
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Bay Area
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.
 

[email protected]

Lieutenant
Nov 5, 2016
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@[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?
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