[SeanWRT]

Some of us already know that our N55 turbo is a Borg Warner B03, which, to many, is a tad smaller than optimal for a 3.0L, given the fact that it's also well driven by the mighty 2.0T A45/CLA45 AMG.

It makes sense to seek turbo upgrades from Borg Warner. So this EFR line of theirs definitely has way better techs and will fit our engine. I noticed from google that a tuner by the name of ACF-Performance is already building a EFR 8374 based stage 3 turbo kit for N55, though it seems nobody has experience with it.

According to Borg Warner, its EFR line covers however much power N55 is possibly making. The best part is, much more power will be made with minimal lag from the techs like Ti blade and ball bearing catridges.

Have no idea how much a turbo kit like that can cost. Is anyone in the business working on it?

BorgWarner’s EFR turbochargers set new world standards in performance, convenient installation and high-tech features:

Ultra low-mass Gamma-Ti turbine wheels
Mixed-flow turbine blade design
Dual ceramic ball bearing cartridges
Aluminum bearing housing
Stainless steel turbine housing
Flexible orientation compressor cover
Forged milled compressor wheels
Integrated high-flow wastegate, boost control solenoid valve, speed sensor and compressor recirculation valve
Simple orientation

Compressors

Born from BorgWarner’s experience in highly boosted, highly efficient commercial engines, the compressors in EFR turbochargers offer exceptional efficiency, range/width and pressure ratio (boost) capability.

Range: 62 mm OD (~50 mm inducer) to 91 mm OD (~68 mm inducer)
Turbines

EFR turbine wheels are made from titanium aluminide (or Gamma-Ti). Not quite ceramic and not quite metal, the material is very light-weight and demonstrates excellent strength at high temperatures. Because EFR turbine wheels weigh 50% less than typical turbine wheels, less energy is required to spin up the wheel, allowing the turbocharger to respond faster. BorgWarner EFR turbochargers also feature the newest “super back” and “fullback” turbine designs for high-boost, high-efficiency applications.

Polish Range: 58 mm OD to 80 mm OD
Pairing

BorgWarner engineers pair compressors and turbines to maintain optimal flow for the fastest response. In addition, a range of turbine housing A/R’s are available so that you can dial in your desired power range based on your application.

The chart below displays the rated peak horsepower capability for each EFR turbocharger

[Whistlefist]

http://f30.bimmerpost.com/forums/sho....php?t=1343244

[Chicken_Joe]

ACF was the first to break the F chassis into the 650 whp range. Dejan_ knows something about ACF lol

[Jadar]

Originally Posted by Chicken_Joe

ACF was the first to break the F chassis into the 650 whp range. Dejan_ knows something about ACF lol

I honestly don't know what Ricardo had down in Brazil I'm not sure what type of numbers they got. In either case it really no longer matters as ACF does not exist anymore so it's all has been...

[SeanWRT]

@Dejan_

Any ball bearing turbo kits that efficiently makes 400-420whp like something in between PS1 and PS2?

I'm looking to upgrade without additional fueling. PS1 is too close to EWG stock turbo and a low boosting PS2 seems much less responsive than I like.

[Chicken_Joe]

Originally Posted by Dejan_

I honestly don't know what Ricardo had down in Brazil I'm not sure what type of numbers they got. In either case it really no longer matters as ACF does not exist anymore so it's all has been...

Really???

[Jadar]

Originally Posted by SeanWRT

@Dejan_

Any ball bearing turbo kits that efficiently makes 400-420whp like something in between PS1 and PS2?

I'm looking to upgrade without additional fueling. PS1 is too close to EWG stock turbo and a low boosting PS2 seems much less responsive than I like.

NOZ turbo has a kit with the borg warner casing in stage 2, 2+ and stage 3. It's ball bearing instead of journal like pure stage 1 and 2.

The stage 2 is something that also interested me as it's basically like a pure stage 2 but ball bearing. This is the last thing Ricardo (ACF) was working with before he went dark on us in the tuning world. TO be continued I guess....:

I don't have any feedback on it, the one person I know running a stage 2 is Alex up here in Chicago on his x4 but he's still tuning it.

Speedtech have you check them out? but super pricey.

[Jadar]

Originally Posted by Chicken_Joe

Really???

He hasn't been around since late February and in March his partner was informed that he's "selling" the company...not sure if he really did. A bit after that I saw an IG post with him in Taiwan working with NOZ, last thing I heard.

[Daleb]

Originally Posted by Dejan_

NOZ turbo has a kit with the borg warner casing in stage 2, 2+ and stage 3. It's ball bearing instead of journal like pure stage 1 and 2.

Do you know of a firm release date for these upgrades? The 2+ option sounds interesting and might fill that 550-600 gap between ps2 and the new stage 3 single kits.

[bradsm87]

They're great turbos. It's a shame they don't make them in reverse rotation which would make it easier to make an exhaust manifold and tidier for low mount.

[Jadar]

Originally Posted by Daleb

Do you know of a firm release date for these upgrades? The 2+ option sounds interesting and might fill that 550-600 gap between ps2 and the new stage 3 single kits.

I really don't. The only reason I knew anything about them is because of ACF that tuned my car was suppose to be working with them.

[SeanWRT]

Originally Posted by bradsm87

They're great turbos. It's a shame they don't make them in reverse rotation which would make it easier to make an exhaust manifold and tidier for low mount.

Garrett makes reverse rotation turbocharger that's for sure.

The problem is the lack of reputable tuners that invests serious R&D, makes well put together packages supporting different power levels and stand behind them, like AMS/Switzer does in GTR world.

[FSociety]

Yea SpeedTech has a 7670 http://www.speedtech.com/bmw-n55/
But still waiting on seeing some independent users

Waiting on my friend with an FBO M2 who's going to do some Dyno on his Bootmod3 and then Custom Tune to support his Big Boost Turbo 3.3 he ordered in may which is being built now. Don't think Big Boost uses BW though

Stage 3.1 (5459 turbo) capable of 470 whp
Stage 3.2 (5959 turbo) capable of 520 whp
Stage 3.3 (6159 turbo) capable of 620 whp
Stage 3.4 (6164 turbo) capable of 670 whp (NEW) it seems

http://www.n54tech.com/forums/showthread.php?t=44633

And just saw VTT post a message in another forum boost addict,

I would be a little patient. We are about to drop an N55 upgrade option, that is going to change the game just like we did with the N54. We have one currently installed, and going through testing. How does, 500-700WHP capable, stock spool characteristics, competitive price, no core charges sound? Too good to be true? Its not. Announcement coming in the next 1-2 months..

Someone asked him "EFR 7163 guts?" his response was "An EFR 7163 doesn't support 700WHP... That's a good guess though."

[bradsm87]

Originally Posted by SeanWRT

Garrett makes reverse rotation turbocharger that's for sure.

The problem is the lack of reputable tuners that invests serious R&D, makes well put together packages supporting different power levels and stand behind them, like AMS/Switzer does in GTR world.

Garrett don't have TiAl turbine wheels or decent investment cast twin scroll internal gate turbine housings though

I'd make the manifold etc myself if I was gonna do it. I don't care if it takes 10x more work to do a really good job. It's hard to have short runners and equal length, especially without reverse rotation. It's not impossible though. I just hate the slant BMW mount engines at.

[Chicken_Joe]

Originally Posted by FSociety

Yea SpeedTech has a 7670 http://www.speedtech.com/bmw-n55/
But still waiting on seeing some independent users

Waiting on my friend with an FBO M2 who's going to do some Dyno on his Bootmod3 and then Custom Tune to support his Big Boost Turbo 3.3 he ordered in may which is being built now. Don't think Big Boost uses BW though

Stage 3.1 (5459 turbo) capable of 470 whp
Stage 3.2 (5959 turbo) capable of 520 whp
Stage 3.3 (6159 turbo) capable of 620 whp
Stage 3.4 (6164 turbo) capable of 670 whp (NEW) it seems

http://www.n54tech.com/forums/showthread.php?t=44633

And just saw VTT post a message in another forum boost addict,

Someone asked him "EFR 7163 guts?" his response was "An EFR 7163 doesn't support 700WHP... That's a good guess though."

Boiii! Vargas not going in my car that shit gonna explode

[FSociety]

Originally Posted by Chicken_Joe

Boiii! Vargas not going in my car that shit gonna explode

LOL, well I wouldn't want to install a Turbo and then the shop all of a sudden disappear few months later or even before anything is accomplished after so much bragging and hype.

Right now I think BigBoost has the lead since its STG3 and Customer Service.

[Bmw doubles]

Originally Posted by FSociety

LOL, well I wouldn't want to install a Turbo and then the shop all of a sudden disappear few months later or even before anything is accomplished after so much bragging and hype.

Right now I think BigBoost has the lead since its STG3 and Customer Service.

I've heard NOT so good things about VTT too from local tuners in my area however I've heard nothing but great things about VTT's Game Changer setup. N54 I know, but I was the told it essentially comes down to increasing the housing, wheels and thrust bearings not just the wheels. A proper turbo not a modded stock. These same experienced tuners and installers have mentioned that even our beloved Pure eventually start smoking early due to pushing a stock turbo pasts its normal peak range and eventually seals go out.

I believe that regardless of your aftermarket turbo choice that if you replace the wheels for a bigger diameter then you should replace the bearings for something that can handle more heat like a 360 degree brass bearing if one can found for Borg Wagner.

Here's why:
http://turbolabofamerica.com/precisi...ring-failures/

[Chicken_Joe]

Originally Posted by Bmw doubles

I've heard NOT so good things about VTT too from local tuners in my area however I've heard nothing but great things about VTT's Game Changer setup. N54 I know, but I was the told it essentially comes down to increasing the housing, wheels and thrust bearings not just the wheels. A proper turbo not a modded stock. These same experienced tuners and installers have mentioned that even our beloved Pure eventually start smoking early due to pushing a stock turbo pasts its normal peak range and eventually seals go out.

I believe that regardless of your aftermarket turbo choice that if you replace the wheels for a bigger diameter then you should replace the bearings for something that can handle more heat like a 360 degree brass bearing if one can found for Borg Wagner.

Here's why:
http://turbolabofamerica.com/precisi...ring-failures/

Ask them how those gaskets are doing lol

[Bmw doubles]

Originally Posted by Chicken_Joe

Ask them how those gaskets are doing lol

Who Vargas?

[Chicken_Joe]

Originally Posted by Bmw doubles

Who Vargas?

Yes lol

[Bmw doubles]

Originally Posted by Chicken_Joe

Yes lol

I've never owned them, I just know from my installers tell me. VTT doesn't have a good rep for longevity. Minus the GC's from VTT.

Have you tried vargas?

[Chicken_Joe]

Originally Posted by Bmw doubles

I've never owned them, I just know from my installers tell me. VTT doesn't have a good rep for longevity. Minus the GC's from VTT.

Have you tried vargas?

I would not touch vargars with a 10ft pole man. Was considering a short term idea of running the Dinan big turbo in my car with the JB4 to see how the numbers would turn out with E85