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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > RB Turbo's N55 Turbo Upgrade, rounding the bases



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      08-05-2013, 09:51 AM   #1
Rob@RBTurbo
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RB Turbo's N55 Turbo Upgrade, rounding the bases

Hey Guys,

Havent posted over here yet but I guess it is time. We are working on a full turbo upgrade for the N55 engine. This will be based off of the Internally Wastegated Twin Scroll Borg Warner EFR turbo with options of 550, 650, and 750hp; which should satisfy most anyones goals with this platform.

There will be unknowns, of course, with this engine and how it can handle the extra airflow (power). It may not hold together with the larger options. We just will not know until it is tried and proven, that said an upgrade like this will not be for the faint of heart- although we have high hopes that the smallest option will work out well and be a great recipe for a terrifically fun car in pretty much every category. Just wanted to put that out there, as until it is done it is an unknown.

Anyway, the design and battle plan is figured out. Hopefully it all looks good and all of the concepts pan out in reality. We will have to see but again have high hopes.

We are working on machining all of the fittings, flanges, and the turbo is on hand as well. We have done some mocking up and like what we see with the fitment, and the manifold design is going to be very elegant as well. Installation, servicing, performance; has all been considered and we believe the setup will be one that is extremely sought after thanks to a simple yet effective modular design (which requires some very cool machined parts). The prototype kit will be using the smallest option of 550hp, and will likely be kicking out close to that at the wheel.

Anyway, here are a couple teaser shots. Will post more updates as things come along... but I will say I have not been this excited for quite a long time. This option for the N55 is going to be something very very extraordinarily cool.

The kit should be fairly affordable. We will do the best we can to keep it that way. But keep in mind the turbo cost itself starts at around $2400, so it will only go up from there. A bonus is that since this kit is not a hybrid solution, you will not have a need to send in your original turbo or be charged a core charge. You can either sell it to recoup some funds or keep it for if you ever wanted to go back to stock.

Thanks,
Rob
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      08-05-2013, 10:08 AM   #2
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Sub'd! Awesome update for us N55 guys! Warranty is up next summer, let the road to 500hp begin!
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      08-05-2013, 10:22 AM   #3
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What kind of power can the stock steptronic take?

If someone where looking to stay as stock as possible, like just a JB4 w/ E85 and upgraded turbo, how much gain can be expected(and will a FMIC be needed at this power)?
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      08-05-2013, 10:27 AM   #4
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Again. Not for the faint of heart. No one knows. We can assume the N55 Steptronic is just as capable as it was with the N54 (which is pretty good aside a couple hiccups in some isolated cases that are being addressed). Personally I'm more concerned about the actual N55 engine. We have no guarantees on any front about the rest of the car holding together, we simply are supplying the kit that will actually have the potential to provide the airflow necessary to make some real power. This rest is up to some pioneers ready to take on a challenge and put their bets on the N55 being a real performer.

Also, those interested in a kit like this likely would not be interested in also running the stock intercooler (although possible) as it is just not a good idea. When performance is your game, you really should do it all right IMO and this means not leaving very insufficient components in the system. In short, buy an Intercooler.

Thanks,
Rob

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Originally Posted by divisionbell77 View Post
What kind of power can the stock steptronic take?

If someone where looking to stay as stock as possible, like just a JB4 w/ E85 and upgraded turbo, how much gain can be expected(and will a FMIC be needed at this power)?
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      08-05-2013, 10:59 AM   #5
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Quote:
Originally Posted by divisionbell77
What kind of power can the stock steptronic take?

If someone where looking to stay as stock as possible, like just a JB4 w/ E85 and upgraded turbo, how much gain can be expected(and will a FMIC be needed at this power)?
FMIC should be 2nd or 3rd on the list after JB4 and maybe downpipes. I don't plan on changing to catless DP's but my next mod is definitely a FMIC to keep down those IATs so I can sustain the power for longer.
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      08-05-2013, 11:07 AM   #6
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I agree. A turbo setup is usually one of the last things to buy. But the N55 Stock turbo is pretty weak. The manifold and turbine housing are very insufficient as well, and the cost and hassle in modifying them into a hybrid just is not going to be worth it in the bang for the buck department IMO. The N55 needs serious help, and that means just scrapping the original unit altogether and moving into something like this.

Rob
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      08-05-2013, 01:05 PM   #7
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      08-05-2013, 01:53 PM   #8
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awesome. If you need beta tester for f30 n55 contact me!
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      08-05-2013, 02:12 PM   #9
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We will have to ultimately select a single beta tester. Have a feeling there be a lot of people pushing to do it honestly. Will need someone ready to move quickly. Stay subscribed for when we get there.
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      08-05-2013, 02:17 PM   #10
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Very Cool Rob. I can't wait to see the end result, I'm confident it will be great!
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      08-05-2013, 02:39 PM   #11
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Quote:
Originally Posted by Rob@RBTurbo View Post
We will have to ultimately select a single beta tester. Have a feeling there be a lot of people pushing to do it honestly. Will need someone ready to move quickly. Stay subscribed for when we get there.
I've got a 2013 E92 N55 production date 03/13 ready when YOU are. 6-spd trans, none of this steptronic nonsense.
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      08-05-2013, 02:48 PM   #12
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The concept is a very sound high end type setup. If all goes to plan it certainly will be amazing. Performing a lot CNC work helps make some of these things into much neater modular type of turbo systems.

As a sidenote the system will also work on an N54, or so it is intended, but will not market it that way until someone is able to combine the O2 signals such that a single O2 can handle the job for both banks.

Rob

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Very Cool Rob. I can't wait to see the end result, I'm confident it will be great!
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      08-05-2013, 02:52 PM   #13
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Any issues about this fitting the E9x and F3x cars? I love options! Is this a BB turbo?
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      08-05-2013, 03:01 PM   #14
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Shit just got real
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      08-05-2013, 03:31 PM   #15
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Quote:
Originally Posted by JETmn View Post
Any issues about this fitting the E9x and F3x cars? I love options! Is this a BB turbo?
This is a cutting edge Borg Warner EFR. That is an acronym for "Engineered For Racing." This turbo has more tech in it than any other out there.

You can do some reading on it here:
http://www.turbodriven.com/en/perfor...urbos/efr.aspx

The prototype kit will be using the EFR7064 with the twin scroll internally wastegated housing.

Being that this kit is a bigger single, and spool is always an issue with bigger singles (contrary to smaller twins), every little tech advantage helps tremendously.

Our kit will be taking a much different approach than others out there. We feel short runner modular fitting systems are advantageous and will be pursuing that route.

Rob
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      08-06-2013, 01:56 AM   #16
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Looks awesome Rob. Great work as always!! You N55 guys are in great hands. This is about to get real interesting with this motor.
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      08-06-2013, 02:23 AM   #17
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Quote:
Originally Posted by Rob@RBTurbo View Post
We will have to ultimately select a single beta tester. Have a feeling there be a lot of people pushing to do it honestly. Will need someone ready to move quickly. Stay subscribed for when we get there.
I am ready to move quickly. Have jb4, intercooler, and ordering downpipes this week. Dont think there are many full bolt on f30 n55s who live ten minutes away from terry from bms. Let me know what we can do
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      08-06-2013, 02:30 AM   #18
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Tuning is going to be key for this. I can't wait to see all the different options for the n55! If the bottom end can handle it, the N55 has better head, cams, and valves than the n54!
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      08-06-2013, 03:21 AM   #19
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Quote:
Originally Posted by 3000GT MR View Post
Looks awesome Rob. Great work as always!! You N55 guys are in great hands. This is about to get real interesting with this motor.
Limits will definitely be pushed.

I have to think that this engine cant take much more than the 550 kit without being built on the inside.

Any guess on which end will pop first, bottom or top?
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      08-06-2013, 05:28 AM   #20
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Quote:
Originally Posted by FOACAD
Quote:
Originally Posted by 3000GT MR View Post
Looks awesome Rob. Great work as always!! You N55 guys are in great hands. This is about to get real interesting with this motor.
Limits will definitely be pushed.

I have to think that this engine cant take much more than the 550 kit without being built on the inside.

Any guess on which end will pop first, bottom or top?
Its one of those things though. Did anyone expect the n54 to make 740 on a engine that has been beat with 680-700hp for thousands of miles? Sure it's forged but a lot has to do with materials and design. I bet the N55 will handle more than expected. I hope like the N54 other limitations are found before it grenades.

Haven't really looked at specs but who knows a n54 bottom end swap could be possible. 09-present have 6 bolt FW. Might be a cheap option. I wish the best for the N55 and to that badass turbo Rob brought to the forefront.
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      08-06-2013, 01:51 PM   #21
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What kind of power delay will there be with this turbo? I imagine there has to be some increase over stock.
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      08-06-2013, 01:52 PM   #22
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Quote:
Originally Posted by 3000GT MR View Post
Its one of those things though. Did anyone expect the n54 to make 740 on a engine that has been beat with 680-700hp for thousands of miles? Sure it's forged but a lot has to do with materials and design. I bet the N55 will handle more than expected. I hope like the N54 other limitations are found before it grenades.

Haven't really looked at specs but who knows a n54 bottom end swap could be possible. 09-present have 6 bolt FW. Might be a cheap option. I wish the best for the N55 and to that badass turbo Rob brought to the forefront.
The n54 does not have forged internals. This was beaten to death over and over again in this very forum.
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