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      10-02-2014, 12:04 PM   #1
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N55B30T0 vs. N55B30O0 - what will be the differences?

So, as the title states, I am wondering what you all think about what the N55B30T0 (M2 engine code) will contain vs. N55B30O0 (M235 engine code).

According to the naming designation chart imbedded below, the only difference in the designation relates to "output". We have been told that the M2 will push around 360-370 BHP.

We have also seen some respectable opinions that the M235 N55 cannot push beyond 360 BHP reliably.

http://www.2addicts.com/forums/showt...ckelone&page=6

So what gives, in your opinion? What will BMW do to the N55 to hit that mark?
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      10-02-2014, 12:19 PM   #2
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Make the N55 breathe more..


The M2's engine will be about headers & intake. The n55 is a strong engine, but it needs some throttle control and more legs. Allowing for a slightly larger twin-scroll offset... & all forged internals for durability & strength.
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      10-02-2014, 12:26 PM   #3
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difference is a "T"
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      10-02-2014, 12:28 PM   #4
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Quote:
Originally Posted by w3rkn View Post
Allowing for a slightly larger twin-scroll offset... & all forged internals for durability & strength.
I hope the notion that this engine starts with an "N" and not an "S" does not mean that they won't change the engine internals! I think less than 360-370hp would be a disappointment given where the market will be in 2016.
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      10-02-2014, 12:51 PM   #5
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Quote:
Originally Posted by w3rkn View Post
Make the N55 breathe more..


The M2's engine will be about headers & intake. The n55 is a strong engine, but it needs some throttle control and more legs. Allowing for a slightly larger twin-scroll offset... & all forged internals for durability & strength.
One thing CHack and I have talked about is whether the turbo is the "weak point" of the N55. Perhaps the twin scroll is good for efficiency and whatnot, but not best for the kind of low-lag, but good power set up?

Hence why the S55 went back to two turbos, ala N54???

Quote:
Originally Posted by pikcachu View Post
difference is a "T"


I was hoping we could get a little further than that.
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      10-02-2014, 12:56 PM   #6
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Quote:
Originally Posted by vantagesc View Post
I hope the notion that this engine starts with an "N" and not an "S" does not mean that they won't change the engine internals! I think less than 360-370hp would be a disappointment given where the market will be in 2016.
Well...that's really what I am hinting at. If you look at the thread I posted the link to above, you can see that there is some consensus that the N55 in the M235 (with higher output than a standard N55), can't take more than 360 BHP reliably.

And we have heard that's in the range of what the M2 will produce...

So...we could be getting an M235 N55 that has been dialed up with more boost and maybe better cooling. Aka - not that special.

But if they spend considerable time making the squishy suspension better, that will go a long way in my mind.
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      10-02-2014, 01:01 PM   #7
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Quote:
Originally Posted by vantagesc
Quote:
Originally Posted by w3rkn View Post
Allowing for a slightly larger twin-scroll offset... & all forged internals for durability & strength.
I hope the notion that this engine starts with an "N" and not an "S" does not mean that they won't change the engine internals! I think less than 360-370hp would be a disappointment given where the market will be in 2016.
370hp with great handling is no disappointment imo
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      10-03-2014, 01:57 AM   #8
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Quote:
Originally Posted by dmboone25
Quote:
Originally Posted by w3rkn View Post
Make the N55 breathe more..


The M2's engine will be about headers & intake. The n55 is a strong engine, but it needs some throttle control and more legs. Allowing for a slightly larger twin-scroll offset... & all forged internals for durability & strength.
One thing CHack and I have talked about is whether the turbo is the "weak point" of the N55. Perhaps the twin scroll is good for efficiency and whatnot, but not best for the kind of low-lag, but good power set up?

Hence why the S55 went back to two turbos, ala N54???

Quote:
Originally Posted by pikcachu View Post
difference is a "T"


I was hoping we could get a little further than that.
He might be on to something.

It might stand for larger turbo.
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      10-03-2014, 02:20 AM   #9
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I suppose one way to reliably predict the increased estimated output difference from the M235 and the M2 is to establish an average ratio of differences between past "O" (Upper Output) engines and "T" (Top Output) engines of the same class (e.g., 335 vs. M3, 135 vs. 1M, 550 vs. m5, etc.).

This is assuming BMW will follow suit with this average "O" to "T" increase.

Has anyone done this before?
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      10-03-2014, 08:06 AM   #10
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Has there ever brought an N engine up to the T output class before? I thought they were all O output class thus far.
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      10-03-2014, 08:37 AM   #11
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Quote:
Originally Posted by MikeASU09 View Post
I suppose one way to reliably predict the increased estimated output difference from the M235 and the M2 is to establish an average ratio of differences between past "O" (Upper Output) engines and "T" (Top Output) engines of the same class (e.g., 335 vs. M3, 135 vs. 1M, 550 vs. m5, etc.).

This is assuming BMW will follow suit with this average "O" to "T" increase.

Has anyone done this before?
It's funny you mention that - we had this exact same conversation yesterday and were wondering the same thing.

I know I don't have that info, maybe a little weekend homework.
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      10-03-2014, 08:39 AM   #12
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Quote:
Originally Posted by red-sauerkraut View Post
He might be on to something.

It might stand for larger turbo.
That would make some sense, right? It would not be an "S" engine, but would be distinctly differentiated from the N55 that you see in a regular series or M performance BMW.

Would also likely mean that there would be more power on tap for those willing to look for it.
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      10-03-2014, 08:45 AM   #13
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Quote:
Originally Posted by vantagesc View Post
I hope the notion that this engine starts with an "N" and not an "S" does not mean that they won't change the engine internals! I think less than 360-370hp would be a disappointment given where the market will be in 2016.
Claimed 360-370 crank hp will probably mean 360-370 whp, considering all BMW turbo engines are underrated. That is plenty IMO.
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      10-03-2014, 10:39 AM   #14
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Quote:
Originally Posted by bimmerbuff View Post
Has there ever brought an N engine up to the T output class before? I thought they were all O output class thus far.
Answered my own question after doing some quick searching. Looks like the diesel N47 and N57 has U, O, and T variants.
The gasoline N54 has O0, O1, and T0 variants. The T0 was used in the 1M and Z4 is.

Wikipedia (could be accurate ) shows these specifications for the N54: http://en.wikipedia.org/wiki/BMW_N54#Specifications
Not much of a spread in power between the O1 and T0.

Last edited by bimmerbuff; 10-03-2014 at 08:36 PM.. Reason: O for 0
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      10-03-2014, 12:45 PM   #15
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Quote:
Originally Posted by dmboone25 View Post
It's funny you mention that - we had this exact same conversation yesterday and were wondering the same thing.

I know I don't have that info, maybe a little weekend homework.
Glad this point has been brought up before - definitely one worth investigating. I too may look further into this.
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      10-07-2014, 11:05 AM   #16
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Quote:
Originally Posted by MikeASU09 View Post
Glad this point has been brought up before - definitely one worth investigating. I too may look further into this.
So bimmerbuff brought up a great point in a PM to me...

What if we were to somehow get the N54B30T0? That's the engine in the 1M, 335is, and Z4is. 335 BHP, up to 370 ft. pounds with over-boost function.

Think of what an awesome car THAT would be -

Better looking than 1M (and that's saying something);
New M3/4 suspension and brakes (booyah);
Things you can't get on M235 - HUD, LED lights, CF roof, etc.
Updated interior (maybe some special stitching?)
HUGE tuning potential.

My god, what a car that would be...

BMW are you listening ????
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      10-08-2014, 07:55 AM   #17
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Quote:
Originally Posted by dmboone25 View Post
BMW are you listening ????
Almost sounds like a no-brainer, so they're probably not.
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      10-08-2014, 11:19 AM   #18
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maybe some bits of the S55 on this new N55 engine
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      10-09-2014, 02:00 AM   #19
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To stay optimistic about the currently believed motor that'll be going into the M2...

1.) It has indefinitely and forever put the 4 cyl rumors to rest

2.) Who knows, this motor could be as punchy with an even greater tendency for reliability?
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      10-09-2014, 08:37 AM   #20
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So our cars don't have direct injection according to this chart? because i am pretty sure they have both valvetronic and DI...

Should the engine be called N58?

also the N54 had valvetronic just not second generation form what i understand?

Is this chart still accurate?
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      10-09-2014, 09:03 AM   #21
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Quote:
Originally Posted by Killramos View Post
So our cars don't have direct injection according to this chart? because i am pretty sure they have both valvetronic and DI...

Should the engine be called N58?

also the N54 had valvetronic just not second generation form what i understand?

Is this chart still accurate?
I can't answer whether the chart is accurate to that level of specificity - but it's a good question.

In terms of the N55B30T0, the engine in the 1M was also only designated as "0T0" in terms of differences to the original N54. By analogy, if the "0T0" version of the N55 is that much better than the one we have in the M235, perhaps the M2 will be very good.

I am still not holding my breath...
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      10-09-2014, 09:08 AM   #22
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Quote:
Originally Posted by dmboone25 View Post
I can't answer whether the chart is accurate to that level of specificity - but it's a good question.

In terms of the N55B30T0, the engine in the 1M was also only designated as "0T0" in terms of differences to the original N54. By analogy, if the "0T0" version of the N55 is that much better than the one we have in the M235, perhaps the M2 will be very good.

I am still not holding my breath...
Yea i was also under the impression that our engine was referred to as N55HP?

Due to the strengthened internals mostly, only on the M performance models. Are the engines stamped with their code? Has anyone checked?

Also from what i have read it was only 10 kW difference in output 0o0 to 0T0
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