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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > B58 in X3 M40i

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      06-28-2017, 12:25 AM   #1
braves716
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B58 in X3 M40i

Anyone feel like The rest of the line up creaping up in terms of power output to M2? Of course, M2 will be more fun and dynamic even with N55, but B58 seems to be the standard now. Maybe B58 2019? Or is CS meant to fill that increased power void? Thoughts?
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      06-28-2017, 06:29 AM   #2
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What is it with this obsession with power ratings between cars?

You can cram as much power into a car as you want, doesn't mean it'll drive any better. Just go ask Lotus.
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      06-28-2017, 06:55 AM   #3
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Unless you're drag racing the car, the difference will feel negligible on road

Plus, let's not forget that the M2 is a small coupe... too much power will make it unstable and ruin the ride
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      06-28-2017, 07:59 AM   #4
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Love the n55, why do many seem anxious for something else?
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      06-28-2017, 08:08 AM   #5
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Quote:
Originally Posted by six-n-twins53 View Post
Love the n55, why do many seem anxious for something else?
A few years back, C&D stated the engine in the 335i/435i (N55) was the best engine in a car costing up to $100k. This was just prior to the M3/4 being released (S55). But still, it spoke volumes. The N55 is butter smooth and pulls seamlessly. It's hampered power-wise only by the small turbo BMW uses.
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retired: 2014 435xi|MPPK|335 bhp|3/5 stars
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      06-28-2017, 08:09 AM   #6
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Quote:
Originally Posted by auf Deutsch View Post
A few years back, C&D stated the engine in the 335i/435i (N55) was the best engine in a car costing up to $100k. This was just prior to the M3/4 being released (S55). But still, it spoke volumes. The N55 is butter smooth and pulls seamlessly.
Agree! Sounds great, pulls for days....
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      06-28-2017, 08:16 AM   #7
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      06-28-2017, 08:55 AM   #8
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“The M2 is a perfectly balanced car, a throwback to Ms of yesteryear” - General Consensus

“OMG can we put a newer or bigger engine in it for more power????” - The Confused
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      06-28-2017, 10:33 AM   #9
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Quote:
Originally Posted by OCfromOC View Post
“The M2 is a perfectly balanced car, a throwback to Ms of yesteryear” - General Consensus

“OMG can we put a newer or bigger engine in it for more power????” - The Confused
Agreed! I did my EuroDelivery and I enjoyed the engine and its power it possesses. An absolute hoot to drive.
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      06-28-2017, 01:00 PM   #10
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Quote:
Originally Posted by six-n-twins53 View Post
Love the n55, why do many seem anxious for something else?
This is going to be repeat of LCI where when people complain about the earlier version of the car people will point out they should be happy with the current M2.... Cut to when LCI comes out and several posts of "I'm so glad I waited so I could get the LCI xyz!"

2019 will be the same. Today people saying be happy with the N55. 2019 rolls around "OMG so glad I waited for 2019 engine!" or "I wish I would have waited!"
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      06-28-2017, 02:18 PM   #11
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B58 is certainly a better motor than the N55. You guys are just demonstrating confirmation bias. I have a September delivery of an M2 but I can still recognize an amazing motor. When (not IF) it finds its way into the M2, we'll see lots of tuning headroom thanks to a motor that runs fundamentally cooler and has a bigger turbo.
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      06-28-2017, 02:29 PM   #12
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Quote:
Originally Posted by stefan View Post
B58 is certainly a better motor than the N55. You guys are just demonstrating confirmation bias. I have a September delivery of an M2 but I can still recognize an amazing motor. When (not IF) it finds its way into the M2, we'll see lots of tuning headroom thanks to a motor that runs fundamentally cooler and has a bigger turbo.
I'm not knocking the B58 by any means, it's a great little engine.

My issue is with the "more power = better" attitude. People who think that have never driven a Lotus.
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      06-28-2017, 02:56 PM   #13
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Here's the thing....even if they shoved a B58 in the M2 with the same power level, you think most people would notice ANY difference? Probably not. Unless you plan on upping the power yourself you're not missing anything.
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      06-28-2017, 02:59 PM   #14
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Quote:
Originally Posted by PackPride85 View Post
Here's the thing....even if they shoved a B58 in the M2 with the same power level, you think most people would notice ANY difference? Probably not. Unless you plan on upping the power yourself you're not missing anything.
IF you're on these boards you're probably at least a little bit interested in tuning. The B58 makes the same power and torque as the N55 (albeit without overboost limitation) but can make a whole ton more with a very mild tune unlike the N55, something tuners figured out very quickly with 340s.
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      06-28-2017, 06:08 PM   #15
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Quote:
Originally Posted by stefan View Post
IF you're on these boards you're probably at least a little bit interested in tuning. The B58 makes the same power and torque as the N55 (albeit without overboost limitation) but can make a whole ton more with a very mild tune unlike the N55, something tuners figured out very quickly with 340s.
The best thing bmw could do to improve this car is sort the brakes and soften the rear end a bit so it complies a bit better on rough roads... That's all... The N55 is great the B58 is great but I agree that the chassis and engine are near perfect harmony.

I ran 415hp for a while and the car was not as fun as when It was stock, sure the power was good straight line, but stock tune (I also have Fabspeed DP) is great. I still have the 415hp on tap but if I'm out driving hard on the back roads I run stock setting every time.
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      06-28-2017, 07:44 PM   #16
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X4 M40i essentially has close to the same output, 10hp less and no overboost, but damn it drives nice. Kind of unbelievable for that kind of a vehicle. Understeers a little too much though.
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      06-28-2017, 08:44 PM   #17
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Quote:
Originally Posted by stefan View Post
B58 is certainly a better motor than the N55. You guys are just demonstrating confirmation bias. I have a September delivery of an M2 but I can still recognize an amazing motor. When (not IF) it finds its way into the M2, we'll see lots of tuning headroom thanks to a motor that runs fundamentally cooler and has a bigger turbo.
No one here is saying that the B58 is not a superior engine.

We are saying “what does it matter? Be happy with what you have now or you’ll be waiting forever for the perfect thing”

The 2040 M2 is going to have 200000HP and a fully autonomous mode and it will buy you pizza. Now I’d probably wait for that!
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      06-28-2017, 10:24 PM   #18
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      06-29-2017, 01:19 AM   #19
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Balance theory doesn't apply here.

10+ years ago F430 was just as quick as m2 is today in a drag. At the moment it's regarded as the car in perfect balance. Until 458 came.

If m2 is in less need for power, funny how could pedestrian(comparatively speaking) compact sedan and SUV need more power?

BMW fails big time not putting a B58 turbo into M2 N55, all it takes are 1) matching a turbofold that fits and 2) ask supplier to make a 15% bigger intercooler. They're really expensive from a material management perspective, but after all the no love, M2 deserves at least that, doesn't it? No mention, R&D in tuning a bigger turbo N55 would be even easier - same power achieved with less boost, less maxed out, less reliability problems.

Damn, I own a m2.
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      06-29-2017, 05:05 AM   #20
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Ah, the, if a little is good, then a lot must be better theory. Having owned a few 5 and 600 to cars, balance is the key to the m2. Bigger turbo, more lag. More boost, more fuel. Goes on and on. Change enough things and it becomes a different car. Loses some magic
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      06-29-2017, 07:19 AM   #21
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For all those getting pissy the OP has a valid point. It's not the engine code or power rating it's the performance. The X3 M40 whatever it's called, M my ass, does 0-60 in 4.6s. Staggering performance for a 4000 plus pound vehicle. I love my M2 but it's not blowing away any X3. In fact the performance gap is so tight that there are many other BMWs Audis and MBs it ain't blowing away either. Yeah yeah dynamics and feel blah blah I still want to know I can dust most cars on the road when I feel like it. These days try shaking a minivan.
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      06-29-2017, 07:21 AM   #22
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Quote:
Originally Posted by m34m View Post
For all those getting pissy the OP has a valid point. It's not the engine code or power rating it's the performance. The X3 M40 whatever it's called, M my ass, does 0-60 in 4.6s. Staggering performance for a 4000 plus pound vehicle. I love my M2 but it's not blowing away any X3. In fact the performance gap is so tight that there are many other BMWs Audis and MBs it ain't blowing away either. Yeah yeah dynamics and feel blah blah I still want to know I can dust most cars on the road when I feel like it. These days try shaking a minivan.
Isn't that because it is AWD vs RWD on the M2?
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