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      08-26-2010, 06:28 PM   #1
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2011 BMW 535i Dyno Test Results Video

2011 BMW 535i (N55 motor) Dyno Test Video

Inside Line puts the new 2011 BMW 535i (N55 engine) on the dyno to see what kind of power it really makes.

277 rwhp@ 6100 RPM
283 rw lb-ft @ 4350 RPM


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      08-26-2010, 09:54 PM   #2
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Less than 10% loss! That is very good actually. Would love to see the chart though and see a 550i on a dyno. Thanks for the video.
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      08-26-2010, 11:13 PM   #3
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wish he would have dyno'd with hood closed....
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      08-27-2010, 08:40 AM   #4
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So....if I'm understanding this correctly...the N55 is more accurately rated @ 300hp, while the N54 was UNDERRATED. If that's correct, wouldn't this make N55 equipped cars a tad slower than their N54 counterparts?
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      08-27-2010, 09:42 AM   #5
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Quote:
Originally Posted by RichReg View Post
So....if I'm understanding this correctly...the N55 is more accurately rated @ 300hp, while the N54 was UNDERRATED. If that's correct, wouldn't this make N55 equipped cars a tad slower than their N54 counterparts?
Good observation, although I could imagine the difference to be seriously small. On the other hand, the N55 fuel economy should certainly make up for it.
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      08-27-2010, 10:02 AM   #6
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Thanks for the video.
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      08-27-2010, 10:16 AM   #7
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Is it me or does a loss lower than 10% seem unrealistic? I think so given that typical losses are in the range of 18 - 22%.

I am pretty sure this engine is underrated just as the N54. You are looking in the ballpark of 330 hp at the crank on this machine.
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      08-27-2010, 10:35 AM   #8
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Quote:
Originally Posted by RichReg View Post
So....if I'm understanding this correctly...the N55 is more accurately rated @ 300hp, while the N54 was UNDERRATED. If that's correct, wouldn't this make N55 equipped cars a tad slower than their N54 counterparts?

well i donno how accurate u can be while comparing the 2 motors. u have to get a 535i N54 put it on the same dyno with the same ambient temps and run them so u can have a control factor. cuz every dyno reads different numbers..

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      08-27-2010, 10:36 AM   #9
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Have a look at the 335i N55 dyno at the same facility:

http://www.e90post.com/forums/showthread.php?t=416803
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      08-27-2010, 10:56 AM   #10
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Quote:
Originally Posted by epiphone3 View Post
Is it me or does a loss lower than 10% seem unrealistic? I think so given that typical losses are in the range of 18 - 22%.

I am pretty sure this engine is underrated just as the N54. You are looking in the ballpark of 330 hp at the crank on this machine.
+1.. A true 300hp car should yield 235-250. Very impressive numbers for this "300hp" car.
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      08-27-2010, 12:41 PM   #11
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Those numbers means that the N55 is making 320-330HP and 330-340TQ.
Whats more interesting is that peak TQ occured higher in the RPM range than a N54 which was inline with the feeling i had driving the N55. The single turbo has 400-600rpm more lag than the smaller turbos.
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      08-27-2010, 12:53 PM   #12
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Could it just be that power loss is controlled much better through a more efficient build than your typical cars that you're dynoing with 20% losses? I'm sure it is still underrated but to say it is underrated by 30 or 40 hp is a bit crazy. What is the advantage for BMW?
couldn't they just say "class leading hp" by saying its a 340hp 3.0liter inline6 that still has good fuel economy?

I'm thinking it is probably making 310ish at the crank... but I would be surprised if it is much more than that.
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      08-27-2010, 01:06 PM   #13
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Quote:
Originally Posted by E90 Skye View Post
Could it just be that power loss is controlled much better through a more efficient build than your typical cars that you're dynoing with 20% losses? I'm sure it is still underrated but to say it is underrated by 30 or 40 hp is a bit crazy. What is the advantage for BMW?
couldn't they just say "class leading hp" by saying its a 340hp 3.0liter inline6 that still has good fuel economy?

I'm thinking it is probably making 310ish at the crank... but I would be surprised if it is much more than that.
The power loss usually occur from moving parts. There is no way around it unless you are using Carbon & Aluminum moving bits from the engine flywheel to the tires to reduce that loss, but you cant eliminate it.

Also, power loss is usually larger on an Automatic due to the TQ Converters they run. That why the figure on a Front Engine, Rear Wheel drive Auto is between 18-22%.
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      08-27-2010, 01:28 PM   #14
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that is not too bad. thanks for the info
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      08-27-2010, 02:22 PM   #15
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      08-27-2010, 03:33 PM   #16
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Quote:
Originally Posted by LSs1Power View Post
The power loss usually occur from moving parts.
Like the hydraulic pump for power steering? ... err, F10 doesn't have one.

Like the alternator supplying electricity? ... err, the F10 has a clutch on that, alternator doesn't generate when you're accelerating.....

They're both good engines, the N54 is in the 330hp range, the N55 is in the 300-310hp range.
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      08-28-2010, 01:21 AM   #17
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need a 550 dyno

Would love to see an F10 550 Dyno test. Some one on this forum has to make it happen...
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      08-28-2010, 01:51 AM   #18
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Originally Posted by tadtaggert View Post
Like the hydraulic pump for power steering? ... err, F10 doesn't have one.

Like the alternator supplying electricity? ... err, the F10 has a clutch on that, alternator doesn't generate when you're accelerating.....

They're both good engines, the N54 is in the 330hp range, the N55 is in the 300-310hp range.
I wasnt talking about the accessory items linked to the engine. I was talking about the delivery linkage from gears to TQ conveter to drive shaft to diff to half shafts to wheel bearings to wheels and tires and finally moving the weight on the ground.
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      08-28-2010, 07:23 AM   #19
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Originally Posted by epiphone3 View Post
Is it me or does a loss lower than 10% seem unrealistic? I think so given that typical losses are in the range of 18 - 22%.

I am pretty sure this engine is underrated just as the N54. You are looking in the ballpark of 330 hp at the crank on this machine.
I agree with this 100% as well. My N55 feels quite fast for what it is being rated at! I wouldn't call this a more accurately rated car when compared to the N54. It seems like both of them have been underrated, and based on higher HP applications that I have owned, this feels like 330-340hp.
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      08-28-2010, 07:24 AM   #20
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They're both good engines, the N54 is in the 330hp range, the N55 is in the 300-310hp range.
Based on what premises? This actually makes little sense. I have driven both and I own an N55...my N55 feels a tad quicker.
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      08-28-2010, 08:54 AM   #21
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Based on what premises? This actually makes little sense. I have driven both and I own an N55...my N55 feels a tad quicker.
Hmmm, I have driven both as well and is quite clear to me that the N54 is a lot more responsive (less lag) and is generally quicker. I was able to modulate a 6sp N55 a bit better than an automatic N55 (dreadful compared to an N54 automatic). However, the 6spd N54 walked on the 6spd N55. This discrepancy is made quite clear by BMW with the new 335is coupe and cab (fitted with the N54 engine and listed with 320hp and 332tq). These are the values N54 engine owners suspected were more realistic all along. The N55 stock does not possess the output that the stock N54 engine possesses and this has been confirmed with more realistic dyno tests.

From what I have read and having driven cars with both engines and auto/6spd combos this is as clear as day to me (the superior quickness/responsiveness of the N54). However, they are both fantastic engines and the N55 I suspect is much more economical and easy for BMW to handle (I believe the N55 runs cooler as well). I can only imagine how many buyers think they are getting the same engine though (twin turbo versus twin scroll terminology...). Clever marketing.

Anyway, Cheers!

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      08-28-2010, 12:08 PM   #22
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Hmmm, I have driven both as well and is quite clear to me that the N54 is a lot more responsive (less lag) and is generally quicker. I was able to modulate a 6sp N55 a bit better than an automatic N55 (dreadful compared to an N54 automatic). However, the 6spd N54 walked on the 6spd N55. This discrepancy is made quite clear by BMW with the new 335is coupe and cab (fitted with the N54 engine and listed with 320hp and 332tq). These are the values N54 engine owners suspected were more realistic all along. The N55 stock does not possess the output that the stock N54 engine possesses and this has been confirmed with more realistic dyno tests.

From what I have read and having driven cars with both engines and auto/6spd combos this is as clear as day to me (the superior quickness/responsiveness of the N54). However, they are both fantastic engines and the N55 I suspect is much more economical and easy for BMW to handle (I believe the N55 runs cooler as well). I can only imagine how many buyers think they are getting the same engine though (twin turbo versus twin scroll terminology...). Clever marketing.

Anyway, Cheers!
Interesting once again, given the lack of evidence/credibility. I'm not about to turn this into a "you say this, I say that argument", but allow me to address a few things:

1) The N54 engine on the 335is has a completely different tune than the standard N54 engine, because it actually includes the power package that BMW offers through its performance line. So, the 320hp and 332tq that you are referring to have nothing to do with "true" N54 engine power and prior underrating - what this means is that, even the 335is itself may possibly be underrated at these numbers and could indeed be making even more power than claimed thanks to better cooling and a better tune.

2) There is no way that the N55 is experiences more lag than the N54. Not only does BMW claim full torque achieved at 200 rpm's sooner with the newer engine, but I have actually compared them back to back. 2 turbo's to spool versus 1; new twin scroll technology, etc...it is a more advanced engine which achieves equal power and apparently more effortlessly while still improving gas consumption. There is nothing that your butt dyno can type on here that will disprove that, specially with BMW standing behind it. I highly doubt they are in for false advertisement either!

3) Lastly, I can't vouch for auto vs. manual because I have never owned an automatic car, and I refuse to for the time being, however, I hear that DCT mated to the N55 is incredibly quick, and not just that, but also quicker than the N54 car. In 6 speed, I do not know what you're talking about in terms of the N54 walking the N55. My car feels faster than the N54 I drove, and again, at the very least, it achieves full torque quicker which common sense will indicate that it will propel the car faster.

Again, you're entitled to your opinions just like I am to mine, but your statements have no credibility behind them other than "you drove them." At the very least I am citing BMW factual information, and this lovely video shows us how underrated the N55 engine is when it's dynoing so close to its crank rated power.

Cheers!

Edit: I forgot to touch on this part of the subject, but I'm very sure that most people going for the 2011+ models are well aware of the fact that the car has a single turbo now. Somehow I get the impression that you were making it sound like twin has an advantage over single, however, I come from long history with turbocharged applications and I can tell you that the greatest forced inducted machines out there are either running single turbos, or have been converted at one point or another from twin to single. Just look at the greatest supra's and rx7's out there...all converted to single and for multiple reasons: 1) less moving parts = less maintenance, 2) 1 turbo = cooler engine than 2 turbo's, 3) 1 single turbo is more efficient than 2 turbo's, and I'm sure I could keep going. I was actually very happy to know this and made me inclined to getting my 2011 over the left over 2010 that was sitting on the lot. It sounds better, gets better economy, has better/newer technology, and makes the same amount of power. By the way, sit tight and watch when aftermarket companies start developing for this engine - it's been proven throughout time that single turbo setups have a lot more potential than twin turbo setups when it comes to generating higher amounts of power than stock configuration.
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