10-29-2013, 10:46 AM | #1 |
First Lieutenant
53
Rep 379
Posts |
M versus N55
Hi all:
I'm curious what the differences are between the M-edition engine and the N55. Obviously the N54 uses twin turbos while the N55 uses the twin-scroll single turbo. How would a Dinan-modified N55 compare to an M power-wise? Stage 2 software, upgraded IC, upgraded oil cooler on the N55. Thanks!
__________________
Living the 1-life since 2013.
|
11-05-2013, 05:58 PM | #2 | |
Supreme Allied Commander
3890
Rep 54,576
Posts
Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com
|
Quote:
N54 vs N55? Dual vs single turbo is the biggest difference. |
|
Appreciate
0
|
11-05-2013, 11:42 PM | #4 |
Supreme Allied Commander
3890
Rep 54,576
Posts
Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com
|
|
Appreciate
0
|
11-06-2013, 03:47 AM | #5 |
European Editor
10633
Rep 22,992
Posts |
A tuned N55 can make stock level 1M power, but not much more. Most tuners say the N55 is good for about 360 Hp while a tuned N54 can easily crack the 400 Hp level.
__________________
|
Appreciate
0
|
11-06-2013, 04:19 AM | #6 |
Joint Chiefs of Staff
24477
Rep 191,448
Posts |
Tuned N55 can make the same power as a Stock M ( Depending on what M power you are talking about of course)
__________________
Check out our current sale by clicking on this link!
https://x-ph.com/sale/ Phone number 702-494-9435 |
Appreciate
0
|
11-06-2013, 10:43 AM | #7 |
Supreme Allied Commander
3890
Rep 54,576
Posts
Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com
|
That is correct. N55 is limited by the amount of air the N55 single turbo can move towards to top of the powerband.
|
Appreciate
0
|
11-06-2013, 12:18 PM | #8 | |
Banned
7909
Rep 11,785
Posts |
Quote:
When asked, in person, by yours truly, BMW M engineers stated that the N54 makes more power. Twin turbo > single turbo. Note when the N55 was instroduced. (end of 2011 for the 2012 model years) The N55 was designed as a world motor for FUEL ECONOMY to help with ( for example) CAFE averages is the US market. Even further development of the N55 in single turbo guise for the current crop of models shows it has gotten closer to the N54T but not exceeded it. The N54T which was used in the 1M, is *still* used in the 135is, 335is and the Z435is and the entire technology was purchased by ALPINA for further devlopment. http://www.f30post.com/forums/showthread.php?t=872279 http://www.e90post.com/forums/showthread.php?t=351798 Last edited by M3 Adjuster; 11-06-2013 at 12:55 PM.. |
|
Appreciate
0
|
11-06-2013, 12:24 PM | #9 |
Admiral of the Fleet
265
Rep 3,552
Posts |
|
Appreciate
0
|
11-06-2013, 12:51 PM | #10 | |
Banned
7909
Rep 11,785
Posts |
Quote:
http://www.bmwusa.com/Standard/Conte...and_Specs.aspx 3.0-liter BMW TwinPower Turbo inline 6-cylinder, 24-valve 320-horsepower engine; combines a twin-scroll turbocharger with variable valve control (Double-VANOS and Valvetronic) and high-precision direct injection |
|
Appreciate
0
|
11-06-2013, 12:57 PM | #11 |
New Member
0
Rep 10
Posts |
|
Appreciate
0
|
11-06-2013, 01:13 PM | #12 | |
Admiral of the Fleet
265
Rep 3,552
Posts |
Quote:
Trust me, there is no doubt the 135is has the N55. Aside from the press release, I previously had a 2008 N54 135i and the N54 looks very different (and much better I think) than the N55. Also, if you run a 135is vin through a vin decoder, it'll also show it's an N55. The 135is just takes a 135i with the m-sport package and they add the PPK2 and performance exhaust at the port essentially. So, mechanically it's just a normal 135i with a slight tune for an extra 20 horsies. |
|
Appreciate
0
|
11-06-2013, 01:13 PM | #13 | |
Would rather be driving.
12
Rep 175
Posts |
Quote:
|
|
Appreciate
0
|
11-06-2013, 03:21 PM | #15 |
Major
128
Rep 1,054
Posts |
Was unaware that the N55 was ~360HP limited? Depends how much $$ you invest in it. With a simple flash only that's probably accurate an number. There are 400hp N55's I've seen posting dyno charts on this forum.
From what I know.... The Dinan Stage 3 is good for 370HP + 400ft/lbs. I also know they're working on a larger compressor for the twin scroll turbo which according to them is good for 400HP. RB is almost finished with a turbo upgrade for the N55 similar to what they have made in the past for the N54. |
Appreciate
0
|
11-06-2013, 03:25 PM | #16 | |
Major
168
Rep 1,479
Posts
Drives: 2017 F80 M3
Join Date: Dec 2010
Location: Houston, TX
|
Quote:
__________________
_______________________
1991 E30 M3/Brilliantrot 2017 F80 M3/AW |
|
Appreciate
0
|
11-06-2013, 03:32 PM | #17 |
Major
128
Rep 1,054
Posts |
|
Appreciate
0
|
11-06-2013, 04:03 PM | #18 |
First Lieutenant
53
Rep 379
Posts |
I know this is a dumb question, but can anyone describe for me the 'twin-scroll' design? Is it a compound curvature of the turbine wheel? I've never really understood the term. Obviously the benefit of 'twin-scroll' is faster spool-up, but I have never actually understood exactly how.
__________________
Living the 1-life since 2013.
|
Appreciate
0
|
11-06-2013, 05:19 PM | #19 |
European Editor
10633
Rep 22,992
Posts |
^^Yes, that is correct. All 135iS were powered via the N55 motor. And IF I am not mistaken... BMW's last car to be powered by the N54 is the Z4 sDrive35is. All the other models have ended their production life(cycle).
__________________
|
Appreciate
0
|
11-06-2013, 06:01 PM | #20 |
Captain
192
Rep 893
Posts
Drives: 135is :) 192/586
Join Date: Mar 2011
Location: LA, CA
|
Doesn't the Z4 35i also carry the N54? I'm not sure now after the facelift but I doubt it'll change now.
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|