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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > N20 Engine Full Technical Info and Service Information Manual
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      06-23-2013, 10:04 AM   #1
Jason
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Post N20 Engine Full Technical Info and Service Information Manual

Download the full N20 engine tech and service guide below.

The N55 engine tech and service guide can be found at: http://www.f30post.com/forums/showthread.php?t=854477
The S63Tu (M5/M6) engine tech and service guide can be found at: http://f10.m5post.com/forums/showthread.php?t=803494



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      06-23-2013, 12:18 PM   #2
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i think theres some problem with the n20 link its an endless loop
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      06-23-2013, 12:35 PM   #3
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that's what's most motors are
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      06-23-2013, 01:14 PM   #4
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Ohhh Gawd, The force is strong with this one~
We're going to be seeing a 4 Banger with 400HP+, 100HP per cylinder in the near future!
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      06-23-2013, 01:21 PM   #5
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Well, the Honda/Acura, Subaru, Toyota aftermarket community have been making 500hp 4 bangers for decades. With FI the possibilities are endless.
Of course what a fully built N20 has to offer is yet to be seen it may or may not disappoint tuners

Last edited by topcat87; 06-23-2013 at 01:42 PM..
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      06-23-2013, 01:24 PM   #6
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this is a great engine indeed!
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      06-23-2013, 02:16 PM   #7
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A true engineering masterpiece.

After owning a Subaru WRX for 6 years and 140,000 miles, I swore I would never own another turbo car- not that I had problems with it, as a matter of fact it was a fun car with tons of utility from daily duty, to autocross and getting groceries- yes a wagon. With a big catted downpipe and cobb stage 2 the car ripped... but I hated the throttle modulation- the lag both stepping on and letting off the gas.

I finally sampled a 328i.... throttle response is 90% that of my n52, and a ton more torque. Smooth too, for a 4 cyl which is inherently unbalanced. Just a great motor.

It will be neat to see if they finally figured out how to get past the issues related to direct injection and carbon build up.

Even neater would be if an M version of this motor finds its way into the M2... same as the days of the e30 with a 2.5 6 in the 325i and of course the 4 cyl in the M3.
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      06-23-2013, 02:19 PM   #8
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Also- is the water pump really mounted that far out from the motor- if so that's a great upgrade to make that part easier to replace.
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      06-23-2013, 02:52 PM   #9
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IF they just made good water pumps in the first place nobody including you and I will give a rip.

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Also- is the water pump really mounted that far out from the motor- if so that's a great upgrade to make that part easier to replace.
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      06-23-2013, 03:17 PM   #10
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I love N20, defiantly one of the best 4-cyl. ever made. Great info!
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      06-23-2013, 08:00 PM   #11
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It's too bad that it does not have a great sound track. I think BMW needs to work on the acoustics seriously for this engine. It sounds a bit coarse and unrefined compared to the BMW inline-6's of BMW.


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this is a great engine indeed!
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      06-23-2013, 08:41 PM   #12
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I think that is a gem of a motor. When the M2 comes out, and this 4 banger gets something like 2 bar of boost, it will be a little beast.
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      06-23-2013, 10:25 PM   #13
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any comparison with the 2.0T from the VAG family?
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      06-23-2013, 11:54 PM   #14
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Quote:
Originally Posted by LateralG
any comparison with the 2.0T from the VAG family?
That motor is great when it makes over 250 hp.
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      06-24-2013, 05:00 AM   #15
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November 2011 post on Kellener tuning:

http://www.f30post.com/forums/showthread.php?t=611684

AC Schnitzer too..and probably others by now.
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      06-24-2013, 08:39 AM   #16
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Quote:
Originally Posted by LateralG View Post
any comparison with the 2.0T from the VAG family?
http://www.e90post.com/forums/showthread.php?t=480204
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      06-28-2013, 03:25 PM   #17
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so what is the real, mechanical, difference between teh 320i and 328i engines?

is the 320i just a detuned car? My thought is, same engine, same turbo... BMS will come out with 1 tune that will take both the 320i and the 328i to the exact same level, while buying a 320i would save $5k +

What am I missing here? As usual, the dealership is woefully lacking in knowledge of this subject.
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      06-29-2013, 09:39 AM   #18
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Quote:
Originally Posted by CWysong View Post
so what is the real, mechanical, difference between teh 320i and 328i engines?

is the 320i just a detuned car? My thought is, same engine, same turbo... BMS will come out with 1 tune that will take both the 320i and the 328i to the exact same level, while buying a 320i would save $5k +

What am I missing here? As usual, the dealership is woefully lacking in knowledge of this subject.
BMS did already: 266 RWHP using their Stage 2 tune with the 320i - http://www.n54tech.com/forums/showthread.php?t=15536
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      06-29-2013, 10:46 AM   #19
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The next question would then seem to be does the rest of the drivetrain have the 328i stoutness or are we at risk of breaking something between the flywheel and the tires?
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      07-02-2013, 05:29 AM   #20
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thx!
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      10-10-2013, 05:11 AM   #21
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Anyone have a link to the training guide for the N47 in the 328d?
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      09-04-2015, 06:34 AM   #22
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Quote:
Originally Posted by Jason View Post
Download the full N20 engine tech and service guide below.

The N55 engine tech and service guide can be found at: http://www.f30post.com/forums/showthread.php?t=854477
The S63Tu (M5/M6) engine tech and service guide can be found at: http://f10.m5post.com/forums/showthread.php?t=803494



Is there a Technical Training and Product information for the N26 engines?
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