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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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      09-15-2015, 04:24 PM   #23
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Quote:
Originally Posted by BXL4 View Post
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?
I'm also interested in knowing this! I'm trying to decide if i should change the software of my f22 220i so that i could get 270 hp.
Also is there any mechanical differences between the 20i and the 28i versions of the engine?
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      09-21-2015, 10:27 PM   #24
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Quote:
Originally Posted by Ove View Post
I'm also interested in knowing this! I'm trying to decide if i should change the software of my f22 220i so that i could get 270 hp.
Also is there any mechanical differences between the 20i and the 28i versions of the engine?
270 is not a problem. With the right fuel it's capable of easily reaching 330/350 hp. Sometimes even more. But at that power level, reliability may be a concern, specially considering the 20is run way leaner than the 28is. Also, on the 20is ignition advance curve is steeper. +15 degrees is common.

No differences besides compression ratio depending on the country the car is sold.
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      09-22-2015, 03:04 PM   #25
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Originally Posted by marcoac14 View Post
270 is not a problem. With the right fuel it's capable of easily reaching 330/350 hp. Sometimes even more. But at that power level, reliability may be a concern, specially considering the 20is run way leaner than the 28is. Also, on the 20is ignition advance curve is steeper. +15 degrees is common.

No differences besides compression ratio depending on the country the car is sold.
Thanks buddy, good to know!
Seems like i'll be getting the software upgrade in not to long then
Do you have a tune on your 320i?
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      09-22-2015, 09:08 PM   #26
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Originally Posted by Ove View Post
Thanks buddy, good to know!
Seems like i'll be getting the software upgrade in not to long then
Do you have a tune on your 320i?
No problem. I have JB4 + Flexfuel wires + EWG harness and a decat downpipe on my car.
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      11-18-2015, 06:24 AM   #27
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Dear all,


I'm actually doing a master in Automotive Engineering and I've a project about this engine (N20B20) in a 328i.

I'm working on the oil system, which is really interesting with its variable geometry oil pump.

Does anyone has more information about the oil system on this engine ? (Brand of the oil pump, flowrate, pressure, ...)

I've already checked the service information manual, but some informations are missing.

Also, if you have a CAD model of this engine (or just some oil system parts), let me know.


Thanking you in advance for you help.

Last edited by G-med911; 11-18-2015 at 06:25 AM.. Reason: Mistake
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      12-29-2015, 02:27 PM   #28
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Nice! Thanks!
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      02-15-2016, 01:03 PM   #29
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awesome read! thanks
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      09-13-2016, 07:59 AM   #30
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I found some decent information on the difference of the N26 compared to the N20 engine, being that more and more engines are now going the the N26 setup for emissions.
I know there is a lot of talk about the N26 HC air filter, and catalytic convertors.
Attached Images
File Type: pdf -N26-Engine.pdf (1.57 MB, 2733 views)
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      03-14-2018, 03:07 PM   #31
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Originally Posted by topcat87 View Post
i think theres some problem with the n20 link its an endless loop
Click the picture of the engine, and it opens the link to the N20.
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      04-17-2018, 08:11 AM   #32
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n20

Thanks Jason for the link on the N20 information. I am a former Mercedes Benz Tech . I have worked on some BMW but what I have just experience with a 2013 X3 with this N20 with the timing chain is just as bad as the Mercedes 272 engine failure. The top guide breaks and breaks a piece of the cylinder head off where it is attached and the same at the bottom and damages the block. I swapped out the Engine myself now I got to read this manual and figure out why I get crank and no start:
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      04-17-2018, 10:16 AM   #33
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Quote:
Originally Posted by leadmbtech View Post
Thanks Jason for the link on the N20 information. I am a former Mercedes Benz Tech . I have worked on some BMW but what I have just experience with a 2013 X3 with this N20 with the timing chain is just as bad as the Mercedes 272 engine failure. The top guide breaks and breaks a piece of the cylinder head off where it is attached and the same at the bottom and damages the block. I swapped out the Engine myself now I got to read this manual and figure out why I get crank and no start:
Oh man... That is not going to be fun lol... Anything to do with CAS/EWS?
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      01-31-2019, 02:16 PM   #34
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Great, thank you for this publication. This will be something which will take my attention for a next few nights. On Saturday I will bring 328i F31 and I am little bit nervous, what I will do when some possible problem will show up with this car. Of course I am not expecting nothing, but I saw few posts and discussions here and I am little bit scared.
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      02-07-2019, 01:30 PM   #35
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Bmw F30 320d Aircon Pump

Good day ! i wanted to ask how can i replace my aircon pump pulley ,it was damaged ,i can see it has nut to be replaced ,please help.
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      08-11-2019, 06:42 AM   #36
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Newbie here and I am looking for some help on my car. I have an F30 320i xDrive. I am looking for the manuals. Timing chain issues are scaring my.
Thanks
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      09-06-2019, 01:53 PM   #37
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Quote:
Originally Posted by topcat87 View Post
Well, the Honda/Acura, Tutuapp 9Apps ShowBox 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
i think theres some problem with the n20 link its an endless loop

Last edited by MAILIYAT; 09-06-2019 at 02:48 PM..
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      12-01-2019, 05:07 AM   #38
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Nice! Thanks very much
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