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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Three-Stage Intake Manifold N52B25 - 323i



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      11-18-2011, 05:56 AM   #67
DimSum
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Great pictures Hedges! Glad you liked the third stage manifold!
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      03-06-2012, 03:57 PM   #68
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Do you know where I can get O2 sims for N52 engine?
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      08-20-2013, 12:22 PM   #69
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any 02 sims for n52?
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      08-20-2013, 05:42 PM   #70
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Quote:
Originally Posted by Ermis View Post
any 02 sims for n52?
Active Autowerke - Turns the code off (via tuning)
Evolve Tuning - Lowers the sensitivity to not throw a code (via tuning)
BMS Downpipe Fix for N54 - Require configuration but a few have got it to work

There are mechanical means as well that others have used. Not much info on that. With the vishnu flashing tablet they are about to release you will also be able to tune and remove the codes via that tool.
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      08-21-2013, 05:01 PM   #71
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Quote:
Originally Posted by DimSum View Post
Like I mentioned before for people who didn't believe me, the 323i comes factory with the DISA Actuator.

The Canadian 323i is acutally an Euro 325i with a Three-Stage Intake Manifold.

A simple ECU reflash will get you up to the European Spec 325i performance range.

323i CA 2007+ 2.5 L I6 200 bhp (149 kW; 203 PS) 180 lbft (244 Nm)
325i EUR 20052007 2.5 L I6 218 PS (160 kW; 215 bhp) 250 Nm (184 lbft)

I spoke with a tuning company, and they said that on the Euro 325i they were able to produce figures around 233hp and 206 lb/ft.

On top of that, primary cat removal and retaining the OEM exhaust shows a 15whp gain on top of everything, which is not bad for a engine which is a high-reving 2.5L straight-6.

Im glad to see your post cuz i almost did my conversion, mine is canadian 09 323i so they are 3 stage intake manfold right?
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      01-14-2015, 03:50 PM   #72
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Quote:
Originally Posted by DimSum View Post
Like I mentioned before for people who didn't believe me, the 323i comes factory with the DISA Actuator.

The Canadian 323i is acutally an Euro 325i with a Three-Stage Intake Manifold.

A simple ECU reflash will get you up to the European Spec 325i performance range.

323i CA 2007+ 2.5 L I6 200 bhp (149 kW; 203 PS) 180 lbft (244 Nm)
325i EUR 20052007 2.5 L I6 218 PS (160 kW; 215 bhp) 250 Nm (184 lbft)

I spoke with a tuning company, and they said that on the Euro 325i they were able to produce figures around 233hp and 206 lb/ft.

On top of that, primary cat removal and retaining the OEM exhaust shows a 15whp gain on top of everything, which is not bad for a engine which is a high-reving 2.5L straight-6.

Sorry to resurrect an old thread... If you get the EU spec ECU Flash, do you need to run 94(93) octane fuel?

Is there someone in the GTA who can do this?
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      01-14-2015, 10:48 PM   #73
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Quote:
Originally Posted by roast_ View Post
Sorry to resurrect an old thread... If you get the EU spec ECU Flash, do you need to run 94(93) octane fuel?

Is there someone in the GTA who can do this?
Octane 91 shoudl be fine- i prefer Shell 91 on my tuned car. Then Esso 93

Dimsum is gta - my little bimmer website
AA or Eurcharged tune will do good too
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      01-18-2015, 03:07 AM   #74
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Are there any gains to be had from secondary cat removal?
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      01-20-2015, 05:08 PM   #75
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Quote:
Originally Posted by Broken_Gearbox View Post
Are there any gains to be had from secondary cat removal?
Yes, somewhere ~3-5hp.
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      06-04-2015, 03:58 PM   #76
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How much did it cost you? I might try it out. Btw was it on a 07 or higher ?
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      06-14-2015, 08:50 PM   #77
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are there any types of cold air intake that could boost hp on my 2009 323i or is it a waste of time getting one?
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      06-14-2015, 09:18 PM   #78
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Originally Posted by Bhallz323i View Post
are there any types of cold air intake that could boost hp on my 2009 323i or is it a waste of time getting one?
spend your money elsewhere..like a tune
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      06-14-2015, 09:38 PM   #79
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Intake upgrade on the N52 is good because the induction noise has so much win!

I have the BMW performance intake on my 325i. My passengers often compliment how good it sounds.
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      06-14-2015, 10:12 PM   #80
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Intake: power gains minimal, but audible gains make it worth while
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      09-21-2015, 03:31 PM   #81
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Hi guys!
I'm interested in the Stage 3 upgrade... I contacted via mail ActiveAutowerke with below message:

"I bought the car from another person I dunno if they had upgraded parts / software (doubt it). Correct me if I'm wrong but I believe I have stage 3 intake as it has 2 pipes below and not just 1 as I've seen online.
I tried looking for the part number but wasn't able to find it (I'm attaching a picture of the intake for your reference and the only tag I found on the part)"

After more research I found out that my car has the N52B25 engine (2.5 litre European version) not the N52B30 (3.0 litre US version)

And they replied: " the 3 stage manifold may not work good on the 2.5L engine, it may lose low end and mid range power...best to probably use the original intake manifold and maximize the tune.. That is my advise on this.
Since we dont have this 2.5L engine here we never been able to test the bigger intake manifold.......if you already have the bigger manifold installed and can switch back and forth I could send you 2 files to try
"

I'm attaching my manifold pic... perhaps someone here can clear this up for me (if I have stage 1 or 3? and if its possible to install the stage 3 in the 2.5 engine)
Name:  pic 1.jpg
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Size:  391.9 KB

Name:  pic 2.jpg
Views: 284
Size:  262.1 KB
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      09-21-2015, 06:22 PM   #82
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That is clearly a DISA valve. Pic of the TB area please.
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      09-21-2015, 07:37 PM   #83
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Should've taken the picture prior to reinstall.... hope this one works...Name:  20150921_182911_resized_1.jpg
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      09-25-2015, 11:27 AM   #84
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Any update? Did the pic work?
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      09-25-2015, 01:47 PM   #85
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Quote:
Originally Posted by roast_ View Post
Sorry to resurrect an old thread... If you get the EU spec ECU Flash, do you need to run 94(93) octane fuel?

Is there someone in the GTA who can do this?
all the EU tunes I have looked at actually have the same ignition maps. In fact it appears as if all N52s use the same basic ignition values with only small changes to the part throttle curves.
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      03-10-2016, 03:15 AM   #86
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Holy thread revival batman... okay now that is out of the way...

There is one more difference and I don't know how big of a difference it is...

N52B25 (218ps) Intake Manifold Part no. 11617559525
N52B30 (The 3.0 port injector version not the direct injection one), Manifold part no. 11617559523

So what gives? Are the gains (or lack of) down to that 0.5 difference in engine displacement?
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      03-10-2016, 11:31 AM   #87
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it's half a liter. That's a big difference.
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