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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, 04:56 AM   #67
DimSum
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Great pictures Hedges! Glad you liked the third stage manifold!
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      03-06-2012, 02:57 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, 11:22 AM   #69
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any 02 sims for n52?
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      08-20-2013, 04:42 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, 04:01 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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