[AndoBowie]

Originally Posted by issabmw

As promised , this thread will be dedicated to the conversion of the three stage intake manifold from the e90 330i to the e90/92 328i and 325i. This has been proven to be the most power yielding modification for those who do not own 330s.

For the 325i stock form yields 215hp / 185 lb-ft tq
For the 328i stock form yields 220hp / 200 lb-ft tq

From what I could gather, this conversion paired with a tune would increase power to approximately ~265hp and ~225 lbft tq at the flywheel (stock 330i is 255hp/220tq) due to the benefits of the tune, minus the losses from a more restrictive exhaust system on the 25i/28i. Remember, 330i's have freer flowing catalytic converters.

This modification allows 325s to achieve at least ~40hp, and 328s to achieve at least ~35hpgains, rendering this upgrade the most cost effective for non-330 N52s.

I have seen more power yielded from this upgrade; it's dependent on the tune/tuning company you use.


Here are the parts with part numbers of what is needed (credits to e90pilot):

11617559523 Intake Manifold
11617559530 Vent Hose
11617579114 Adjustor Unit
11617560538 Adjustor Unit 2
11617547242 Gasket set
11617535850 x2 Screw 50x35
11617535849 x5 Screw 50x20
11617535851 x1 Screw 50x66

You can purchase them from these retailers:
http://www.realoem.com/
http://www.getbmwparts.com/
http://www.generalautorecycling.com/


**As far as warranty goes, the setup looks stock, sans the extra wires connected to the DISA valves, but the tune may be detectable. For this reason, I don't endorse completing this mod under warranty. Almost all 325's are out of warranty at this point, though, with 328's following suit.**



Pricing for new parts (as of 2010):

11617559523 $483.30 Fuel system - Fuel induction - Intake - Intake manifold Intake manifold, 330i, 330xi 2006

11617559530 $72.25 VENT HOSE

11617579114 $179.08 ADJUSTER UNIT

11617560538 $179.08 ADJUSTER UNIT

11617547242 $34.64 Fuel system - Fuel induction - Intake - Intake manifold gasket Intake manifold, 3 series, w/o diesel 2006 - 2009

11617535850 $0.62 SCREW (x2)

11617535849 $0.62 BOLT (x5)

11617535851 $0.62 SCREW (x1)

This equals a total of $953.31 through http://www.getbmwparts.com/ which is powered by Tischer BMW.

Thanks to mjfloyd1 for finding this:

http://www.bmwmercedesparts.com
BMW in Lincoln, Nebraska.

Parts are priced lower and offer free shipping on orders greater than $200


DIY
http://www.pelicanparts.com/BMW/tech...eplacement.htm

Tuning Options:

Active Autowerke
http://store.activeautowerke.com/act...ware-p149.aspx

Eurocharged
http://www.eurocharged.com/products/...oftware-detail

Turner Motorsport (offers a complete package w/ manifold)
http://www.turnermotorsport.com/p-17...28i528iz4.aspx

i know im 14 years too late to this thread but if you are still active do you know if an oem intake manifold from a 330i would be carb compliant when installed on a 328i. I'm assuming it should be since it is also an n52 but just want to confirm.

[jellevolkerink]

Originally Posted by david in germany

I hate to be late to the party but I just grabbed a 3 stage intake and bimmerlabs website seems to be down for the count. Anywhere else to get the download for the tune?

Site is not down mate just one of the certificates expired. You can access the site on google chrome by going to bimmerlabs.com and then when you get a notification that it is unsafe : type on your keyboard "thisisunsafe" and you will be able to access the site.