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BMW 3-Series (E90 E92) Forum
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Three Stage Intake Manifold Conversion for 328/325
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04-30-2010, 11:39 PM | #1 |
cool beans
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Three Stage Intake Manifold Conversion for 328/325
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 Last edited by issabmw; 04-08-2014 at 01:35 PM.. |
04-30-2010, 11:56 PM | #2 |
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05-01-2010, 12:58 AM | #3 |
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hasn't e90pilot done this already?
http://www.e90post.com/forums/showthread.php?t=372973 dont' get me wrong would like to see a DIY of this. keep us posted.
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05-01-2010, 08:59 AM | #4 | |
cool beans
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Quote:
I promised many on that thread that I would conduct a clear and concise write-up involving all neccessary procedures, risks, installations, and finally results. Basically a master thread on this information. |
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05-01-2010, 10:49 AM | #6 |
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I hope to run into one of these modded 325/328is sometime, although I doubt it will happen in the KC area. Look forward to seeing you guys get the power increases you deserve!
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05-01-2010, 11:09 AM | #7 |
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this is great, having seen or heard of something here in texas! I'm gna have to invest into this and get it done soon. Please post if any other ingo needed to get this done!!!
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05-01-2010, 11:50 AM | #8 |
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05-01-2010, 11:59 AM | #9 | |
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Nothing would put a smile more than the 325 keeping up with, if not beating the 330. If this does work, which am almost positive it will, it would render my higher mileage 330xi obsolete, which then i will be able to sell and use the funds to buy a very tempting 335i. That said, I plan on continuing with my mission to create the quickest 325 and to help others with theirs. |
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05-01-2010, 12:08 PM | #10 | |
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Another option is picking up a used one for less. |
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05-01-2010, 12:21 PM | #11 | |
cool beans
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Will add this to the post, this can really save us a good hundred or so. |
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05-01-2010, 02:26 PM | #14 |
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05-01-2010, 10:11 PM | #16 |
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Great question, this will clarify. The 325 because...
1. the 128 is still under warranty 2. the 128i has enough power in my opinion 3. the 325 is severely underpowered, also in my opinion 4. the 330xi is most likely going to be replaced with a 335 soon and im keeping one naturally aspirated 3 series project car next to the turbo 3er I will probably do this to the 128 later down the line, but the DIY and writeup going to be using the 325 |
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05-01-2010, 11:09 PM | #18 |
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But wait.. how much of the power difference between the 328i and the 330i is due to DI and compression differences, if any?
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05-01-2010, 11:40 PM | #19 |
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05-02-2010, 10:21 AM | #22 |
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Upon further review, you're right.. I can't wait to see a diy and some dyno sheets!
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