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12-18-2009, 09:37 AM | #1 |
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128i RealOEM Engine Choices
Hey there guys,
I searched it briefly on the forums, but couldn't find information about this. When I select my car at realoem website, there are 2 engine choices.. N51: 01/2009 E82 128i Coupe N51 USA Left hand drive Production Code: UP93 N52N: 01/2009 E82 128i Coupe N52N USA Left hand drive Production Code: UP73 What is the reason for this? What are the differences, anyone have any insight on this? Thanks. Edit: Well Looks like N51 is SULEV engine, compared to N52.. So question is, which one performs better?
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Last edited by Evice; 12-18-2009 at 09:45 AM.. Reason: Extra Info. |
12-18-2009, 10:31 AM | #2 |
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+1 on what's that
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12-18-2009, 10:48 AM | #3 |
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12-18-2009, 12:21 PM | #4 |
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Drives: M-Sport 128i, 328xi, 3.0CS
Join Date: Jun 2008
Location: New England, USA
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SULEV is for California, New York, Maine, Massachusetts, Vermont, Connecticut, Rhode Island, Oregon, and Washington.
My '09 128i is a SULEV with the N51 engine. The SULEV emissions measures include: • Secondary Air System with mini-HFM • Radiator with “Prem-air” coating • Lower compression ratio (10:1) via modified combustion chamber and pistons • Underbody catalyst in addition to “near engine” catalyst • Activated carbon air filter in air filter housing • Plastic valve cover with integrated crankcase vent valve and separator (from N52KP) • Steel fuel lines with threaded fittings and sealed fuel tank • Crankcase ventilation system integrated into cylinder head cover • Purge system piping made from optimized plastic
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'09 128i - Black Sapphire Metallic\Coral Red\Glacier Silver\N51 DISA\6MT\Navigation\Premium\M-Sport\Heated seats\Xenon\Headlights\iPod\Smartphone\Euro Delivery
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12-18-2009, 06:57 PM | #5 |
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so performance wise is there any difference between N51 and 52?
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12-18-2009, 08:00 PM | #6 |
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"Steel fuel lines with threaded fittings and sealed fuel tank" this is a very interesting difference... as it is really not an engine change...
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12-19-2009, 08:39 AM | #7 |
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Drives: M-Sport 128i, 328xi, 3.0CS
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There is a sticker near the radiator that says that it must be replaced with one with the Prem-air coating. The coating turns ozone into oxygen.
There is a BASF paper here that describes it.
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'09 128i - Black Sapphire Metallic\Coral Red\Glacier Silver\N51 DISA\6MT\Navigation\Premium\M-Sport\Heated seats\Xenon\Headlights\iPod\Smartphone\Euro Delivery
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12-19-2009, 08:41 AM | #8 |
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It has the same 230 HP rating, but I am not convinced because of this difference: "Lower compression ratio (10:1) via modified combustion chamber and pistons".
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12-22-2009, 12:30 AM | #9 |
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I'm in California and I have the N52 engine. My VIN has the UP73 in it.
I also tried this website. I don't know how accurate it is though. http://www.bmw-z1.com/VIN/VINdecode-e.cgi |
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12-22-2009, 08:45 AM | #10 |
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well this is getting interesting.. CA driver with n52.. Did you buy it new or used ?
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12-22-2009, 09:12 AM | #11 |
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the car may have been diverted from a dealer in a non SULV state to his CA dealer...
I would not prefer a SULEV car given the extra/different emission parts used. I recall reading Mike Miller indicating that the SULEV e46s were more problematic. Last edited by cimbali; 12-22-2009 at 10:42 AM.. |
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12-22-2009, 10:10 AM | #12 |
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It was new, I ordered it.
This is from a couple of years ago, but it discusses the different engines. Looks like there are 2 different types of N52 engines. http://www.e90post.com/forums/showthread.php?t=52608 |
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12-22-2009, 12:05 PM | #13 | |
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Quote:
There can't be much difference. I'm sure it takes a dyno to tell the engines apart.
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12-22-2009, 04:23 PM | #14 | |
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Quote:
negligable. |
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05-12-2010, 08:20 PM | #15 |
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The N51 has the 3 stage intake manifold to compensate for that. So who knows, it may even put out slightly more than the N52... only BMW can tell.
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