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BMW 3-Series 2005 and earlier
30250 messages, Last post on Mar 24, 2013 at 11:51 AM
You are in the BMW 3-Series Forum.- Your Hosts are Kirstie@Edmunds & Karen@Edmunds
What is this discussion about? BMW 3 Series, Sedan
#21985 of 30250 fjk57702 by shipo
Feb 20, 2003 (8:07 pm)
I am reasonably certain that the 1999 and 2000 323i engines DID in fact have the Double VANOS system. FWIW, I did a little checking, and the results, 100% agreement, Double VANOS for 1999 for both the 2.5 Liter I6 (which was in the 323i and the Z3 2.3) and the 2.8 Liter I6.Links supplied:
http://www.theautochannel.com/content/vehicles/new/reviews/1999/l- hill_bmw_z3.html
http://www.epinions.com/auto-review-5557-754300C-38692122-prod1
http://www.bentleypublishers.com/product.htm?code=b301&subjec- t=4
I could go on, but you get the point.
Best Regards,
Shipo
#21986 of 30250 by locke2c
Feb 20, 2003 (8:38 pm)
that's a 99-00 though. I don't believe the 2.5L in the E36 was double VANOS at any point. It was lucky to have VANOS!my '95 M3 is only VANOS. '96 got 3.2L and double VANOS...
-Colin
#21987 of 30250 Colin by shipo
Feb 20, 2003 (8:51 pm)
I think that this discussion has been about 1999 and later models. I just wanted to make sure that the individual who posted above was not mislead regarding the content of the E46 models. Best Regards,
Shipo
#21988 of 30250 by locke2c
Feb 20, 2003 (8:57 pm)
it might have shifted that way due to what most respondants own, but I'm sure the original poster on this subject was asking about 97-up and initially focused on the M3.
-Colin
#21990 of 30250 by fjk57702
Feb 21, 2003 (7:21 am)
The basic difference between the 323 and the 325 is 14 horsepower, whatever the technical differences actually are.#21991 of 30250 HP Differences: See December 2000 Car & Driver by riez
Feb 21, 2003 (8:04 am)
Check out the December 2000 Car & Driver, their test of new 330i. Excerpt:"BMW says the added cubes only account for about 30 percent of the power spike over the 2.8-liter engine, which made 193 hp and 206 pound-feet, compared with the 330i's 225 hp and 214 pound-feet. ANOTHER 57 PERCENT COMES FROM FIDDLING WITH THE PROFILES OF THE TWIN-CHAMBER INTAKE-MANIFOLD AND EXHAUST PORTS, AND THE REST COMES FROM CHANGES IN THE CAM PROFILES. Happiness through better breathing, in other words. THANKS TO THE INTAKE FINAGLES SHARED WITH THE 3.0-LITER, THE BASE 2.5-LITER SIX ALSO GETS A 14-HP JOLT TO 184 HP."
Article also has a nice discussion about the changes to the M54 engine over time, including VANOS/double VANOS.
The MY 2000 full-color brochure for the 3 Series sedan says "Double VANOS steplessly variable valve timing" is standard with BOTH 323i (170 hp at 5500 RPMs and 181 pound-feet at 3500 RPMs) and 328i (193 hp at 5500 RPMs and 206 pound-feet at 3500 RPMs). And in the Technical Guide section of the brochure, it has a section devoted to explaining double VANOS.
The MY 2001 full-color brochure then shows output as 184 hp (6000 RPMs) and 175 pound-feet (3500 RPMs) for 2.5L and 225 hp (5900 RPMs) and 214 pound-feet (3500 RPMs) for 3.0L.
You have to keep in mind that the later 2.5L engine actually lost 6-pound-feet of torque from 2000 to 2001 and today. And notice how the higher hp figures come at higher RPMs compared to MY 2000.
#21992 of 30250 Hair splitting time... by shipo
Feb 21, 2003 (8:09 am)
The 1999 and 2000 323i have the following ratings:HP: 170
5500 RPMs TQ: 181
3500 RPMs WT: 3153 Lbs
The 2001 and on 325i have the following ratings:
HP: 184
6000 RPMs TQ: 175
3500 RPMs WT: 3241 Lbs
In theory, the 323i should actually be a little faster off the line, and the 325i should be a little faster at higher speeds. If I remember correctly, Brave1Heart posted something a year ago or so that supported this theory, however, I cannot remember the specifics of his post.
Best Regards,
Shipo
#21993 of 30250 Riez by shipo
Feb 21, 2003 (8:12 am)
I see that great minds think along similar patterns, again. You and I must have been working on the two above posts at the same time. Best Regards,
Shipo
#21994 of 30250 323 & 325 (e46) by jb_shin
Feb 21, 2003 (8:17 am)
Interesting torque rating for both engines:323: 181
3500 325: 175
3500 and both engines have the same bore/stroke, compression ratio, and displacement. The only difference is the engine management system. The new system actually makes less torque, although it makes more bhp.
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