|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
6 cylinder engines
|
|
10-01-2005, 04:58 PM | #1 |
Fleet Owner
3
Rep 73
Posts |
6 cylinder engines
Can anyone tell me whether the 325 shares the same lightweight (magnesium parts etc) construction as the 330? BMW makes great play of the lightweight 330 with its high-revving capabilities, but says little about the 325.
__________________
Arctic 320i Steptronic I-drive and all extras including chrome window/grille mouldings.
|
10-01-2005, 05:17 PM | #2 |
Brigadier General
101
Rep 3,566
Posts
Drives: F30 M-Sport 328i Estoril Blue
Join Date: Jun 2005
Location: Melbourne Australia
|
as far as i am aware and have been told, yes, the 2.5 litre 325 is the same with a smaller capacity.
now the 325 cars destined for the USA, are in fact the very 3 litre engine bmw advertise with what you mention. it is a detuned 330. hope this helps you.
__________________
328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect, MST turbo intake pipe, MST Cold Air Intake, JB4 on Map 2 with Catless DP produces awesome performance in Sport.
|
Appreciate
0
|
10-01-2005, 05:22 PM | #3 |
Brigadier General
101
Rep 3,566
Posts
Drives: F30 M-Sport 328i Estoril Blue
Join Date: Jun 2005
Location: Melbourne Australia
|
sorry sysop,
my car has the 7000rpm limit as well and i can tell you that it truly begs to be revved but has such strong torque low down (my old bmws never had adequate low down torque) that i find building up speed easy even in a high gear. now if i really want to zoom......the 325 can really zoom, no problem. the 330 is just a little bit quicker.
__________________
328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect, MST turbo intake pipe, MST Cold Air Intake, JB4 on Map 2 with Catless DP produces awesome performance in Sport.
|
Appreciate
0
|
10-02-2005, 01:12 AM | #5 |
First Lieutenant
44
Rep 354
Posts |
hey david you should try a e30 325e or no letter they have a 2.8 letter and about 165tq but only 127hp, my 325 no letter can almost beat any thing off the line but speed wise its slow going to 60 but shines after 80!!
|
Appreciate
0
|
10-02-2005, 02:31 AM | #6 | |
Brigadier General
101
Rep 3,566
Posts
Drives: F30 M-Sport 328i Estoril Blue
Join Date: Jun 2005
Location: Melbourne Australia
|
Quote:
__________________
328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect, MST turbo intake pipe, MST Cold Air Intake, JB4 on Map 2 with Catless DP produces awesome performance in Sport.
|
|
Appreciate
0
|
10-02-2005, 09:52 AM | #9 |
E90 325i
0
Rep 35
Posts |
From my research, I've concluded there are two primary differences between the U.S.-spec. 325i and 330i N52 engines: 1.) the camshaft profiles (the lift, duration and overlap all appear to be "slightly greater" for the 330i), and 2.) the intake manifolds (single-stage for the 325i, vs. a more advanced three-stage design for the 330i).
Both engines do utilize the same lightweight "special" metals and very complex production process. I don't believe the exhaust system is significantly different between the two cars ... and, I do believe the cylinder head valves are probably the exact same size for both engines (I base this on the fact that the perf.-difference between the two is not significant, and could easily be accomplished with slight changes to the cam, intake and exhaust systems). And I personally wouldn't label the 325i N52 as "de-tuned" ... IMO, it's simply less optimized for "higher-RPM" performance than the 330i N52. And specifically, the higher valve-duration of the 330i N52 camshaft is what contributes most to the increased low-end torque ... the higher valve-lift & overlap is what contributes most to the higher-end HP boost ... I say the three-stage manifold is more advanced because it allows air & fuel to be funneled into either low-range, mid-range or high-range "sections" of the manifold, each of which is optimized for a particular RPM range. Anyway, this is just my opinion.
__________________
E90 325i / TiAg / Black Leather / Burl Walnut / 6-Speed Manual / Sport Package
|
Appreciate
0
|
10-02-2005, 10:47 AM | #10 | |
Lieutenant General
1312
Rep 10,185
Posts |
Quote:
The USA 325i and 330i is the exact same engine from top to bottom ( excluding intake path ) |
|
Appreciate
0
|
10-02-2005, 11:50 AM | #11 |
E90 325i
0
Rep 35
Posts |
Yes, the cam-"profile" is controlled electronically ... thats what I was referring to ... and, I stand by my statement that the 325i-version has a Single-Stage Intake Manifold (vs. the three-stage in the 330i-version).
Also, for all, here is one of the better articles on the production process of the N52 engine ... go to the paragraph that beings with: "Start with the engine ...": http://www.autoweek.com/article.cms?articleId=101850
__________________
E90 325i / TiAg / Black Leather / Burl Walnut / 6-Speed Manual / Sport Package
|
Appreciate
0
|
10-02-2005, 01:09 PM | #12 | |
Lieutenant General
1312
Rep 10,185
Posts |
Quote:
|
|
Appreciate
0
|
10-02-2005, 01:16 PM | #13 | |
Second Lieutenant
10
Rep 275
Posts |
Quote:
|
|
Appreciate
0
|
10-02-2005, 01:23 PM | #14 | |
Lieutenant General
1312
Rep 10,185
Posts |
Quote:
|
|
Appreciate
0
|
10-02-2005, 01:49 PM | #15 |
E90 325i
0
Rep 35
Posts |
oops, my mistake ... I was rushed posting my response while concurrently working on my picks before the NFL games start here in the States.
__________________
E90 325i / TiAg / Black Leather / Burl Walnut / 6-Speed Manual / Sport Package
|
Appreciate
0
|
Bookmarks |
|
|