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Discussion Starter #1
Hey Guys,

When I was shopping for my car I drove 2 325i's and 2 328i's. Both the 328s were '99s and the
325s were 2001/2002. On both of the 325s the engine noise was much louder than in the 2.8l
Was this something that BMW "engineered" into the new 3-series to make it a little more sporty
or is the 325 just a louder engine. (I don't understand why they would be louder if everything
else is about the same. One 325 was sports and the other was not.
 
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the new 3's are much louder, and agressive sounding then the E36's......even the 325 sounds deep, the 330 sounds REALLY deep, both of our 330s vibrate a section of our house
 

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Discussion Starter #3
They were all E46s.. 328i apostrophe s =)

Is the Vanos system that much different between the 2.8, 2.5 and 3.0? Or is it more
of a shielding issue?
 
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Originally posted by nosuchsol@May 29 2003, 07:21 AM
They were all E46s.. 328i apostrophe s =)

Is the Vanos system that much different between the 2.8, 2.5 and 3.0? Or is it more
of a shielding issue?
o i thought you said 98....i believe bmw stepped up the exhausts on the 325/330 because i remember our 323 convertible, it was very subdued, but when i drove a 325, it was very nice and agressive....
 

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compared to my car, the 3 series is DEAD SILENT. i couldn't even hear it until it hit 4k rpm in each gear. that car was SLICK! the 330 was a little lower growl but still really quiet. with the radio on there was no engine noise. speedster, remember you have dinan mods to make the exhuast louder.
 

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Obviously the engines are supposed to sound different...

1998 (1998 for euro versions)-2000 323i's and 328i's use a m52 tu engine

For 2000 models on up 325's and 330's used the M54 Engine

M54 engine:

Purpose of the System
The M54 engine was development to meet the needs for ULEV compliancy for emission control. The increase in displacement allows the engine to kit the X5 All Roads vehicles while still meeting the demands for power and performance.

Introduction
The M54 - 6 cylinder engine is being introduced with the 2001 model year E53 - X5. The displacement of the new engine for the X5 is 3 liters and the engine will replace the 2.8 liter engine in the E46/E36-Z3 series in the 6/2000 and E39 series vehicles in 9/2000 production in the E46/E36 Z3 and E39 vehicles.

Although the E53 X5 with the M54 engine will be LEV compliant, the M54 - 3 liter displacement engine meets ULEV compliancy, for emission standards, for the balance of the product. The 2.5 liter version of the M54 engine will remain LEV compliant.

Design objective for the M54 engine were to provide

* Lower emissions
* Maintain Fuel Economy
* Maintain Power and Performance levels.



Specs on the M54-B30
231 bhp @ 5900rpms
300Nm @ 3500rpms (221ft.lbs)
Bore 84mm
Stroke 89.6mm
Compression 10.21


Specs on the M54-B25
192 bhp @ 6000rpms
245Nm @ 3500rpms (180ft.lbs)
Bore 84mm
Stroke 75mm
Compression 10.51


M54 Engine - Mechanical Changes

NEW PISTONS - The piston has a shorter skirt compared to the M52TU and continues with the graphite coating for friction and emission reducing measures. The piston rings have been modified to reduce friction.

CRANKSHAFT - The crankshaft for the 3 liter M54 is adopted from the S52-B32 - M3 engine. The crankshaft for the 2.5 liter is carried over from the M52.

CAMSHAFT - The camshaft for the 3 liter M54 is modified with more lift and new valve springs to accommodate the increased lift. The camshaft of the 2.5 liter M54 is carried over from the M52 engine.

INTAKE MANIFOLD - The intake manifold is modified with the shorter ram tubes (20mm shorter on 3 liter/10mm shorter on the 2/5 liter). The diameter of the tubes is increased slightly.

INJECTION VALVES - The diameter of the injection pintle has increased slightly for the increased displacement of the 3 liter engine. The injector for the 2.5 liter engine carries over from M52.

NON RETURN FUEL RAIL SYSTEM - The M54 engine MS 43.0 control uses the non return fuel rail system introduced on the M62TU engine. The system meets running loss compliance without the use of the 3/2 way solenoid valve currently used on the M52TU engine.

The regulated fuel supply is controlled by the fuel presure regulated integrated in the fuel filter. The fuel return line is also located on the filter.

The M54 engine uses an Electronic Controlled Throttle Valve (EDK) for intake air control. The idle control valve and turbulence function of the intake manifold carries over from the M52TU engine.

Dyno Charts:

 

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Discussion Starter #8
Well, they changed enough - now i wonder what's really making all that noise. =) I think the exhaust is a good culprit but I just felt it was more towards the front of the car and not the side/back. Interesting.
 

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There was a 330ci at the hotel the past couple of days, and one day when I was in the parking garage, the dude with the 330ci drove in. THAT THING SOUNDED SOOOO BAD ASS!!!! I was like. "Holy Crap!!!" I was pretty amazed.
 

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ive driven e46's...they sound soft and mushy compared to my car...mayb because my car is non vanos...and speedster if your cars exhaust can vibrate a section of your house then you've probably got a pretty weak house there :lol:
 
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Originally posted by Fruityone@May 30 2003, 05:44 AM
ive driven e46's...they sound soft and mushy compared to my car...mayb because my car is non vanos...and speedster if your cars exhaust can vibrate a section of your house then you've probably got a pretty weak house there :lol:
have you heard a 330 exhaust? especailly my moms (dinan)....the sound reveberates off the walls to the rooms above the garage
 

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My 325is sounds real deep, lot's of growling going on in the stock exhaust which I love.. B)
 

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yes i've driven 330's before definitely not louder than my car
 
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Originally posted by Fruityone@May 30 2003, 07:49 AM
yes i've driven 330's before definitely not louder than my car
stock vs stock...the 330 is louder of course
 
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