M Series Engine Spec

Discussion in 'Engine Tech' started by kevster30, Nov 29, 2004.

  1. kevster30

    kevster30 Club Guest

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    M Series Engine SpecBy chanklI believed we discussed the specs of the M50/M50TU/M52/M52TU/M54 before but the 3 series forum has been pruned so all those info was lost. I just spent a bit of time reviewing the TIS (again) and compiled the following specifications information on the M5x engines. The number in hp are U.S number which typically is 1 or 2 hp less than what the other part of the world uses. I try to stay close to the CKD model so some specific model like E46 325Ci or E38 or E53 are not listed. Well, let see how long can these spec info survived in this forum.The M50 engine was first introduced in 1990 in the E34 525i replacing the M20 engine. In 1993, the M50TU replaced the M50 engine in the E35 525i and E36 325i. In this spec, the maximum torque arrive at a lower rpm compared to the M50 engine.M50B20 110KW/6000rpm, 190Nm/4700rpmM50B20TU 110Kw/5900rpm, 190Nm/4200rpmM50B25 141KW(188hp)/5900rpm, 245Nm(181lb.ft)/4700rpmM50B25TU 141KW(188hp)/5900rpm, 245Nm(181lb.ft)/4200rpm (E36)M50B25TU 141KW(189hp)/5900rpm, 250Nm(184lb.ft)/4200rpm (E34)The TU stands for Technical Update, which offer a new Engine Conrol System (DME 3.3.1) and the introduction of Variable Camshaft Control (through VANOS) which gave improved torque curve, lower fuel emissions, better idle quality, and lower fuel consumption as compared to the M50 engine.M52B20 110KW/5900rpm, 190Nm/4200rpmM52B25 125KW/5500rpm, 245Nm/3950rpmM52B28 142KW(190hp)/5300rpm, 280Nm(207lb.ft)/3950rpmThe M52B28 engine was available on the E36 328i and E39 528i in CKD form. The earlier batch of M52 engine incorporate a cast iron cylinder block while the later batch was make of alunimium silicone alloy. (I found out recently that the earlier batch of 328i use the same cylinder head as the M50TU. The different is in the number of holes for cooling has increased. There are other differences in the cam design and hydraulic lifters but I wouldn't go into details. Now I know why we don't hear M52 engine overheat that often). Engine control is via the Siemens MS41.1 system.When the E46 was launch in 1999, the M52TU engine was introduced in E46 323i, E46 328i and the E39 528i. The major changes in this Technical Update is the redesigned crankcase, modified pistons, Double VANOS for the camshaft drive, and Siemens MS42 DME syste. Later the E39 523i was introduced with the M52B25TU engine.M52B25TU 126KW(170hp)/5500rpm, 245NM(181lb-ft)/3500rpmM52B28TU 144KW(193hp)/5500rpm, 280Nm(206lb-ft)/3500rpmIn 2000/2001, the M54 engine replaced the M52B2xTU engine. These are available in the E46 320i, 325i and 330i, E39 525i and E39 530i. Interesting to note is that the E36/7 Z3 2.5 and Z3 3.0 also uses the M54 engine!M54B22 125KW(170hp)/?, 245Nm(181lb-ft)/?M54B25 141Kw(189hp)/6000rpm, 244Nm(180lb.ft)/3500-4750rpmM54B30 170KW(228hp)/5900rpm, 298Nm(220lb.ft)/3500-4750rpmNoticed the range of rpm for the torque. I remember 3er mentioned something on the infinite variable camshaft control. I have yet to dig up more on that.The development objectives of the M54 engine were to reduce emission and fuel consumption levels while maintaining power and performance compared to the M52TU six cylinder engines. In the M54B30 engine, the changes include shorter skirt pistons, forged crankshaft, higher lift camshaft, shorter ram tubes intake manifold, slightly large injection valves. On the M54B25 engine, most of the features in the M52 engine were carried over. New on the M54 engine is the use of Siemens MS43.0 engine management system which is an electronic throttle control system adopted from the ME7.2 system on the M62 engne.It is tough going through all the spec! The version I had don't have a complete picture yet. Anyone want to do some home work on the M4x or M6x series engine spec?I'll try to dig out more on the transmission unit next time
     
  2. E46 2.2

    E46 2.2 Club Guest

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    Kev..

    Im a bit confused with all the 3 Series E46 Specs..
    1)M Spec
    2)Japan Spec
    3)UK Spec....what is the different?
     
  3. jojo

    jojo Club Guest

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    mie!

    M spec is made especially for those with Malaysian heart laar!

    ha.ha.ha.....
     
  4. tkew

    tkew Club Guest

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    I think generally most of the car are the same from factory, japan spec is for those ship to japan with some different in accesories, UK spec is for those sell in uk and the same with some accesories different or may be some who say with few hp diff.
    M spec i think most of them refering to M sports... sure u know the diff lah...
     
  5. AmirMivec

    AmirMivec Club Guest

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    Tronic ? step, valve, shift tiptronic?

    Hi all,
    I'm consider newbie here in the BMW world. Something, everything confuse me actually. What is shifttronic. Some car model come with this word and some with tiptronic and to make more confuse when steptronic is added.

    I assume valvetronic is something like Mivec on Mitsubishi and VTEC on Honda.
    Steptronic is gear change by hitting on pedal in control manner..? and shiftronic is when automatic gear shift or knob is activate by hand. Tiptronic is when fingertip is use to change gear???? And automatic gear is auto gear shift like any other auto car?::confused:

    Wah....do i sound so outdated and kampung/ulu??:eek:

    Can anybody willing to explain this basic thing?
     
  6. funfer_fahrer

    funfer_fahrer Club Guest

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    Amirmivec,

    I thought you already sambar your 3 series. By now, you are suppose to discuss sports rim, body kit and superchip already.
     
  7. fabianyee

    fabianyee Founding Member

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    these 'tronic' terms are about the same thing but different manufacturers decide to use their own terms.

    Technically, Valvetronic is not THE SAME as MIVEC or VTEC although there are some similarities in principle. Valvetronic controls the opening of the intake valves and did away with the throttle body. MIVEC and VTEC changes the cam profiles.
     
  8. mwtang

    mwtang Club Guest

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    how about a E46 , 320i? is it a m 52 or m54 ? i am confuse here ... its a Year 2000 production car. I have checked the VIN and it says M52.
     
  9. aramis

    aramis Club Guest

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    Its a M52 engine. As far as I know, there are 2 version of 320i, M52b20 and M52b22. One is the 2liter and the other one is the 2.2 liter.

    M52b20 150hp
    m52b22 168hp (if im not wrong)
     
  10. mwtang

    mwtang Club Guest

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    thanks mate for the confirmation
     
  11. BMW_VCEC

    BMW_VCEC Club Guest

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    Question:

    What is the diff in engine between 2005 525 M-sport vs 2008 525 M-sport?

    Both 218 bhp but the later one call magnesium engine?
     
  12. izam171

    izam171 Club Guest

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    Magnesium???
    if im not mistaken,its supposed to b lighter n more powerfull,izit???

    hmm,im confused with mine too actually..
    if anyone can help me...
    i just got myself a 2003 J spec M sport 318I.
    How can i check the VIN thing?
     
  13. thule

    thule Club Guest

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    it's quite tricky here...
    there are 2 types of engine for 2005 E60... one is M54 which is basically 192 bhp while the other one is available in E60 from as early as September 2005 onwards... this engine is called N52(218bhp) which is what they called "Magnesium Engine" where u normally find in Motor Trader...
     
  14. t2ribena

    t2ribena Club guest

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    the 2008 e60 525/530 has the newer N52 known as the N52N for some countries and N53 as well...
     
  15. RadicalE34

    RadicalE34 Club Guest

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    So if a 520i 1996 Model 24Valve I-6.......is M50B20TU???? Techinical Update with Single Vanos?? ....
     
  16. elwine30

    elwine30 Guest

    yes correct.
     
  17. RadicalE34

    RadicalE34 Club Guest

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    Thanks Bro....

    so it is 150hp stock?? Do you think installing Sprint Booster will increase the torque?? Hehe.....
     
  18. bimmerholic

    bimmerholic Club Guest

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    Is M52TU also throttle by cable or wire?
     
  19. deep3102

    deep3102 Club Guest

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    Betul ka? my E39 is a CBU woh..
    can justify pls..
     
  20. bimmerholic

    bimmerholic Club Guest

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    also available in CBU units too bro.
     

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