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  1. M43,engine,puzzler 
    #1
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    Hi
    I have a E46 318i saloon 1999 M43tu Engine.118bhp. Tech mags show the Z3 used the same engine.And also listed for the Z3 is a M43 TU producing 140bhp.

    Im told theres not much to be gained (10 bhp) from my engine.So what did BMW do to get the power up to 140bhp in the Z3.The 1.9 engine has the same cc as mine?
     
     

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    The M44 B19 had 140bhp. It's 16 valve
    The M43TU B19 had 118bhp, 8 valve.
     
     

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    Quote Originally Posted by Ronnie View Post
    The M44 B19 had 140bhp. It's 16 valve
    The M43TU B19 had 118bhp, 8 valve.
    Good point ROnnie!!

    I couldnt find the differences between the two

    16 valve head...better breathing for the engine = more fuel and air burnt = more power
     
     

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    Quote Originally Posted by Ronnie View Post
    The M44 B19 had 140bhp. It's 16 valve
    The M43TU B19 had 118bhp, 8 valve.
    I picked this thread up late

    But Ronnie has nailed it
     
     

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    Quote Originally Posted by boostist View Post
    Good point ROnnie!!

    I couldnt find the differences between the two

    16 valve head...better breathing for the engine = more fuel and air burnt = more power
    Quote Originally Posted by A20 RYM View Post
    I picked this thread up late

    But Ronnie has nailed it
    I had to do a little research but it's what I enjoy!
     
     

  8. M43 tu output 
    #6
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    Thanks Ronnie.
    The BMW mag classed it as a M43 TU. Obviously their cockup! So it refered to a M44 16v.

    I dont supposed heads are interchangable????

    Many thanks for putting me right
     
     

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    Don't know that one mate
     
     

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