1998 e36 1.9 Z3 - M44 supercharging thread - Page 4

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Thread: 1998 e36 1.9 Z3 - M44 supercharging thread

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    #31
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    Quote Originally Posted by markrnorton View Post
    The lack of boost is not a leak !! its the lack of crank pulley

    on further investigation the UK crank pulleys are smaller in diameter than the US ones, so hence the lack of outright boost.
    i am trying to get a small s/c pulley to compensate for this.

    got the plugs out at the weekend, looks like it may have run slightly lean initally before the re-map. got some new 'cooler' running plugs on order . couldnt seem to find any copper core plugs in the usual shops, only the expensive iridium or platinum.
    bit of a result then Mark and relief as you know what it is now.. boost leaks can be a right biatch to track down! LOL!!

    Have you managed to track down the part number on RealOEM/BMW Fans and done a cross reference to see if the US crank pulley was ever used on any cars over here? - alternatively you could get the part number and put it into Coopers BMW to see how much it would be: http://www.cooper-bmw-parts.co.uk/

    As for copper core plugs then check: http://www.spark-plugs.co.uk/ they seem to list Champion RC89TMC plugs for your car (which are copper core) - although best check I put the correct details/engine in for your car!

    * 2016 BMW M135i LCI (F20): current
    * 2016 Mercedes Benz GLA 200d AMG Line (X156): current
     
     

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  4.  
    #32
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    Been checking OEM and it states the pulleys are the same, however, other members in the states have measured and say otherwise.

    so far as plugs, i have ordered them now, the issue was getting a grade colder, nobody seemed to stock them

    should come this week now.

    trying to sort out a new pulley for the s/c to bump boost to circa 9psi
    Z3
     
     

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    #33
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    Quote Originally Posted by markrnorton
    trying to sort out a new pulley for the s/c to bump boost to circa 9psi
    not like Realoem to be wrong..

    is 9psi a lot for your supercharger/current set up? - what kind of boost can they produce before the dreaded flame-thrower effect comes into play? hopefully you'll get near the 230 bhp mark with that!

    * 2016 BMW M135i LCI (F20): current
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    Great thread !!!
    Another Brave and skilled member here on the forums .

    Money eating monster .
     
     

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    #35
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    just had a look at the crank pulley, unless the US guys have a smaller water pump pulley i cant see how the crank pulley could be any larger.

    still going to source a smaller s/c pulley for more boost.

    you can run around 9-9.5psi with standard injectors ramped up, after that apart from fueling being an issue the charge temp increase, so it would need some kind of cooling, maybe water injection.

    i think 9psi boost should yield the 230hp i'm looking for.
    Z3
     
     

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    #36
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    Quote Originally Posted by markrnorton View Post
    just had a look at the crank pulley, unless the US guys have a smaller water pump pulley i cant see how the crank pulley could be any larger.

    still going to source a smaller s/c pulley for more boost.

    you can run around 9-9.5psi with standard injectors ramped up, after that apart from fueling being an issue the charge temp increase, so it would need some kind of cooling, maybe water injection.

    i think 9psi boost should yield the 230hp i'm looking for.
    good luck with getting the smaller s/c pulley! - looking froward to the results!! - mine goes in this Friday to get my shiny bits fitted!

    * 2016 BMW M135i LCI (F20): current
    * 2016 Mercedes Benz GLA 200d AMG Line (X156): current
     
     

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    #37
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    i was busy with the car on saturday, taxed and went for a blast.

    this highlighted a couple of problems.

    firstly, the top hose was still too hot compared with the bottom hose
    secondly, it meant remedial work !

    changed the plugs, went for a grade colder this time, i think the ones i removed were the originals as they have BMW stamped across them. burning a little lean maybe, but its richer now as i have increased fuel pressure to the injectors (i had it mapped) but i have mechanically tweeked it up as well via the RRFPR.
    (I had been watching the AFR whilst driving, well a friend did.)

    Plugs old and new


    then the pesky water hoses. if in doubt whip it out, so thermostat off again and water pump out. this takes only a few minutes when you have no viscous fan to contend with



    both looked ok, but i bought a new water pump just to be sure, not expensive and has the metal impellor


    new pump in and thermostat out (of housing) . so running without a stat. i know some people dont recommend this, but with the increase in engine temps i thought i'd try it. if it ran cold i would put it back.

    went for a 20 miles blast, bled the air out of the water system, all perfect. upto normal temp pretty quick and stayed there. electric fan only came on once , and that was on my drive after the blast.

    the car is much sharper now on pickup and making 7psi. i will order a new pulley this week
    Z3
     
     

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  13.  
    #38
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    Quote Originally Posted by markrnorton View Post
    i was busy with the car on saturday, taxed and went for a blast.

    this highlighted a couple of problems.

    firstly, the top hose was still too hot compared with the bottom hose
    secondly, it meant remedial work !

    changed the plugs, went for a grade colder this time, i think the ones i removed were the originals as they have BMW stamped across them. burning a little lean maybe, but its richer now as i have increased fuel pressure to the injectors (i had it mapped) but i have mechanically tweeked it up as well via the RRFPR.
    (I had been watching the AFR whilst driving, well a friend did.)

    Plugs old and new


    then the pesky water hoses. if in doubt whip it out, so thermostat off again and water pump out. this takes only a few minutes when you have no viscous fan to contend with



    both looked ok, but i bought a new water pump just to be sure, not expensive and has the metal impellor


    new pump in and thermostat out (of housing) . so running without a stat. i know some people dont recommend this, but with the increase in engine temps i thought i'd try it. if it ran cold i would put it back.

    went for a 20 miles blast, bled the air out of the water system, all perfect. upto normal temp pretty quick and stayed there. electric fan only came on once , and that was on my drive after the blast.

    the car is much sharper now on pickup and making 7psi. i will order a new pulley this week
    looks like you're getting their Mark! - even if the water pump wasn't needed I would look at it as more preventative maintenance than anything else.. looking forward to the results with your new S/C pulley!

    * 2016 BMW M135i LCI (F20): current
    * 2016 Mercedes Benz GLA 200d AMG Line (X156): current
     
     

  14.  
    #39
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    Update

    Well had another power run and AFR check done . AFR was a bit lean so we increased the fuel pressure to the rail, this helped out and increased torque slighty. AFR readings were virtually identical to my wideband gauge, so that proves its working fine.

    With the new supercharger pulley the charger is making 9.6psi of boost at max rpm, so thats not a bad increase. Its basically sitting right at the edge of the envelope for the standard injectors and intake charge temp.

    The car is getting pretty hot though now, especially after continuous boosting. Intake charge temp is a bit high. Might have to go water injection.

    Still, ended up with 202lb/ft of torque at 5300rpm and 226bhp. So close to my target of 230hp.

    One thing, strangely enough, that came out of the session, the guys reackon the Simota is holding the car back, they have tested a few back to back on turbo cars and found changing to an ITG filter gained significant hp.

    N/A cars simota is fine, Forced Induction demands alot more air. I have the ITG now and it is superior.

    Maybe get one more session in on the rollers !
    Z3
     
     

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  16.  
    #40
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    oh my god wow!!!!!!!!!!!!! i have just read this entire thing now and im amazed.
    im thinkin i needd to do somew serious saving this is definately the route to take my 318is down and ur pretty much listing everything id need to do and change.

    are you still running standard internals? how much boost will the standard pistons n conrods take?
    318is coupe troop
     
     

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