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Thread: The E21 323i from the scrapyard.... <3

  1. #101
    Join Date
    Nov 2013
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    Gerrrmany
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    E34 Turbo
    So

    M54B30 crank
    M54B30 cams
    M54B30 Pistons
    M50B25 Non Vanos Rods

    Is that setup a time bomb on 500whp or even more? i would try to avoid rod bending tourque, of course.

    spool at 3500 sounds like a nice daily powerband. reving to 7000 should be no problem for the rotating assembly i guess? would have pushed the b25 to that number all day long.

  2. #102
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    E34 Turbo
    Can anyone chime in regarding the b30 setup?


    anyways, i put in the new DW Pump and its pretty silent right now when the engine is cranking. i could not get it to start, it backfired like hell and i could not find the issue. played with cranking angle and tps opening as well as dwell time and injector PW during cranking, but its now 0C and even on e10 i could not get it running...

    i tripple checked everything and now i found out the crank VR sensor has a switched polarity, i still wonder how it even ran in the first place during summer. anyways i found out that the connector on the ecu has a few broken notches, so the pins can maybe slide out.. so i now ordered a new set of connectors and will switch the loom over to the new connectors.

    - - - Updated - - -

    btw: thanks to boris and nisse for supporting me with the troubleshoot <3

    merry x-mas!


    e21 m50 turbo motor.jpg

  3. #103
    Join Date
    Apr 2006
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    Minnesota eh?
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    86 325es
    Quote Originally Posted by PowerKraut View Post
    So

    M54B30 crank
    M54B30 cams
    M54B30 Pistons
    M50B25 Non Vanos Rods

    Is that setup a time bomb on 500whp or even more? i would try to avoid rod bending tourque, of course.

    spool at 3500 sounds like a nice daily powerband. reving to 7000 should be no problem for the rotating assembly i guess? would have pushed the b25 to that number all day long.
    The power will not be a problem assuming you have enough octane but you need to clearance the block with 89.6 stroke and non vanos rods. Gap the rings while your at it.


    86 325es, 2.8L m50, S472sxe, MS3pro Ultimate, e85, solid rear axle, 4 link, spool, TH400 trans, Protorque converter, 28x10.5w slicks, zip ties
    Best = 9.43 @ 149.15 mph, 1.30 60 foot 28 psi boost

  4. #104
    Join Date
    Nov 2013
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    Gerrrmany
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    E34 Turbo
    still trying to get it started, wont catch when i crank... i am lost for ideas...

    setup ran in september at ambient temp of 60F. Now its below 30F and i cant get it to start. just pops an bangs. what i checked so far:


    -ignition timing and angle via timing light
    -coil wiring and firing order
    -spark strength of coils
    -primary trigger (cam sensor)
    -fuel is new and good (E10 fuel)
    -Fuel Pump & Filter & Lines all new
    -Fuel enters combustion chamber, plugs get wet
    -cranking fuel. upped and lowered it no changes whatsoever
    -cranking angle between 9-13 defgrees, no changes
    -second starter battery. cranking at 160-180rpm
    -opened the throttle from 3% (it started like that in summer) up to 18%, no changes. - i have no ICV



    setup:

    m50b25T - all stock with arps
    90mm throttle
    siemens deka 875cc
    stock FPR
    DW 350 inline Pump

    i went from prime pulse between 1-3ms back and forth and from cranking fuel from 4ms down to 2ms and it doesnt do anything good. not even a recognizable change at all..

    i am in for any idea right now. it still looks like the plugs are wet and not firing, but i would like if someone would share his cranking fuel settings with me on a similar setup, injectorwise...

  5. #105
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    Nov 2013
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    E34 Turbo
    Kill me pls. In the end it was just the plugs. God knows why they ran just fine 2 months ago and fouled from standing.. more or less new plugs with 500km on them. Also sparked well when pulled. I really just put a set of used crap ones of a m52 donor engine in, out of sheer frustration and it fired right up. well. at least i have tripple checked
    trigger timing now :|

    20181224_230327.jpg

    oh, and santa brought my new calipers... should be plenty of stopping power for the light e21.
    20181224_231523.jpg

  6. #106
    Join Date
    Aug 2007
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    Vancouver, B.C., Canada
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    My Cars
    '97 M3
    Good thing you figured it out. I was going to recommend this stuff...


  7. #107
    Join Date
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    Gerrrmany
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    E34 Turbo

  8. #108
    Join Date
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    E34 Turbo

  9. #109
    Join Date
    Apr 2006
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    Minnesota eh?
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    86 325es
    Rather than getting it machined, design it so it can be made from pieces of flat plate stacked up so you can just get it laser cut. It will be a lot cheaper.


    86 325es, 2.8L m50, S472sxe, MS3pro Ultimate, e85, solid rear axle, 4 link, spool, TH400 trans, Protorque converter, 28x10.5w slicks, zip ties
    Best = 9.43 @ 149.15 mph, 1.30 60 foot 28 psi boost

  10. #110
    Join Date
    Nov 2013
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    Gerrrmany
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    E34 Turbo
    Thanks for your response. I am well aware it would be a lot cheaper, but the problem is the german safety inspection. Even tho those stacked sheet metal parts would easily handle all forces, you would still not find anyone to approve it. german inspections are the worst there are. so i have to make it a 88mm flak proof brick of steel. i calculated it today and the thinnest part will be 7,5mm thick on a s355mc steel plus 10.9 m12 bolts.. that should be way more then ever needed, but i am still worried if they will approve it... :|

    but i got a good deal on laser cutting and a buddy will machine it on the mill so it will maybe turn out like 30€ a piece for the first mock up.

  11. #111
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    Nov 2013
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    E34 Turbo
    Last edited by PowerKraut; 01-11-2019 at 09:08 AM.

  12. #112
    Join Date
    Nov 2013
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    Gerrrmany
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    E34 Turbo

  13. #113
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    Nov 2013
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    Gerrrmany
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    E34 Turbo
    Butchered a m54b30 -> time for a second engine. 3 liter m50 turbo powa should be plenty for the e21.

    20190120_132524.jpg

    Crank, pistons and rods look okay, cams are fooked, the bearing surfaces are totally scratched :/ wanted to use the intake one for my m50 but i guess its not worth it to fix that thing. its just 240 degrees (still better than my 228 of course) but now that its fooked I think its just not worth it to get it repaired. staying with the stock one maybe until i find hotter ones. US S50 ones (252 i believe? u guys know better) can be had for ~400€ new, schricks and other brand for ~600 a piece.

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