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

  1. #101
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    E21 M50 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.
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  2. #102
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    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 0°C 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
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  3. #103
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    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, S476sxe, ProEFI 128 ecu, e85, solid rear axle, TH400 trans, 28x10.5w slicks, zip ties, popsicle sticks, tape
    best time 9.06 @ 151.8 mph, best 60 foot 1.30

  4. #104
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    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:

    m50b25TÜ - 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...
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  5. #105
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    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
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  6. #106
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    Good thing you figured it out. I was going to recommend this stuff...


  7. #107
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    Brake update 2019



    e21 brembo.jpg

    e21 brembo_2.jpg
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  8. #108
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    Adapter design done


    bremsadapter e21.jpg
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  9. #109
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    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, S476sxe, ProEFI 128 ecu, e85, solid rear axle, TH400 trans, 28x10.5w slicks, zip ties, popsicle sticks, tape
    best time 9.06 @ 151.8 mph, best 60 foot 1.30

  10. #110
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    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.
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  11. #111
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    Last edited by PowerKraut; 01-11-2019 at 08:08 AM.
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  12. #112
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    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  13. #113
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    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.
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  14. #114
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    First test fit of the new adapters before milling them. looks promising. To be honest, i have never driven a damn e21 ever in my life so i dont know it oem setup sucked that hard :P but now its 316mm disc with 4 pots on the front and 280mm disc with 40mm piston on the rear and that should make the little car stop.


    20190123_175258.jpg
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  15. #115
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    Lasered a set of reinforcement plates for the roll cage. Made them fit just today. I am not so happy with a few of the mounting positions of the cages feet. Especially on the very front a pillar cage foot i can just drill into weak sheet metal i had to weld in to get rid of rust & holes, but it has just very weak structural strength compared to the oem floor panels with all its bends and its profile. Maybe i will tack another sheet metal support bracket on there, connecting the mounting point with the sill to stiffen it all up.


    20190127_143329.jpg

    And i have to get rid of the sunroof tunnel. The cage was obviously designed for a car without one and i had major issues to even get it in there. I am a bit mad i already painted the car on the inside and now its all f*ed, but well, i think a cage is worth the hassle. :P

    20190127_143253.jpg

    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  16. #116
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    Sunroof tunnel removed

    20190514_162241.jpg

    Cage repainted flat black

    20190514_124016.jpg

    Closing the sunroof with aluminium sheet metal

    20190416_170220.jpg

    Enlargin CCV to twin dash 10 and painted the valve cover in flat black. the green paint came of due to heat :/

    64726561_684276152031749_8347389422198587392_n.jpg

    redone the cooling system with silicone hoses

    20190802_192639.jpg
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  17. #117
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    milKt is offline ßMW///MµrÐêr§þðr†
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  18. #118
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    Mein E21 besitzt eine Sauerkrauteinspritzung mit Hochgeschwindigkeitsbratwurstturbine.

    I ran into another problem yesterday. I use a tachometer thats usually coil driven (analog) and of course it wont work with the 0-12v square signal of the ecu. Is there a guide to resolder it properly or some other option besides buying a VDO 300 bucks tacho?


    I contemplated splicing it into the COP trigger wires, but i am somehow afraid to fry my ecu ignition driver?!
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  19. #119
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    cleaned bay.jpg

    tidied the bay a bit and wired clutch switch. set up launch control today.
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  20. #120
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    Setting up Launch Control with the GF

    Last edited by PowerKraut; 08-26-2019 at 03:52 PM.
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  21. #121
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    Slow progress.

    Ordered a 3 port MAC valve for boost control an fiberglass hood from Czech.. hope i will ever receive it...
    Working on the Interior and head and taillights to get it somewhat roadworthy.

    20190808_201227.jpg

    i really want to go out and road tune it for low boosts (8-10 psi) , but need some kind of dealer plates... hard to get and still not 100% legal :|
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  22. #122
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    20190830_172746.jpg20190829_190245.jpg


    20190829_190245.jpg

    fiberglass hood vom pesch motorsport czech arrived. pretty good, sadly it good a very ugly kink right on the nose. :|

    Can it cope with the heat of the charger? I got a turbo diaper on the hotside, but the compressor housing touchess the hood.. maybe i will put some heat shielding material on the inside of the hood?
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


  23. #123
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    The good thing is that it is fibreglass so adding a bulge where the compressor is will be easy. Fixing the kink shouldn’t be bad either.

  24. #124
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    you are pretty brave for doing this massive work with the polizei waiting for you in german roads

  25. #125
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    Sounds awesome. Too loud for my liking inside it. Screamer pipe as well. :*

    Pretty fast aswell. On low boost somewhere in the low 300 whp range i guess, even thats pretty okay in a stripped e21




    Last edited by PowerKraut; 09-10-2019 at 11:29 AM.
    1982 E21 323i
    M50B25 Turbo
    Borg Warner S362 SX-E
    ECU Master Emu


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