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Thread: E34 M50B20 stroked to 2.3l + 30psi boost Triple turbo

  1. #1
    Join Date
    Aug 2012
    Location
    Estonia
    Posts
    25
    My Cars
    1995 BMW E34

    E34 M50B20 stroked to 2.3l + 30psi boost Triple turbo

    Hi! My name is Raimo, im from Estonia and this is my car. Its from 27/02/1995 and i have been owning it for 5 years. This is what it looked like when i got it:




    Short after i got it, i started modding it:




    Then i wanted to make car faster and thats when i installed my first turbo. The turbo was a small Garrett TB2514 turbo from M51D25 engine. It didnt make a lot power but it was better than NA. I think it was about 200hp when i finished it.
    Low budget build:


    Soon i wanted to make more power from this engine and i decided to build stroker using stock pistons, 135mm rods and b25 crank. Turbo was 16T from Volvo. I think i was making near 300hp.




    About year after that this happened: Two K26 turbos from Audi.

    And i painted the car:





    The powerband was terrible with those turbos and 2.3l engine. I wanted to built something that would spool up quick and last until rev limit. Something like this:
    http://www.bimmerboost.com/images/im...20597675-1.jpg
    And i did it:





    https://www.youtube.com/watch?v=1OuJxAK8YMA&index=1&list=UUVEtbK87RKx5FqJs 7UfrHuQ


    I have a lot of testing and tuning to do with this setup and i have some things i need to change like adding a valve to intake to bypass smaller turbos..

    So right now i have:
    M50B20 block
    M50B20 ported vanos head
    M50B25 crank
    M51D25 modded pistons and rods
    ARP head studs
    Stock head gasket + gasket cement
    TD0411g turbos x2
    Holset HX55 from scania
    Intercooler from scania
    630cc injectors that i have to change for bigger ones (near 95%DC at 30psi)
    1x Bosch 044 and second one coming
    Sachs race engineering clutch
    And so on..

    Hope you like it

  2. #2
    Join Date
    Mar 2011
    Location
    Neverland
    Posts
    1,721
    My Cars
    E34 525i
    All the time i spent in estonia and i never got to see the mad car culture there. I gotta say though i dont think the bottom end is going to like that much boost for long.

  3. #3
    Join Date
    Nov 2009
    Location
    Long Island, NY
    Posts
    5,335
    My Cars
    67mm 325i, RAM 1500
    Wow lets get vids and numbers!

  4. #4
    Join Date
    Jun 2005
    Location
    virginia beach
    Posts
    942
    My Cars
    Turbo S52 E39 M5
    I like that it's a unique setup. I feel like it would take some trial and error to get a setup like that working efficiently. I hope it works out!
    But those wheels need to go, bro.

  5. #5
    Join Date
    Aug 2005
    Location
    LI NY
    Posts
    10,250
    My Cars
    Turbo 99' M3 - 570whp
    I can't believe you were able to cram that much stuff in that engine bay...

    I actually really like the style of the car too, nice job man !

  6. #6
    Join Date
    Mar 2011
    Location
    Neverland
    Posts
    1,721
    My Cars
    E34 525i
    Quote Originally Posted by jszy25 View Post
    I can't believe you were able to cram that much stuff in that engine bay...

    I actually really like the style of the car too, nice job man !
    e34 bro. theres probably enough space for a second hx52

  7. #7
    Join Date
    Nov 2005
    Location
    Linden, NJ
    Posts
    4,065
    My Cars
    97 M3T, 02 M3T, 89 E30
    I like the latest styling of the car. It's different, but not retarded different. I commend your cobbling skills, but you are asking for a ton of headaches with that triple setup!
    97 M3 - 8.94@164.33 - 8 sec street machine, all BMW driveline, factory ECU
    02 M3 - 9.74@145.99 - Maximum PSI stage 2 turbo kit, stock motor, factory ECU
    16 M3 - 9.47@149.22 - MaxPSI downpipes/exhaust/intakes, HCP/MaxPSI flash, Pure turbos, Dodson clutches, EOS intake/intercooler
    BMW SOB's turbo E30 - 8.72@158.39
    follow our latest builds and upcoming events! - facebook.com/maximumpsi - instagram.com/maximumpsi

  8. #8
    Join Date
    Oct 2006
    Location
    Toronto, Canada
    Posts
    3,012
    My Cars
    E36 Turbo
    Quote Originally Posted by mike radowski View Post
    I like the latest styling of the car. It's different, but not retarded different. I commend your cobbling skills, but you are asking for a ton of headaches with that triple setup!
    Agreed... all about KISS.

    +1 for being different though

    E36 DYNO TUNING WIRING PARTS

  9. #9
    Join Date
    Oct 2010
    Location
    Upstate
    Posts
    2,197
    My Cars
    E28
    Wow, very interesting setup... Could that small turbo bypass valve just be a check valve? I think it would open up when the Holset is giving the small guys too much to eat. Although maybe it would be better to have a boost activated valve to avoid overspinning the small turbos to the point that they are choking.

  10. #10
    Join Date
    Nov 2005
    Location
    Lithuania,Northern Europe
    Posts
    124
    My Cars
    BMW
    Something different Cool idea.
    E30 325i '90 - M50B25 stock + ARP + HX52 + E85 = 651WHP
    E46 330cd '04 M-Technic
    E92 335i '10 M-Technic


    Dynapack 2WD 1500HP Dyno

  11. #11
    Join Date
    Jun 2012
    Location
    Tallahassee, Fl
    Posts
    1,180
    My Cars
    1989 535i/5
    Quote Originally Posted by litemup View Post
    But those wheels need to go, bro.
    I like the wheels... Nice reading through something different, keep it up!

    '89 535i/5 Holset WH1E turbo
    Follow my m106 megasquirt build thread: http://forums.bimmerforums.com/forum...Squirt-content

  12. #12
    Join Date
    Aug 2012
    Location
    Estonia
    Posts
    25
    My Cars
    1995 BMW E34
    IRL those steel wheels look mutch better, but i sold them already. Now i have BBS RS reps for now.



  13. #13
    Join Date
    Oct 2012
    Location
    Green Lake Wisconsin
    Posts
    906
    My Cars
    1991 BMW 325i
    Haha I sure love seeing something different like this, but don't you think 2 turbo's would have been enough for an efficient compound setup? sweet idea though. Always wanted to build a compound setup.

  14. #14
    Join Date
    Aug 2012
    Location
    Estonia
    Posts
    25
    My Cars
    1995 BMW E34
    I wanted to build something different. Worlds first triple/compound turbo E34!
    Does anyone know where i could get stronger/racing intake/exhaust valves for b20 engine? B25 Valvesprings should fit with b20 engine. I want to increase RPM limit, but too afraid to use stock valves.

  15. #15
    Join Date
    Aug 2012
    Location
    Estonia
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    25
    My Cars
    1995 BMW E34

  16. #16
    Join Date
    Oct 2006
    Location
    air, dirt, fire, water
    Posts
    16,556
    My Cars
    95M3 92525iT 78810 95525
    Nice.

    So it looks like it's running
    on some sexy style 5's now
    with a blue baby in the back seat (keep the windows rolled down so she can breathe)

    but
    show us the numbers.

    Where'd she land?
    dyno?
    1320 ft ?

    We know that dippy did the double
    but the we're Trippin' to see the Triple.


  17. #17
    Join Date
    Oct 2010
    Location
    Huntsville, AL
    Posts
    1,864
    My Cars
    95 M3
    Quote Originally Posted by milKt View Post


    We know that dippy did the double
    but the we're Trippin' to see the Triple.
    Hahahahah

    +1
    WOT

  18. #18
    Join Date
    Mar 2012
    Location
    Baltimore, Maryland
    Posts
    4,485
    My Cars
    1999 740iLA, 1990 535iM
    Updates?
    1990 Bmw 535i

    1999 740iL: Sold
    1997 740i: Crashed and Parted
    1988 535i: Crashed and Parted
    1988 528e: Crashed and parted

  19. #19
    Join Date
    Aug 2012
    Location
    Estonia
    Posts
    25
    My Cars
    1995 BMW E34
    I really wanted this update to be with some dyno numbers, but oh well. I promise next year.
    Yes i still have the car and it runs great. I did blow a head gasket 6-7 months ago, but that was from my own stupidity. I ported the exhaust housings and wastegate ports to gain more exhaust flow. Didnt drive the car for a month and forgot all about porting and stuff. That made my AFR to go too lean and stuff happened. Also i did not have the boost gauge and AFR gauge installed on the dashboard because i wanted the dashboard to look stock. I knew that i could always connect my laptop to the ecu and see everything. (Or my phone with bluetooth), but i didnt that time. I also replaced my HX55 to new one.

    I made a small video, i i hope you like it. (I have english subtitles)
    I dont know when the next update is going to be, but thanks for the support.

    https://www.youtube.com/watch?v=JewgaYoTkUI

  20. #20
    Join Date
    Apr 2006
    Location
    Minnesota eh?
    Posts
    5,591
    My Cars
    86 325es
    cool project, nice work!


    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

  21. #21
    Join Date
    Aug 2012
    Location
    Estonia
    Posts
    25
    My Cars
    1995 BMW E34
    477hp (5600rpm) / 670nm (4800rpm) @ 1.6 bar/23psi of boost. I have to revisit dyno because i had the n75 solenoid connected wrong and i did not get the boost to 2 bar.
    Last edited by RaimoHal; 09-08-2017 at 12:22 PM. Reason: Added picture

  22. #22
    Join Date
    Aug 2012
    Location
    Estonia
    Posts
    25
    My Cars
    1995 BMW E34

  23. #23
    Join Date
    Jan 2008
    Location
    Louisville, KY
    Posts
    10,092
    My Cars
    turbo m3
    How did I miss this thread 3 years ago?


    Very cool!

  24. #24
    Join Date
    Aug 2012
    Location
    Estonia
    Posts
    25
    My Cars
    1995 BMW E34

  25. #25
    Join Date
    Aug 2012
    Location
    Estonia
    Posts
    25
    My Cars
    1995 BMW E34

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