1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

BMW M3 throttle's on k20z4 motor

Discussion in 'Engine Building' started by Hendri, Sep 15, 2014.

  1. Hendri

    Hendri New Member

    Messages:
    20
    Likes Received:
    1
    Joined:
    Sep 14, 2014
    Hi guys looking at installing BMW M3 throttle's on a k20z4 motor, just wanted to find out if anyone has atempted something like it.
    Installed electric water pump (tyred of replacing head gaskets every time the altinator belt comes off and the car overheats) on k20 some tunning and 138wkw 276nm torque, all stock internals.
    The throttle in theory should work, not doing much for the kw but should increase the torque.
    Have seen throttle's on a k20 witch is pushing 151wkw normal aspirated then again the guy spent a 3400 dollars on a set of throttle's. Fully forged motor though.
    Saving money were I can for more mods that make sence.More bang for my buck I guess.
     
  2. CAFROG

    CAFROG Honda Minion VIP

    Messages:
    4,414
    Likes Received:
    150
    Joined:
    Apr 5, 2009
    Location:
    NOR-CAL
    How many mm is the BMW throttle body? I'm guessing it's cable driven.

    I doubt the bolt pattern is the same so you'd need to fab up an adapter plate. Proper TPS and IACV situation? (IACV can be deleted with K-Pro)
     
  3. Hendri

    Hendri New Member

    Messages:
    20
    Likes Received:
    1
    Joined:
    Sep 14, 2014
    Will have to fabricate an adaptor plate and reposition the tps just need to get the injector angle corect with the valves.The intakes ports are almost identical will have to drill, tap and stud for the M3 throttle's on the adaptor plate.IAVC not a problem.
     
  4. Hendri

    Hendri New Member

    Messages:
    20
    Likes Received:
    1
    Joined:
    Sep 14, 2014
    The M3 throttle's are 52mm
     
  5. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

    Messages:
    28,465
    Likes Received:
    228
    Joined:
    Sep 30, 2002
    Location:
    Dallas / Fort Worth, TX
    When it comes down to it a throttle body is a throttle body.. if you're willing to (and know how to) fabricate your own mount setup and linkages it won't be any big deal. 52mm should work fine.
     
  6. Hendri

    Hendri New Member

    Messages:
    20
    Likes Received:
    1
    Joined:
    Sep 14, 2014
    Will post some pics as soon as I get the adaptor plate done with the right angle, the linkages are standard as used in the BMW's the bigest tric is getting the injector angle right to spray direct into the valve chamber.
     
  7. eg6sir

    eg6sir Supa Mod Moderator VIP

    Messages:
    21,703
    Likes Received:
    321
    Joined:
    Aug 17, 2005
    Location:
    661 BK CA
    52mm is small.. stock b-series is 60mm
     
  8. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

    Messages:
    28,465
    Likes Received:
    228
    Joined:
    Sep 30, 2002
    Location:
    Dallas / Fort Worth, TX
    Ooohhh. Thought he was talking individual throttle bodies? His title had an "S" after throttle. Granted there was an apostrophe too, but I assume plural.
     
  9. eg6sir

    eg6sir Supa Mod Moderator VIP

    Messages:
    21,703
    Likes Received:
    321
    Joined:
    Aug 17, 2005
    Location:
    661 BK CA
    Could be... never heard of an M3 coming w/ itb's so I assumed he meant throttle body
     
  10. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

    Messages:
    30,034
    Likes Received:
    3,963
    Joined:
    Sep 28, 2002
    Location:
    CT
    they have always had ITBs
    the e30 had them
    the e36 didnt have them here but had them in Europe
    the e46 had them
    the e92 had them
    not sure about the newest f80 m3 / f82 m4 with the twin turbo inline 6
     
  11. civicious

    civicious FüK-VTEC VIP

    Messages:
    9,855
    Likes Received:
    629
    Joined:
    Jun 15, 2003
    Location:
    Houston, TX
    I assume he's referring to E46 S54 throttle bodies. And yes, they'll work with some fiddlin'
     
  12. eg6sir

    eg6sir Supa Mod Moderator VIP

    Messages:
    21,703
    Likes Received:
    321
    Joined:
    Aug 17, 2005
    Location:
    661 BK CA
    Learn something new every day. :)
     
  13. Hendri

    Hendri New Member

    Messages:
    20
    Likes Received:
    1
    Joined:
    Sep 14, 2014
    Sorry guys yes the throttle's are from the E46 BM trouble u, having a look at the M5 throttle's for the B series as well, might work with a few mods.
    The throttle size 52mm not the ideal size (54 mm -60mm would work better ) but more interested in the lenth of the throttle's make a big difference, so far the lenths that seem to work are between 140-145mm from head to butterfly. Need to check the difference on the dino.
     
  14. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

    Messages:
    28,465
    Likes Received:
    228
    Joined:
    Sep 30, 2002
    Location:
    Dallas / Fort Worth, TX
    Length as well as diameter matter
     
  15. Jeef

    Jeef NO MA'AM Moderator VIP

    Messages:
    7,150
    Likes Received:
    294
    Joined:
    Sep 29, 2002
    Location:
    CT
    Thats what she said
     
    phunky.buddha likes this.
  16. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

    Messages:
    28,465
    Likes Received:
    228
    Joined:
    Sep 30, 2002
    Location:
    Dallas / Fort Worth, TX
    As well as velocity and smoothness of flow through the stack.

    Ba-dum-pssssh!
     
    Jeef likes this.
Verification:
Draft saved Draft deleted

Share This Page