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Thread: Injectors

  1. #1
    Join Date
    Apr 2008
    Location
    Greenwich, CT
    Posts
    1,991
    My Cars
    1985 BMW 635csi

    Injectors

    Hello all,
    I'm about to pull the injectors on my high compression euro engined m30 to send them to Witchhunter for refurb.

    Before I do, does anyone have any other suggestions on an alternative set-up? Would m30/b35 injectors be a better choice? I have a spare set of those in my parts bin.

    Thanks.

  2. #2
    Join Date
    Feb 2009
    Location
    Pittsburgh, PA
    Posts
    979
    My Cars
    E24 & many E30
    That's a good plan, matched injectors are a good thing to have.

    I'm currently trying out a complete B35 setup on my Euro B34 including stock injectors and DME. It ran very well until my recent stalling/rough idle/1222 code troubles. I haven't put enough miles on it to make any firm recommendations yet.

    I've also picked up a set of Bosch 4-hole disc-type injectors to test out. PN 1 280 155 746, 200cc@3 BAR. From what I've gathered, they're a direct fit: high impedance, square plug, slots for fuel rail retaining clips. They're also very common & cheap; installed in many transverse-engined non-turbo Volvos from the late 90s until the mid-00s.

  3. #3
    Join Date
    May 2006
    Location
    Spokane WA
    Posts
    373
    My Cars
    89 635CSi, Mazda CX9
    I had one of my original "150,000 mile" injectors go TU. Talking to a fellow in the local club here, he said look at the Bosch type 3 injectors. Jeep 4 Liter, Mustang, and many others. I picked up a full set of 19-21 LBS 4 holes, oh my goodness what a difference. Not sure about performance, but those new injectors make the car run so much smoother. Original single nozzles may have done the same thing compared to the old gunked up ones but I sure like the way they worked out.
    SprCpe
    1989 635csi # 3268410
    Built in Germany with love.
    Ostatecznym maszyny jazdy BMW

  4. #4
    Join Date
    Apr 2008
    Location
    Greenwich, CT
    Posts
    1,991
    My Cars
    1985 BMW 635csi
    Thanks SprCpe. I just purchased the same injectors. Hoping I'll get similar results.

  5. #5
    Join Date
    Apr 2004
    Location
    Anacortes,WA
    Posts
    1,172
    My Cars
    E34 535i; E36 325is
    My '85 Shark got about 10% better highway fuel economy, plus better idle and throttle response with Bosch/Mustang 4 hole injectors, plug and play. These can be found at any junkyard in Ford Mustang, Crown Vic, etc. I paid $30 for a set of 6 from a guy on MyE28.com.

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