A Guide To Tuning & Performance Upgrades for 4-Cylinder M4x Engines - Page 6
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  1. #51
    BFI Noob
    boostmoose's Avatar
    Join Date
    Dec 2016
    Location
    Estonia
    Posts
    8
    Car Specs:
    Year
    1991
    Model
    E36
    Engine
    M40B18 turbo
    Fuel
    Petrol
    Thanks
    0
    Thanked 9 Times in 4 Posts


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    Just wanted to give you guys a little update...
    the m40 on my picture has ran on 2,4bar of boost Sadly a month before that with 1,6bar i got detonation which bent conrods but only symptom was that spooling went from 4k to 5k rpm
    That's why i just turned the boost higher.. at last dragrace i ran 2,4 bar and everything was ok exept the bad spool, but while installing launch control at the end of first day, i blew headgasket.
    That's how i discovered the bent conrods Everything else was okay.

    Now assembling it with new rods(still stock) and cometic headgasket. Also some head work will be done to avoid detonation a bit better. Turns out m40 has tendency for detonation due to bad shape of combustion chamber

    Anyway, when assembled, i'm going straight to dyno and i'm still aiming for atleast 450bhp
    -0111133195ad977-jpg

  2. The Following User Says Thank You to boostmoose For This Useful Post:

    E36 TDS (10-10-2017)

  3. #52

    Michiel838's Avatar
    Join Date
    Oct 2017
    Location
    Belgie
    Posts
    3
    Car Specs:
    Year
    1996
    Model
    E36 318i
    Engine
    M43b18
    Fuel
    Gasoline
    Thanks
    0
    Thanked 0 Times in 0 Posts


    m43b18 injectors

    hello
    i'm new and i drive a e36 from 1996 with the m43b18 engine. i have rebuilt the motor and replaced al the gasgets but didnt put in forged pistons enc. I have a turbo for it and I have the megasquirt 2 to run the car. but the onley thing thats holding me back is the injectors. i want to put in larger injectors but i downt know witch one i have to put in... do you know witch injectors fitt? maybe from a diffrent car or new injectors? so i can built the motor and does someone know if i run the megasquirt on it what do i need to do with the ews?

    it was a very interessting post and i think i'm going to put a 325 flywheel on it.

    thanks for the reply!

  4. #53
    BFI Noob
    boostmoose's Avatar
    Join Date
    Dec 2016
    Location
    Estonia
    Posts
    8
    Car Specs:
    Year
    1991
    Model
    E36
    Engine
    M40B18 turbo
    Fuel
    Petrol
    Thanks
    0
    Thanked 9 Times in 4 Posts


    There's no need to do anything with the EWS.

    Forged internals are needed for high horsepower, if you have read my post or maybe even my thread in projects forum, then you would know, that stock internals can take way more than most people dare to go for.

    Injectors are picked by horsepower you want. MS has very big database at megamanual.com.. so start reading - everything you want and need to know, is in there

  5. #54

    Michiel838's Avatar
    Join Date
    Oct 2017
    Location
    Belgie
    Posts
    3
    Car Specs:
    Year
    1996
    Model
    E36 318i
    Engine
    M43b18
    Fuel
    Gasoline
    Thanks
    0
    Thanked 0 Times in 0 Posts


    Thanks, and yes i read the post i'm aiming for 180 at the wheel to begin with? Is that reliable? But there for i need to swap my injectors do you know where to find them? Or can i use fuel rail spacers to fit larger ones?

  6. #55
    BFI Noob
    boostmoose's Avatar
    Join Date
    Dec 2016
    Location
    Estonia
    Posts
    8
    Car Specs:
    Year
    1991
    Model
    E36
    Engine
    M40B18 turbo
    Fuel
    Petrol
    Thanks
    0
    Thanked 9 Times in 4 Posts


    Most injectors are standard length.. so i see no need for spacers. But whatever injectors you find, ofcourse you're allowed to use spacers or whatever it takes to install them.
    Anything from 330cc and bigger will be more than enough for you with that hp.
    Look for cars that are turbo from factory. Volvo T4/T5 engines, Saab 2.0/2.3 engines, Audi turbo engines and so on. Google has the info where you can find needed injectors exactly

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