A Guide To Tuning & Performance Upgrades for 4-Cylinder M4x Engines - Page 6
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  1. #51

    boostmoose's Avatar
    Join Date
    Dec 2016
    Location
    Estonia
    Posts
    4
    Car Specs:
    Year
    1991
    Model
    E36
    Engine
    M40B18 turbo
    Fuel
    Petrol
    Thanks
    0
    Thanked 2 Times in 2 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)

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