BMW newbie engine conversion advice

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  1. BMW newbie engine conversion advice 
    #1
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    Hi guys!

    I am looking for some advice on engine conversions. I have done plenty of work on impreza engine mods etc but I am new to the bmw scene. I have bought a vgc 98 318i touring but obviously the motor doesn't have much kick and I would like to stick a larger motor in her and was wondering what the best route to go is? Am I better tuning a 2.5 or 2.8 motor? Or am I better sticking an m3 motor straight in there? Which is easier? Are there any points I need to pay particular interest to? Pro's and con's etc? Any and all advice will be greatly appreciated as like I say I am new to bmw so even simple things I might overlook.

    Thanks guys.
     
     

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    #2
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    with the 2.8 motor you will only see 240 bhp with a few small mods M50 manifold remap if you add USA M3 cams 260bhp
    with the 3.0 M3 motor you will have 280 bhp
    with the 3.2 M3 motor you will have 321 bhp
    both M3 are very hard to tune unless you go for forced induction
     
     

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    #3
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    And with your knowledge which is the best/most worthwhile doing? I don't want to waste my time with a motor that will cause me too much hassle with hardly any reward
     
     

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    #4
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    This is using a e36 328i engine

    Our remap on a standard 328i will make the car as quick if not quicker than 328i with m50 manifold with no remap to suit due to the extra torque it will have compared with a 328i with m50 manifold and NO remap
    Been tested
    Here's a dyno of a 328i


    A 328i with m50 manifold fitted will make around 208-212bhp on a dyno dynamics rolling road with or without bbtb fitted (see 2nd dyno graph)
    but will have a flat spot before 3500-3700 different software can help the flat spots
    Been tested


    A 328i with m50 manifold fitted
    our remap
    Standard air box fitted
    Will make 230-235
    Been tested
    Cold air induction kit fitted with above mods will make 235-239bhp



    A 328i with
    m50 inlet manifold fitted
    m3 exhaust manifolds and full system
    Standard air box
    No remap will make 220-224bhp
    With our remap will make 240-243bhp
    Been tested
    Standard air box holds back power
    With cold air induction kit our remap makes 248-252bhp and revs up much faster
    been tested
    See pembo's 328i
    http://www.bmwowner.com/forum/viewto...16501#p2016501


    328i with m50 inlet manifold
    Air induction kit
    USA m3 cams
    Our remap on t1000's car back in 2006 made 263bhp there is loads of room for improvements in the mapping on this car still

    After Morgan t1000 fitted m3 exhaust manifolds it lost power on this car (will need retuning to suit m3 manifold set up)


    I've found that m50 manifolds that have been fitted using hose pipes and the 90 degree pipe connectors(take longer to install but alot cheaper)have made the same power as the machined m50 manifolds which are a nicer fit and easier to install

    Bbtb fitted have made no difference to a remapped car but have helped throttle response on cars with no remap installed

    Standard air box is good for up to 230ish bhp

    Cold air induction kit like Dave F or Simota helps car to rev up faster and more bhp on cars after 230bhp with m3 exhaust manifold and full system fitted

    You may need to shorten the lamda sensor mountings on the m3 exhaust manifold so the lamda sensors fit further into the exhaust gas stream

    With these mods and m50 with induction kit m3 headers our remap you will be looking at around 250bhp

    We can also remove the ews bmw's immobiliser from the Ecu with the AC working so you will not need to wire up the ews
    Or we can reset your ews from your car so it will work with your new engine

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    the 2.8 is the easy option as you can get a mot failure and then you have every thing you need from under the bonnet + brakes suspension gear box diff
    something like this
    BMW E36 328i Coupe. Engine only 70000 miles. Spares or repair. Madeira Violet. | eBay
     
     

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    #6
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    Brilliant thanks. I have access to a 98 2.8i automatic with 86k on the clock. Apart from changing the flywheel anything else I should watch out for? Shall I bring across anything else across from the 2.8 donor apart from engine ancillaries?
     
     

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