1998 E46 328 - What is the best way to get some extra hp out of a M52TUB28?

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  1. 1998 E46 328 - What is the best way to get some extra hp out of a M52TUB28? 
    #1
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    Hi , what is the best and cheapest way to get some extra hp out of a M52TUB28?
     
     

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    I'm not 100% sure if it fits the E46 328 (if def suits the E36) but your best bet is the 'M50 Mod'.

    It involves fitting a modified, less restrictive inlet manifold and throttle body. You'd be looking at a real world 25ish bhp for around £500 fitted. There's a forum member called Alpina527 that does the kits and is well recommended.

    Combine this with a good cold air induction kit (DaveF or similar), for a few more ponies/

    After that, get it remapped to suit for another 12bhp.

    Finally, you have the option of fitting some US M3 cams for another 8ish bhp.

    Doing any more than that is just throwing your money away - but just the above gets you to about 240bhp - the M50 mod being the best because it lets the car use it's higher rev range better.
     
     

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    Quote Originally Posted by mikaveli View Post

    Finally, you have the option of fitting some US M3 cams for another 8ish bhp.
    it is possible put m3 s50b30 (euro) cams in my m50TUB25??or noly US cams i can instal?
     
     

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    Quote Originally Posted by kaarleenc View Post
    it is possible put m3 s50b30 (euro) cams in my m50TUB25??or noly US cams i can instal?
    i think neither the M50 mani, nor the euro spec cams will fit your engine. you'll have to look an aftermarket intake on the internet. same thing about the cams. i guess the only easy mods would be a remap and a CAI.
    There are only two products required to make the universe work properly: Duct tape and WD40. 


    If it moves (and it shouldn't): duct tape. 
If it doesn’t move (and it should): WD40.

    Everything else is just stuff.
     
     

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    Quote Originally Posted by mistreku View Post
    i think neither the M50 mani, nor the euro spec cams will fit your engine. you'll have to look an aftermarket intake on the internet. same thing about the cams. i guess the only easy mods would be a remap and a CAI.
    I wondered about that. I assume it's because the E46 is twin vanos?
    "So give me one more platinum plaque and rap, you can have it back." - Dr Dre

    Spinnin' on digital 22's!
     
     

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    As above, the Manifold/bbtb mod only fits the e36 models. The e46 uses a completely different intake system.

    S50 Euro cams won't fit either.

    A Cai, and remap are your best options
     
     

  10. There is a solution 
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    Quote Originally Posted by alpina527 View Post
    As above, the Manifold/bbtb mod only fits the e36 models. The e46 uses a completely different intake system.

    S50 Euro cams won't fit either.

    A Cai, and remap are your best options
    First, apologies for the three year bump but I'm not sure if this has been answered on here.

    The M50 manifold, as previously mentioned, will not fit on the M52TUB28 (the M52 2.8 litre engine in the E46 and later E38 and E39 models) due to the dual VANOS as it won't clear it. This engine has a different style of engine cover which is the easiest way to differentiate between the two engines.

    M52B28 engine (which WILL accept M50 inlet mani):
    http://aboutbmw.net/uploads/posts/20...55951500_1.jpg

    M52TUB28 engine (which WILL NOT accept M50 inlet mani):
    ImageShack® - Online Photo and Video Hosting

    It's worth noting that, with the M50 manifold, ensure it is from a 325i or 525i. Any other type of M50 manifold, such as the one from the 320i 520i or the M52 inlet manifold from the 323i and 523i will not yield any, or any significant, gains. Also people do include Big Bore Throttle Bodies for a little extra flow. This is a MACHINED OUT 325i or 525i throttle body where the inside has been enlarged. A standard one IS NOT a 'big bore', despite many misconceptions.

    Keep this in mind when shopping.


    So this brings us to the M52TUB28 engine. There IS a solution. And it's not as widely known as the M50 manifold so, if you're sneaky, you can probably get everything you need for around £100 (£60 for the inlet manifold and around £40 for the adaptor plate).

    You fit the M54B25 inlet manifold or the M54B30 inlet manifold, that is the manifold from the later (2001 onwards, check the engine number if you are not sure) 325i or 330i. Note that I have not heard of anyone fitting the M54B30 (330i) inlet manifold to their car successfully, but they say it is possible.

    To attach this M54B25/M54B30 inlet manifold to your car, you will need an adaptor plate located here:
    zroadster.net • View topic - M54 intake manifold to M52TU - ADAPTERS

    There are stories of people having to attach it all together with just two bolts, however people who have done this have successfully run this without issue for years, so it's safe to say that is secure enough. if in doubt, make up some small brackets with nuts, bolts and square washers to hold it all together.

    The gains you make are as follows:
    193bhp -> 213bhp (+20hp gain) 328i
    170bhp -> 190bhp (+20hp gain) 323i

    The torque curve, like on the earlier engines, is shifted up 500RPM so expect to rev a little more. Alternatively get your engine remapped to have a small boost in torque and further boost in power. The maximum power you can economically expect to have out of your M52TUB28 is approx 225bhp and 205bhp from the M52TUB25.

    As always, remove the battery positive terminal for 15+ minutes after performing this mod to reset the DME and engine sensors, your engine will then be reset at default values and will 'map' itself in ways.

    Good luck!
     
     

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    that very good info you should put it in your own thread to get it noticed
     
     

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    Quote Originally Posted by payno View Post
    that very good info you should put it in your own thread to get it noticed
    Cheers. I will do my own thread with a guide including pictures and dyno graphs and possible remap, but I want to perform this mod first. I've only just received my M54 inlet.
     
     

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    Quote Originally Posted by Dragyth View Post
    Cheers. I will do my own thread with a guide including pictures and dyno graphs and possible remap, but I want to perform this mod first. I've only just received
    my M54 inlet.
    If you need I will dyno your car before and after the manifold change on our dyno dynamics rolling road
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