1999 E46 328ci remap?

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  1. 1999 E46 328ci remap? 
    #1
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    T328bak's Car Details
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    Hi guys i read online my car pushes out 193 bhp, but just wanted to know if anyone got theres remapped and how much extra torque n bhp built up and whether it is really worth it.
     
     

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    You could get an extra 15-ish+ Bhp, and 20Nm of torque.
    Being a 2.8 litre, it's not giving it's all as it is, but you'll have the M52TU engine (which has double vanos) rather than the earlier M52 single vanos that had the nice easy M50 manifold swap.

    You do have the option of fitting an intake manifold from a 330i with a couple of custom bits to link everything together, and then you should see more like 230+ bhp in total.

    Fuel economy won't change from it's current "style", ie if you drive it gently, it'll carry on making the same MPGs, maybe a very slight increase if you are lucky.
    If you drive it harder all the time and don't have great MPGs, then it might get a little worse.

    It's the same as original I guess, choose power or economy when driving, and it'll give you one or the other.

    The main bit would be throttle response. It will feel sharper and more eager, which is something you'll always get and that's what you'll mainly be using.

    Increases in only the peak power wouldn't be much use if you rarely got enough clear road to stretch it's legs!
     
     

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    Is that a big job to do the swap? With the 2000 328, do I also have the M52TU engine? Most importantly, what does it cost?
     
     

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    i would have thought you should get around 8bhp from the remap with the improvement being response mainly!, the manifold swap seems to be a bit of a grey area, not many people do it as its not like the mu52 lump that gave big gains!, the 330 has flyby wire so not only is the adaption plate needed but there is a little bit of changing things about to fit the wire throttle set up of the 2.8. the odd person that has done this said they think they can feel a difference but untested on a rolling road, hense no real posts about about it!
    i would say in real world terms you will not have a new engine, and you will be down a few ponnys, so if nothing else you may get factory power again with better drivability!, or if your lucky a few extra hp. maybe.
     
     

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    I don't know much about the actual mechanics of car engines, but for an engine that is only 200cc larger, how does the 330 have so much more horsepower? It doesn't seem proportionate for the engine size difference? Is it something holding the 328 back, or the 330 with something improved?
     
     

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    ther 330 is a complete different engine from build and design, alot more modern, the comparison is between the 325 and 330, 500 cc more for extra 30bhp.
     
     

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    I think you just need the 330i intake manifold and the adaptor plate.
    The throttle body bolt holes are in a sightly different position so the plate turns the throttle by a few degrees.

    The 328 has the kind of power you'd expect from a 2.5, so that's why a tuned 328 can have more power than a stock 330i.

    The 330i swap isn't as common though, and not as popular.
     
     

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    Quote Originally Posted by TheEnd View Post
    I think you just need the 330i intake manifold and the adaptor plate.
    The throttle body bolt holes are in a sightly different position so the plate turns the throttle by a few degrees.

    The 328 has the kind of power you'd expect from a 2.5, so that's why a tuned 328 can have more power than a stock 330i.

    The 330i swap isn't as common though, and not as popular.
    it seems to be the torque thats more with the 2.8, and with the design of the 2.8 inlet its delivered lower down the rev range where as the 2.5 needs to be reved to get that power really sing!
     
     

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    Yep, that's the current style, you get the low torque of a 2.8 to 3000+rpms, with even an extra boost from the thin runners.

    Brake horsepower is a good approximation of engine performance on a regular engine, but the 2.8s should have been making 215+ in regular BMW trim.

    M50 2.0 - 150bhp - 75bhp/litre
    M50 2.5 - 192bhp - 77bhp/litre

    M52 2.0 - 150bhp - 75bhp/litre
    M52 2.5 - 170bhp - 68bhp/litre
    M52 2.8 - 193bhp - 69bhp/litre

    M54 2.2 - 170bhp - 77bhp/litre
    M54 2.5 - 192bhp - 77bhp/litre
    M54 3.0 - 231bhp - 77bhp/litre

    You can see the artificial capping of the power, which makes it seem like a more torquey engine when people compare it with experiences of similar output engines.
     
     

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    i have a 328ci and would like to put the 330 manifold on, mine is a fly by wire throttle would i still need adaptor plates? for the actual mounting of it? damn near brought an m50 manifold.....phew! going for a remap soon and decat exhaust with induction kit. is there anything else i can do like injector wise??
     
     

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