2000 E46 328Ci Auto - Any chance of a few more ponies before a remap?

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  1. 2000 E46 328Ci Auto - Any chance of a few more ponies before a remap? 
    #1
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    jtsystems's Car Details
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    I keep looking to find tuning stats on this engine and honestly I struggle to find anything at all?

    Are they really that well engineered they are maxing the output of these lumps without turbo/ss?

    It just seems a very low BHP (190) from such a large engine.

    Now I am not looking for a 300BHP monster but pushing 230/240 would be a god send.

    I believe the only way to add a few ponies is simply remap, any one else got any idea's that don't involve taking the entire engine apart?

    Strange, but what about adding NOS? not for a quick boost but a drip feed system, engines seem pretty strong any ideas how this would perform?
    Last edited by mark@vorny.co.uk; 17-01-2011 at 23:31.
     
     

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    What you can do is fit the 330i intake manifold, similar to the M50 manifold swap on an e36 328, but you will need an adaptor plate to pair them up.
    A remap just by itself would give about 11-12bhp as they are limited by the air they can get in.
     
     

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    Would swapping the intake manifold make much difference read various pro do it and "nah it won't change anything"

    Any real world figures available?
     
     

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    I haven't seen figures as yet, but it should make a massive difference.
    Unrestricted, your engine would put out 235-240-ish BHP if it was made purely for power.

    The intake manifold is one restriction, providing a supercharging effect at low engine speeds to aid torque and driveability.
    This has been BMWs strategy for quite a while now, often using larger engines with limited bhp so you can still have the full torque of the larger engine at low speeds, but fitting into a slot against competitors with similar bhps but less torque.
    That's also why they'll use "316" on a car with a 1.9 litre engine for example.

    Hopefully we'll either have someone on here who has done the manifold swap and can give first hand experience, or links to the cold hard facts about it.
     
     

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    That would be really advantageous as would be really interested to see.

    I know these engines deliver amazingly smooth power I'm just hoping to squeeze a few more ponies without disturbing too much of its original charm hence no super charger etc... of course funds too but seems pointless spending 5k on a car when you could buy an M3...

    Will have to consider a mapping done, best options available?
     
     

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    #6
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    A remap can be done before or after, 11-12bhp increases on a standard engine, with the intake manifold, I'd expect probably about 7-8bhp extra.

    Power gains can be first come, first served, so whatever mod gets done first will claim some of the easier to get to horses. The more you add, the closer to the physical limits of the engine are.
    Post manifold, it can help regain slight torque losses from the removal of the thinner intake runners.

    Thinner runners increase the gas speed providing a momentum effect and cramming more air in than usual. At low speeds, they are under capacity and don't cause any restrictions. As the rpms increase, it starts getting tighter, and the peak BHP starts to take a hammering.

    The larger manifolds will remove that top end restriction giving you better top line figures on paper, but some of the low speed torque will be removed.
    Some people notice it and miss it, others haven't reported it at all, as it can get mixed in with the change in engine character.

    There is no need for specific remaps for with or without the manifold. Any changes are done via the "absolute" airmass as reported by the MAF.
    If you get more air in from a better intake, it still all passes through the same MAF and gets measured just the same.
    The ECU will just use a figure for a higher corresponding airflow signal at the current RPM.
    It will however make a RPM/rev limiter increase slightly more beneficial, although usually the peak power has been passed before the car hits the limiter.
    With the standard manifold, it can just be carrying on into more strangled airflows, post manifold swap will make those extra revs more useable although power will still be dropping of (just now not as quick)
     
     

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    http://www.bimmerforums.co.uk/forum/...086/page2.html

    jmafitzy, post 13 for some more manifold swap info.
     
     

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