Cold vs Normal sport air intake?

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  1. Cold vs Normal sport air intake? 
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    So i've been considering getting a new air intake, maybe throw on a new exhaust, and give my bmw 325xi a new chip.
    all that aside this question is more for the air intake.
    other than keeping your engine cooler, what else does the cold air intake do over a normal sport intake?
    would anyone also reccomend any specific intakes? links are appreciated.
    -thanks guys!
     
     

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    cold air is more dense than "normal" air. therefore it has the ability to burn more fuel. more fuel = more power.
    this is the reason for Intercoolers.
    you may have noticed your car has more power on a frosty morning? its also how these £0.99 chips on e-bay work, they kid the ECU into thinking its about -18ºC outside and the car then puts more fuel in.
     
     

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    So if what you say is true techinically there would be no need for a new chip?
     
     

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    Quote Originally Posted by neiljewell View Post
    its also how these £0.99 chips on e-bay work, they kid the ECU into thinking its about -18ºC outside and the car then puts more fuel in.
    No it is not

    If your inlet air temp sensor was tricked into seeing colder conditions it will give you more fuel. More fuel then is needed. Rich mixtures will not give you more power.

    What a chip will do is add ignition timing. As much as the chip manufacturer believes is safe for an average engine. They might also add a small amount of fuel to the fuel map

    A cold air intake is normally a box with a filter in it that keeps the hot engine bay temps out. Your car should have one of these standard. Some use a less restrictive filter. You can also get one of these for your current box. I personally don't believe an aftermarket cai will make any noticable power.

    Some nice headers would be good but i've got a feeling that ix models are even more limited on space

    Remap from one of the forum sponsors
     
     

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    I used stick on insulating material from Zircotec on standard air box. It appears to have made the car more responsive.
     
     

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    A lot of CAI's don't work due to poor insualting materials. If you can get one with a good heatshield it will give a little more power and better throttle response. AFE ones look like they are designed well as do Active Autowerks kits. Being in the States you should be able to get these easily.

    Or, you can get a good panel filter and add another airfeed to your existing airbox that collects are from near the bumper region. If you do this make sure you make a hole before the filter and not after. I have not seen the intake box and feed for your model but you may be abe to incorporate another airfeed pipe into the existing airfeed/scoop.
     
     

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    e46xi (04-11-2011)

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    Quote Originally Posted by neiljewell View Post
    cold air is more dense than "normal" air. therefore it has the ability to burn more fuel.
    It's also largely to do with the fact the air/fuel mix ignites easier and more thoroughly.
    Last edited by rich@vrdevelopments; 05-11-2011 at 17:30.

    www.VisionRacingDevelopments.co.uk
     
     

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    Quote Originally Posted by neiljewell View Post
    cold air is more dense than "normal" air. therefore it has the ability to burn more fuel. more fuel = more power.
    this is the reason for Intercoolers.
    you may have noticed your car has more power on a frosty morning? its also how these £0.99 chips on e-bay work, they kid the ECU into thinking its about -18ºC outside and the car then puts more fuel in.
    that's the biggest crap I've ever read on this forum.
     
     

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    Quote Originally Posted by Trung View Post
    that's the biggest crap I've ever read on this forum.
    i dont kno, but i wouldnt say it is all crap!!! i mean, that is how intercoolers work- they cool air going into the engine. as stated above, the colder air is more dense in the same volume which means that there is more oxygen in it to support the combustion of the fuel in the engine.

    as stated before...results in more power!!!
     
     

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    Intercooler for NA engines?
    Great, gonna fit one on my car next week along with those eBay chips.
     
     

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    rich@vrdevelopments (19-11-2011)

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