2001 E46 325Ci M Sport Induction Kit

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  1. 2001 E46 325Ci M Sport Induction Kit 
    #1
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    muddiefish's Car Details
    Model of Car:
    325ci M Sport
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    2001
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    New member here just wanting to share some info with you all. Just removed a Gen II K&N 57i Induction Kit from my 2001 E46 325ci and fitted the original box back after some good advice from my local main dealer. This kit doesn't direct any cold air from the grills to the cone through the heat shield meaning not enough cold air was getting to it, thus not providing any power gain or mpg improvement. Nieve for buying the kit I hear you say - yes I agree! Was getting 28.5 average over many months with this kit. Now gone up to 30.1 mpg after normal driving for few days. The kit did give a great sound though, so if that's all your after then the kit is fine, if you want the rest of the gains you need some kind of adaptor kit I reckon - too tecnical for me I'm afraid! Hope someone found this useful!
     
     

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    ZXraziel (21-04-2010)

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  4.  
    #2
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    mistreku's Car Details
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    1993
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    do you wanna sell it, by any chance? i would still give it a shot.
     
     

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    Paddy2bsure's Car Details
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    I think you've summed it up nicely - a generic 57i kit will just suck warm air from the engine bay - bear in mind that the air under the bonnet will be heated by the radiator & the exhaust manifold, so won't be cold. There are lots of cold air induction kits available - google Dave F for example. Alternatively Dinan also do a modified airbox which is supposed to be good. Personally I'm running a K&N panel filter in the regular airbox - works for me

    I've done a bit of research on intake air temperatures with my 330i & an OBD2 reader - at standstill the intake temperature can raise to about 30c over ambient temperature - but when you're driving along at say 70mph, it drops down to only a couple of degrees over ambient. If you're sucking air in forom the engine bay, it'll never drop to that level.
    E46 330i Touring (Sold)
     
     

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    muddiefish (23-04-2010),ZXraziel (21-04-2010)

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    #4
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    mistreku's Car Details
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    i'm using the same thing, K&N panel filter, but still think that a Gen II kit could do better with a bit of modifying. they are just a bit too expensive for me right now.
     
     

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    muddiefish (23-04-2010)

  10.  
    #5
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    fatmikey's Car Details
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    im running a K&N induction kit on mine and find its alot more responsive than the original air box, you just need a heat shield to block heat from the engine & as many cold air feeds as possible, Ive got the original air duct from the side of the headlight & the kidneys grills that feed the filter, then ive also used the pipes that came with the K&N to get cold air from below the front bumper up to the filter. These 3 cold air feeds works perfectly for me.
     
     

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    muddiefish (22-04-2010)

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    Quote Originally Posted by fatmikey View Post
    im running a K&N induction kit on mine and find its alot more responsive than the original air box, you just need a heat shield to block heat from the engine & as many cold air feeds as possible, Ive got the original air duct from the side of the headlight & the kidneys grills that feed the filter, then ive also used the pipes that came with the K&N to get cold air from below the front bumper up to the filter. These 3 cold air feeds works perfectly for me.
    i agree. you just need to make sure you can get cold air to it. i ahve just fitteda gen 2 to my car and can see it will need an additional pipe fitted to get the best out of it. cost me about £3 down my local garage plus a couple of cable ties. simples!!
     
     

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    muddiefish (23-04-2010)

  14.  
    #7
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    mistreku's Car Details
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    indeed!
    Attached Images
     
     

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    #8
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    muddiefish's Car Details
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    Probably going to put the kit on ebay, the kit has only sucked around 15000 miles worth of air through it and is still pretty clean. Car is running so much smoother without it now, its much more responsive at higher end speeds too now, doesn's sound like its gasping all the time. Appreciate all the advice everyone has given about how I could improve the kit but don't have the time really and I'm one of those that wants to keep the car as original as poss without lots of extra pipes.
     
     

  16.  
    #9
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    muddiefish's Car Details
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    325ci M Sport
    Year of Manufacture:
    2001
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    Cheers for the advice but gonna leave the original box in I think. The kit did have a heat sheild but even though I fitted it spot on it didn't keep anywhere near enough heat away from the cone. The kit only came with the pipe that connects to the cone to the MAF and then onto the engine so there was nothing specifically in the kit to direct the air from the Kidney Grills to the cone which is a bit disappointing really considering this kit is the correct one for my car, I even checked with K&N. Not worth the money if you have to buy extra's to make it work to its full potential.
     
     

  17.  
    #10
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    muddiefish's Car Details
    Model of Car:
    325ci M Sport
    Year of Manufacture:
    2001
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    That all sounds very technical! Thanks for the advice though. You say your running a K&N panel filter. Do you notice much of a change to performance/responsiveness/mpg or do you just save the cash by not having to change the filter ever?
     
     

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