K&N FIPK Air Filter for E46 330CI Product Review

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  1. K&N FIPK Air Filter for E46 330CI Product Review 
    #1
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    JonW's Car Details
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    Hi Guys

    I've just fitted a K&N FIPK air filter to my E46 330CI and I'd like to share my thoughts on this product.

    The reason I decided to get an aftermarket cone filter was for the reported extra induction noise. If there was going to be any performance gains, that would be a bonus. Out of curiosity, using an AP22 performance meter, I measured the car's BHP via its acceleration before and straight after the filter fitment.

    THE KIT:

    The filter kit is a K&N FIPK model no. 57-1001 and cost me £222 inc. postage from an ebay trader. K&N claim that it gives an extra 11bhp and 10 ft lbs of torque throughout the rev range. The kit is very comprehensive, includes a heat shield, is well made and comes with clear instructions that make fitting it an absolute pleasure. It took me about 1.5 hours to fit at a very leisurely pace.

    Details here:

    http://www.knfilters.com/search/prod...x?Prod=57-1001


    RESULTS:

    Noise:

    A subtle increase in induction noise is noticeable from half throttle upwards. It's a pleasurable kind of sound that greatly improves my enjoyment of the car.

    Drivability:

    The car feels more responsive and seems to rev more easily. For example, if I'm driving fast, I'll change up at 6000RPM instead of 5800RPM.

    The harsh truth:

    The performance meter recorded a 5 BHP reduction in power throughout most of the rev range after fitment of the filter. During the fitting, I had unplugged the battery. This had probably reset the ecu and so I drove the car for a couple of weeks to allow it to re-teach itself. When conditions were similar i.e. air temp, fuel load etc, I repeated the acceleration test for a third time. The result was that the power had improved over the previous run and was now identical (within 1 or 2 bhp) to that of the car with the original filter.


    SUMMARY:

    No power gain or loss with new filter.

    Better sound.


    CONCLUSION:

    Well, I hope this is of some interest to anyone considering buying an aftermarket filter. Perhaps the std airbox is a particularly good design which can supply more that enough air to the engine. Or, does the ECU adjust to provide less emissions from a more efficient intake design and therefore give no net gain in power? I've no idea and would like to know if an ECU upgrade would be able to take advantage of a better intake design (assuming that something like a K&N is a better design). It's interesting to note the incorrectly perceived extra power owing to the new filter's noise. If I'd known all of this before buying it, I'd still have bought one because of the sound. Regarding insurance, it's cost me about an extra £30 to have it as a notified mod.

    Best wishes

    Jon
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  2. The Following 4 Users Say Thank You to JonW For This Useful Post:

    328mark (08-04-2011),pangster (07-04-2011),sammyb (31-03-2014),vampalan (16-05-2011)

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    #2
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    Excellent and comprehensive post John!!

    There is very little gain to be had on the induction side of things (unless running FI).. The stock intake is not a bottle neck on these engines for 90% of applications..

    * 2016 BMW M135i LCI (F20): current
    * 2016 Mercedes Benz GLA 200d AMG Line (X156): current
     
     

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    MAF eaters

    Good review all the same.
     
     

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    So many companies claim that their products can give you an extra 10hp or so with just a few bolt on bits, is there anything that really can? Can I really get my stock E46 328 over the 'magical' 200hp? I don't want to spend thousands on upgrades, but I'd spend a few hundred quid if I could bump my car's performance up a little. Is this realistic at all?
     
     

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    Quote Originally Posted by Tungtvann View Post
    So many companies claim that their products can give you an extra 10hp or so with just a few bolt on bits, is there anything that really can? Can I really get my stock E46 328 over the 'magical' 200hp? I don't want to spend thousands on upgrades, but I'd spend a few hundred quid if I could bump my car's performance up a little. Is this realistic at all?
    remapping is the proper way to get extra power and better drivability.

    All the stick on bits on the market make naff all difference.
     
     

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    I was thinking of a remap, not particularly for extra power as I understand that it's only really with the diesels you'll get big gains, but even just for a better throttle response.
     
     

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    Quote Originally Posted by Tungtvann View Post
    Can I really get my stock E46 328 over the 'magical' 200hp?
    M54 330i Intake manifold & throttle body adapter - assuming your 328i is an M52TU (with double vanos). You can't use the 330i TB as it's fly-by-wire, the 328i is cable. Anyhow, look for an inlet manifold with the DISA still intact, as it's bigger on the 330i (one less bit to buy).
    After that, remap it. 200+ bhp done

    The conversion has been well documented online...
    http://www.e46fanatics.com/forum/sho...d.php?t=710600
    E46 330i Touring (Sold)
     
     

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    Quote Originally Posted by Tungtvann View Post
    Can I really get my stock E46 328 over the 'magical' 200hp? I don't want to spend thousands on upgrades, but I'd spend a few hundred quid if I could bump my car's performance up a little. Is this realistic at all?
    Can always cheat and use good ole laughing gas. The laughing stops when the bottle is empty though...plus the cost adds up when having to get the bottle filled
    I'm not a complete idiot...some of my parts are missing.
     
     

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    #9
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    Thanks for the comments guys. I might have it remapped in a few months. I'll do a "before and after" test with the AP22 to see if there's a power difference as well as a difference in drivability and I'll obviously let you know how I get on.

    Cheers

    Jon
     
     

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    Nice review, was thinking of doing something similar to my car, or a panel replacement filter jobbie.
     
     

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