K&N air filter

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e30ata
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Mon Aug 09, 2010 1:05 pm

are the cone filters worth putting on, also does the MPG get affected.
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Alex
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Mon Aug 09, 2010 1:08 pm

Complete waste Ata, suck hot air in, create flatspots and your engine becomes less responsive.

MPG will probably be worse i would imagine???

BMW airbox is the best, it has been proven too :D
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aj_mckay
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Mon Aug 09, 2010 1:09 pm

Some say yes, some say no so from that I'd deduce that it'll be pretty negligible difference if any so in my opinion not worth it. No idea about the MPG but putting anything other than OE stuff on a car runs the risk of impacting the way it was designed to work...
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e30ata
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Mon Aug 09, 2010 1:13 pm

That's that sorted ,back on the shelf :D
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Topblag
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Mon Aug 09, 2010 1:23 pm

I've seen a wee difference since I added a K&N panel filter to the cabby. I'd recommend that.
1990 325i Cab auto in Alpine White II
1988 Alpina C2.5 moredoor in Black, 71k
1990 325ix, moredoor auto in Laser Blue. 51k
1984 Hartge H35 in Black
2004 996 C4S in Silver 43k manual
2006 Audi S6 V10 in Black 58k
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Darragh
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Mon Aug 09, 2010 2:05 pm

me too! id recommend useing a k+n panel filter. that way you stick to a stock air box with cold air feed.
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Alex
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Mon Aug 09, 2010 2:07 pm

i had a pipercross panel filter, it did absolutly nothing so i sold it and got £20 for it :D

Brianmoore recons the panel filters dont filter properly and let crap get into the engine? not sure how true this is but he is rarely wrong :D
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Darragh
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Mon Aug 09, 2010 2:48 pm

the panel filters are good as long as they are oiled properly and cleaned out from time to time.
i have used k+N panel filters on all of my road cars so far and have never experienced any problems.
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silversideofthemoon
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Mon Aug 09, 2010 5:07 pm

ad recommend it to ata, i had them on my range rover and 2 other cars saw an improvement as for fuel economy was unsure with rising fuel costs all time couldnt bother workin it out cant be that bad tho can it :mad:
formally touringandy.............driving e30 320i touring and e39 535i
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e30-EVN
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Wed Aug 11, 2010 5:50 pm

panel filter yes....... cone filter definate no!! waste of atleast 10lb ft,, this was in the tunning guide in performance bmw mag few months back, stick to tha bmw airbox because as soon as you loose the trumpet in there thats bye bye torques!!
A 2 door e30 with 8 cylinders, what could be better winkeye :D
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andrew_baran
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Wed Aug 11, 2010 8:27 pm

I'm swapping my K&N cone for a panel as soon as I find the fittings for my airbox again! The power band on my 320 is shocking - nothing up to 3.5k, everything from 3.5-5k, then nothing again! Was much smoother with the standard panel in.

But the noise is pretty lush...
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