Author Topic: Cone air filter  (Read 2621 times)

didgeridoodude

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Cone air filter
« on: January 21, 2012, 07:53:37 PM »
I have a 1991 E30 318is and I'm not quite sure how to put on my cone air filter. I presume I need a conversion kit because of the location of the sensors. Any ideas? Thanks!
« Last Edit: January 22, 2012, 03:21:23 AM by didgeridoodude »

Geoff

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sensors?
« Reply #1 on: January 22, 2012, 06:50:13 AM »
the cone filter does not interact with any sensors, afaik.  the part that actually bolts to the stock air-box, is square, and bolts to the airbox with 4 bolts.  You need an adapter that bolts to the MAF unit, but has a round outlet rather than a square one.  then the cone just goes onto the adapter's round outlet and is held on with a hose clamp.  Be aware that a cone filter sitting there in your engine compartment is sucking in hot air, and may not even be an improvement over stock.  2 possible courses of action, that do have a positive result,  you could buy or fab a sealed enclosure for the filter, then run a duct to a fresh air source under the bumper, behind the grill, etc.  or you could keep the stock box,  put a k&n performance filter in it, then run a duct (if your car does not have one) to the fresh air.  I got one of the headlight panels that has a  hole in it,  and ran mine to there.  I am not sure why some cars have this and some dont..my  91 318is does not have this panel, but my friends 92 e-30 convertible does.  either way its an easy mod.  I may even have an extra headlight panel if you need it
                                                       Geoff

didgeridoodude

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Cine air filter
« Reply #2 on: January 22, 2012, 04:27:58 PM »
I already have the headlight panel, a sort of stock cold air intake. A friend of mine was giving me his extra cone filter for free so I was tempted to use that one but maybe I'll just do a DIY intake.

Geoff

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Cine air filter
« Reply #3 on: January 23, 2012, 04:45:03 AM »
It would probably be so close that only a dyno would know for sure,  but I dont believe a cone sucking hot air would be an improvement over the stock air box breating cold air..and it will be louder for sure
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didgeridoodude

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Cine air filter
« Reply #4 on: January 23, 2012, 10:35:08 PM »
Thats my thoughts as well, if I end up putting one on, I'd much rather have it hanging around a cold spot then sulking by the radiator and engine.