Questions to anyone using aftermarket engine air filter filter |
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01-11-2015, 11:09 PM | #1 |
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Questions to anyone using aftermarket engine air filter filter
So i dont really feel like spending the money qnd going through the trouble of taking out/storing the oem intake so i was wondering how an aftermaket filter (K&N, AFE, ??) would sound. I do think the car is too quiet and the was mainly interested in sound. I heard cars with an intake and really like the sound. I know an intake is probably more effective but dont really mind. I also know some people are concerned about the oil in the k&n's but honestly i never had a bad experience and i work for the service dept at bmw so i can get away with it should something bad happen (doubt it). Has anyone replaced just the oem filter than can give any impressions?
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01-12-2015, 05:50 AM | #2 | |
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01-12-2015, 08:29 PM | #3 | |
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On an RX-8 forum in 2011, Eric Meyer from an RX-8 World Challenge team echoed that concern: "We ran a K&N style for a few races just because I thought this technology was the best. It made about 1 more hp on the dyno than paper. So we ran it. We also toasted two motors at Daytona and one at Homestead running the Grand-Am Koni Challenge Series. When we pulled these motors apart we found (drum roll) sand blasted rotor housings where the air would enter the intake ports. Switched over to paper, ran both these tracks again and the witness marks were gone. Problem fixed. David also confirmed that he had saw this before also." The speeds involved and location (largely Florida), may have contributed, but still something to consider. |
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01-13-2015, 01:11 PM | #4 | |
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I actually have a K&N filter on my current RX-8 (a well designed Racing Beat intake). I would not view it as a "lifetime" filter. I replaced mine after about 4 years because it was looking thin in spots when held up to the light. I also removed the cold air intake duct that came with it because of the amount of sand and dirt I found in the intake box. That dropped dramatically, though not completely, with removal of the intake. I personally did not find any sand inside the filter. I claim no expertise in the area, but after what I learned & observed with my RX-8 and the K&N, I won't be doing a K&N on my M235i when it comes, but I'm not getting rid of it on my RX-8. I'm leaving the cold air intake off as long as the K&N remains; I have doubts about pumping that much sand directly at a K&N. |
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