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Old 09-07-2004, 02:03 PM   #1
trustWRX
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2009 Scion XB

Default K&N panel filter vs Paper factory Air filter

Any of you guys running these? If so, any difference at all? Spool time, throttle response?

Ive read about the oil getting into the MAF but is that due to normal oiling or over-oiling the filter to begin with?
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Old 09-07-2004, 02:14 PM   #2
Alizarin
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I put one in my 04 about 3 weeks after I first got the car. I noticed a slightly deeper exhaust note and some more low-end grunt off the line. I think overall it was a worthwhile mod. Haven't checked the MAF, but it's about time for the filter's first cleaning so I'll make sure to check it out.

BTW, for those that have them, how often do you clean/reoil it?
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Old 09-07-2004, 04:02 PM   #3
sonicblue
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If you can feel the difference from a K&N, you're in the top 0.00000000001% of auto mechanics! As much as they may claim performance gain, I can't imagine it's tangible. IMO, you buy a K&N because they're economically better deals than paper filters, not because they'll "do" anything that those other filters won't. I've driven 3 cars right after putting in a K&N and heck if I can tell......

Alizarin - it's about time for it's first "real" cleaning? How much do you drive? Shouldn't need to be cleaned until 50K miles! Prior to that, you can just remove it, bang out any big particles and replace.
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Old 09-07-2004, 04:22 PM   #4
REDrum
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After hearing about all MAF isssues w/ K&N I opted for a "Green" brand hi-flow filter (non oil/pleated paper-cloth). I had been running K&N on 3 other vehicles over ~10 years, but not this time. The Green provided notable improvement in both spool up time (~300 rmp less)and smoother pulling from 3000 to 4500rpm in my '04 WRX (5,900k). No other intake mods on the car, only a cat-back exhaust. The filter is very worth wild in my book, it works!!! Who knows or cares about expectancy, its the cost of two fill ups. I only have 1K on it, but, so far its all good.

N
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Old 09-07-2004, 04:33 PM   #5
peterex
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Quote:
Originally Posted by REDrum
After hearing about all MAF isssues w/ K&N I opted for a "Green" brand hi-flow filter (non oil/pleated paper-cloth). I had been running K&N on 3 other vehicles over ~10 years, but not this time. The Green provided notable improvement in both spool up time (~300 rmp less)and smoother pulling from 3000 to 4500rpm in my '04 WRX (5,900k).
300 rpms off your spool time with just an air filter? Did the air filter box also have an uppipe in it?
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Old 09-07-2004, 05:24 PM   #6
hondaeater69
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I agree, you will see no NOTICEABLE difference with a high flow air filter. I think it becomes more important as you increase the horses around it. They've proven it to flow more air, so when you when you start upgrading things and need more air, you need that extra air you get out of a high flow filter. Air filters that are less efficient will become less efficient my magnitudes once you start increasing horse power and the need for more air. Stock I would imagine it really does nothing more but save you a few bucks in the long run.

So, on a stage 4 car, I would say do a test with a highflow and then switch it back to an OEM style, and see if there a restriction there, i would imagine there will be one, however small it will be. I'm sure someone has done this before, no?
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