Why Not K&N? - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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post #1 of 12 Old 02-08-2011, 05:20 PM Thread Starter
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Why Not K&N?

Why doesn't anyone use K&N ?

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post #2 of 12 Old 02-08-2011, 05:23 PM
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it dosn't filter well and allows dirt into the engine and "dusts" the turbo. shortening it life.

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post #3 of 12 Old 02-08-2011, 05:27 PM
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yep, engine/turbo dusting, poor filtration in dirty/dusty conditions

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post #4 of 12 Old 02-08-2011, 05:30 PM Thread Starter
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Really, I've ran them on my turbo charged street/race bike for years with no problems. It's a good rumor for the competition to spread though, is there any evidence or proof from testing?
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post #5 of 12 Old 02-08-2011, 05:37 PM
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My boss had a k&n on his truck since new and I took the intake off with 70k miles on it and the compressor wheel in the turbo is trashed. I have a napa filter on my truck and mine looks fine with 263k miles. both trucks are 99 7.3L

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post #6 of 12 Old 02-09-2011, 05:16 AM
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I took my OEM filter off after 5000 miles and put a K&N on it. After 55000 miles I took the K&N filter out and it wasn't as dirty as the OEM after 5000 miles. I didn't change the climates I drove in so that tells me it wasn't catching any dirt. No more K&N for me!

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post #7 of 12 Old 02-09-2011, 10:09 AM Thread Starter
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Thanks for the replies

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post #8 of 12 Old 02-09-2011, 01:37 PM
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Quote:
Originally Posted by tricktom1 View Post
Really, I've ran them on my street/race bike for years with no problems. It's a good rumor for the competition to spread though, is there any evidence or proof from testing?
Thanks,
Tricktom1, I used to run them for years on my racebikes as well. (unitl I switched to BCM filters.) Anyways, based on some of the reading that I have done on the diesel sites, here is some additional detail. From what I gather, the K&N only has a couple of layers, or plys of the cotton gauze. The brands that everybody likes (S&B, AFE) have like 8 layers of the gauze. I can't verify any of this, it is just what I read in some of the other posts.

BTW, are you close to Dallas?
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post #9 of 12 Old 02-09-2011, 04:46 PM Thread Starter
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post #10 of 12 Old 02-10-2011, 10:46 AM
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Motor cycles are not turbo diesels...all washable filters IMO shouldn't be used..
I'd either use a stock filter or a dry aftermarket one.
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