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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive Thru April 04, 2008 » K and N filter worth the cash? « Previous Next »

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Rwcfrank
Posted on Thursday, April 03, 2008 - 12:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Anyone install an aftermarket air filter notice any difference other than the weight reduction from the wallet?
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Bigkuri
Posted on Thursday, April 03, 2008 - 12:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It sounds different on idle <gasp>
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Hoon
Posted on Thursday, April 03, 2008 - 01:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

K&N.
It should last forever 'cos you can remove it and wash it.

As Bigkuri says it sounds different at tickover and accelerating at lower speeds (can't hear it after that due to wind and exhaust.).

Edit: Meant to say that you'd need to run it on a dyno before and after fitting it to tell much difference performance wise-could be worth a little bit.

(Message edited by hoon on April 03, 2008)
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Rwcfrank
Posted on Thursday, April 03, 2008 - 09:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks guys, sounds like most K N replacements, look good and sound good...
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Paul56
Posted on Thursday, April 03, 2008 - 11:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Not to pick on K&N or any other aftermarket washables, but there was a thread about air filter efficiency on this or another site that was pretty in-depth and revealing. The test is done by weighing a clean filter then passing a large volume of air through it with a measured amount of fine dirt while tracking restriction across the filter. Afterward the filter is re-weighed. Obviously the heaviest filter trapped the most dirt. As I recall stock type paper elements were the most efficient at trapping dirt. They didn't always flow the most air, but high flow usually allowed more dirt ingestion. Cylinders, rings, pistons and oil HATE dirty air.
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Eengler2
Posted on Thursday, April 03, 2008 - 11:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Cylinders, rings, pistons and oil HATE dirty air.

But they like air: ) The more the better, if you add fuel. I ran a K&N on my twin turbo 3000gt for 130k mi, no problems.

Keep it clean. Wash and oil to specs and you will be fine.* How many million have they sold?

*at your own risk: )
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Michael1
Posted on Friday, April 04, 2008 - 08:53 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I never really cared for K&N's until I started to run one on my Uly. They do get dirty, but you can clean them. At 10k miles my stock air filter was almost plugged all the way through. With the K&N now, I can clean and reoil it every 5k miles... I don't think I would want to be spending the money on a sock filter every 5k miles....

Advantage K&N....
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