K&N filters - how do they do it?

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Old 13 Nov 2004, 05:59 pm   #1 (permalink)
camry-keeper
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Default K&N filters - how do they do it?

How do they get more airflow and still block the same particle size? The
geometry of the filter looks the same as the usual Toyota/Fram. Anyone
have any experience? I would be afraid to let my air filter go for 50,000
miles untouched.



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Old 13 Nov 2004, 06:30 pm   #2 (permalink)
HachiRoku
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Default Re: K&N filters - how do they do it?

On Sat, 13 Nov 2004 18:59:15 -0500, camry-keeper wrote:

> How do they get more airflow and still block the same particle size? The
> geometry of the filter looks the same as the usual Toyota/Fram. Anyone
> have any experience? I would be afraid to let my air filter go for 50,000
> miles untouched.


Um, they don't block the same particle size. They let a lot more of the
smaller particulates through, running on the theory they will burn off...

ANd you can clean it as often as you like. I clean and oil mine once a
year, or 10,000 miles.
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Old 13 Nov 2004, 06:45 pm   #3 (permalink)
camry-keeper
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Default Re: K&N filters - how do they do it?

Do you notice any power increase, or other postives?

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Old 13 Nov 2004, 08:24 pm   #4 (permalink)
Wolfgang
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Default Re: K&N filters - how do they do it?

Previous post by SAE Yota techs say if you over oil they mess up the
$300-400 Mass Air Flow sensor! Its the oil that catches the small
particles. They often tend to create a kind of roar sound under the hood.
I've used in older pre 90 yota but afraid to use on anything newer.

"camry-keeper" <pwichert@nospam.hotmail.com> wrote in message
news:d3d42aa5450905beae511bbdcb97340c@localhost.ta lkaboutautos.com...
> How do they get more airflow and still block the same particle size? The
> geometry of the filter looks the same as the usual Toyota/Fram. Anyone
> have any experience? I would be afraid to let my air filter go for 50,000
> miles untouched.
>
>
>



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Old 13 Nov 2004, 11:14 pm   #5 (permalink)
HachiRoku
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Default Re: K&N filters - how do they do it?

On Sat, 13 Nov 2004 19:45:16 -0500, camry-keeper wrote:

> Do you notice any power increase, or other postives?


Better throttle response (not really more power, but faster response when
I step on the gas) and about 4~5 more MPG (Um, this is on a '95 Tercel...)

It did really increase the throttle response! There is no lag anymore when
stepping on the gas. And, the car was getting 38~40 MPG when I bought it,
after the filter change, it went to 39~45! I think I was averaging 42 MPG
under all conditions, whereas before it was 37/38. It always is in the
back of my mind, however, that I may be letting more contaminants into the
engine, hence, cleaning the filter more often and keeping a fresh coat of
the special oil on it. I was working in an old gas station and one of the
bathrooms wasn't being used, so I would hose it, spray it with the
cleaner, and then swish it around the unused toilet a few times and then
flush with the filter still in the bowl, spray it again, rinse it, dry it
and apply the oil. Fairly effective, really!

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Old 13 Nov 2004, 11:56 pm   #6 (permalink)
MUADIBŪ
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Default Re: K&N filters - how do they do it?

Smoke and Mirrors?.....................

More flow from the same area filter is impossible without sacrificing
the filtration of the smaller bits.

K&N is a money machine in my opinion. they are designed mostly for
performance vehicles, and unless you are doing some serious
performance stuff, not much help.

only my opinion.



Remove "YOURPANTIES" to reply

MUADIBŪ

http://www.angelfire.com/retro/sster...IN%20PAGE.html

one small step for man,.....
One giant leap for attorneys.
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Old 14 Nov 2004, 02:36 am   #7 (permalink)
Viperkiller
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Default Re: K&N filters - how do they do it?

On Sun, 14 Nov 2004 05:56:28 GMT, MUADIBŪ
<SSTERRELL2YOURPANTIES@verizon.net> wrote:

>Smoke and Mirrors?.....................
>
>More flow from the same area filter is impossible without sacrificing
>the filtration of the smaller bits.
>
>K&N is a money machine in my opinion. they are designed mostly for
>performance vehicles, and unless you are doing some serious
>performance stuff, not much help.
>
>only my opinion.
>
>
>
>Remove "YOURPANTIES" to reply
>
>MUADIBŪ
>
>http://www.angelfire.com/retro/sster...IN%20PAGE.html
>
>one small step for man,.....
> One giant leap for attorneys.



You're right. They do allow more air in but also allow more dirt. As
miles wear on, this is actually worse for the engine. As the engine
wears, the power wears. So much for power gains.

As far as any gains, this should be minimal. In order to get any
significant gains, the whole system must be increased...meaning the
intake plenums, heads, headers or downpipe, and the rest of the
exhaust. If the rest of the system is still restrictive, there can't
be significant gains at all. Put it this way: lets say that you have
a 10-foot hose that's 3 inches in diameter, if you increase the first
foot to 5 inches, you still have 9 feet of restriction. The water
coming out of the end would seem to be the same amount as before.
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Old 14 Nov 2004, 10:51 am   #8 (permalink)
Jason James
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Default Re: K&N filters - how do they do it?


"MUADIBŪ" <SSTERRELL2YOURPANTIES@verizon.net> wrote in message
news:vjsdp01itmb6co95es7si74sgceo2hs0er@4ax.com...
> Smoke and Mirrors?.....................
>
> More flow from the same area filter is impossible without sacrificing
> the filtration of the smaller bits.
>
> K&N is a money machine in my opinion. they are designed mostly for
> performance vehicles, and unless you are doing some serious
> performance stuff, not much help.
>
> only my opinion.


I agree. The normal filter ensures adequate filtration and as for throttle
response,..that large intake-plenum chamber ensures throttle response stays
on the slow side. So much for throttle-blipping during double declutching!

Jason


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