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Old 06-01-2003, 10:28 PM   #1
Dr Ken
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SilvAr

Default airfilter = power loss

While the K&N was drying from its semi-annual clean , I went for an experimental drive sans-filter (empty stock box w/Ganzflow). I gotta say, its like an extra 5HP! I must be over-oiling that filter panel or something, because when I put the cleaned K&N back, there was a noticible loss 3-4HP. Gonna clean it again, then spray on tiny amount of oil. Anyone else had similar experience ?

I wonder if it is at the filter that Cobb takes the advantage.

-Ken
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Old 06-02-2003, 12:54 AM   #2
atmosphere
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Its not really good to run open air box, lets more dirt into your engine. And of course there will be a hp+ cause no filter is less restrictive than having one in.
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Old 06-02-2003, 02:10 AM   #3
nySulli
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any filter will restrict your airflow, costing you power, the cobb gets its gains from having a wider, smoother insides, that doesn't have gaps at the joints that do nothing but suck in warm air

the cobb just allows for better velocity and less turbulance
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Old 06-02-2003, 11:56 AM   #4
Dr Ken
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Sorry, I read my question and realize I wasn't clear.
What I wanted to know is if anyone had noticed excessive resistence by over-oiling their low resistence filter panel. How much oil is enough? Thanks.
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Old 06-02-2003, 06:45 PM   #5
Poppa smurf
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Lightly coated, not soaked I would assume just enought to catch the dust.
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Old 06-04-2003, 01:47 AM   #6
jeddy
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Any air filter is going to cause resistance. From the look of my K&N, if you do over-oil it, that excess oil will drip off eventually and be burned by the engine anyway. If you don't put enough oil on, the filter doesn't work as well, which could cause problems down the line. I put just enough to give it a red tinge, let it dry, then touch up any white spots (per the directions on the filter oil).

Try comparing the K&N to the stock paper filter. With my car, there's a bigger difference there than K&N vs no filter. ;]
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Old 06-04-2003, 03:03 AM   #7
makofoto
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Vishnu says do not use K&N oiled filters ... oil will get on your Air Flow Mass meter ... and screw up your air intake readings. They insist you should stay with the stock air filter ... but remove the snorkel.

If you have been using a too heavily oiled K&N air filter ... you need to pull the air flow meter ... Denso part right after the air box ... and clean it. Some say put it in a plastic bag with non-chlorinated brake cleaner spray and shake it ... others say just use rubbing alcohol.
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Old 06-04-2003, 07:13 AM   #8
joefocker20
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Well, he had a 00 which is MAP based, not MAF based.
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Old 06-04-2003, 11:32 AM   #9
remarcable
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The only major problem with cutting off the snorkus and using the paper filter is that I have had small pebbles and debris penetrate the stock air filter.

Never had anything go through my amsoil filter, which has a steel screen in the back of it.
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Old 06-05-2003, 02:56 AM   #10
BAN SUVS
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Quote:
Originally posted by remarcable
The only major problem with cutting off the snorkus and using the paper filter is that I have had small pebbles and debris penetrate the stock air filter.

Never had anything go through my amsoil filter, which has a steel screen in the back of it.
K&Ns use steel mesh to hold the cotton fiber together. Lightly oil them, like if you were spray painting paper. Properly used K&Ns flow very well, and won't discharge much onto your MAF (for those of you with 98-99 RSs).
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Old 06-05-2003, 11:10 AM   #11
rilles
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Good site for air-flow test that doesn't seem like an Amsoil commercial,

http://www.bolhuijo.com/airflowtest/

Also, bobistheoilguy web site has an air-filter section, lots of interesting info there.

I've also had K&N in various cars with mass-airflow sensors for 10+ years and didn't have any sensor related problems.

Far as Amsoil filtering better? http://www.mcagraphix.com/filter/test.htm

Last edited by rilles; 06-05-2003 at 11:17 AM.
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Old 06-05-2003, 06:18 PM   #12
legacychop
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i want to know, not to be mean is how did you manage to notice 3-4 hp? you cant feel it.
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Old 06-05-2003, 11:01 PM   #13
Dr Ken
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4 HP is what a ProECM has shown to provide on its own dyno testing. The difference, I thought, was about equal. By the way, those are great sites.
-Ken
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