K&N Difference
Race Director
Joined: Feb 2003
Posts: 11,133
Likes: 1
From: ~The DARKSIDE Group~
Dyno was done at 21st Cent, 5 rwhp gain. Pretty good for $60, but here is the story...
At the time I had exhaust mods and a Z06 air box = 375 rwhp, added a K&N = 370 rwhp, dyno tune to adjust air/fuel = 380 rwhp
K&N and other oiled aftermarket filters do prodouce a "groan" like nosie when hitting the throtle that sounds good.
At the time I had exhaust mods and a Z06 air box = 375 rwhp, added a K&N = 370 rwhp, dyno tune to adjust air/fuel = 380 rwhp
K&N and other oiled aftermarket filters do prodouce a "groan" like nosie when hitting the throtle that sounds good.
Safety Car
Joined: Apr 2002
Posts: 4,653
Likes: 6
From: North Royalton, OH
St. Jude Donor '06-'07
It can't be the only change if you want hp. I LOST 3hp adding the K&N to a modded air box with only a cat-back change. Other changes and/or tuning are needed. It is not a hp gainer by itself. 
Le Mans Master
Joined: Aug 2003
Posts: 7,202
Likes: 3
From: somwhere Texas
Originally Posted by BSiegPaint
It can't be the only change if you want hp. I LOST 3hp adding the K&N to a modded air box with only a cat-back change. Other changes and/or tuning are needed. It is not a hp gainer by itself.
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
More air through = more dirt through....
But does K&N let more air through???
If I remember the data correctly,there was a post about a year ago with independent engineering data that showed when new paper outflowed K&N, but when dirty, K&N outflowed paper....
The jury is out, but in the interim, I used Both K&N and Fram Air Hog filters....
But does K&N let more air through???
If I remember the data correctly,there was a post about a year ago with independent engineering data that showed when new paper outflowed K&N, but when dirty, K&N outflowed paper....
The jury is out, but in the interim, I used Both K&N and Fram Air Hog filters....
Race Director
Joined: Sep 2004
Posts: 17,786
Likes: 4
From: Redsox, Pats, Celts & Bruins !!! Redsox Nation !!!
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
Originally Posted by rws.1
More air through = more dirt through....
But does K&N let more air through???
If I remember the data correctly,there was a post about a year ago with independent engineering data that showed when new paper outflowed K&N, but when dirty, K&N outflowed paper....
The jury is out, but in the interim, I used Both K&N and Fram Air Hog filters....
But does K&N let more air through???
If I remember the data correctly,there was a post about a year ago with independent engineering data that showed when new paper outflowed K&N, but when dirty, K&N outflowed paper....
The jury is out, but in the interim, I used Both K&N and Fram Air Hog filters....
Melting Slicks
Joined: Sep 2003
Posts: 2,911
Likes: 1
From: Augusta GA
St. Jude Donor '05-'06
Originally Posted by rws.1
More air through = more dirt through....
But does K&N let more air through???
If I remember the data correctly,there was a post about a year ago with independent engineering data that showed when new paper outflowed K&N, but when dirty, K&N outflowed paper....
The jury is out, but in the interim, I used Both K&N and Fram Air Hog filters....
But does K&N let more air through???
If I remember the data correctly,there was a post about a year ago with independent engineering data that showed when new paper outflowed K&N, but when dirty, K&N outflowed paper....
The jury is out, but in the interim, I used Both K&N and Fram Air Hog filters....
Not by my SOTP but then again it is not calibrated 
IMO it is more for piece of mind. Dave
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Burning Brakes
Joined: Mar 2005
Posts: 1,052
Likes: 1
From: Houston Texas
In my expirience with K&N i have not only seen improved performance but my exhaust has more rumble. This is just my expirience though. I have heard others with different outcomes. I dont know how it would make things worse but I guess anything is possible. I would check with your local performance shop for more info.
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Originally Posted by rws.1
More air through = more dirt through....
But does K&N let more air through???
If I remember the data correctly,there was a post about a year ago with independent engineering data that showed when new paper outflowed K&N, but when dirty, K&N outflowed paper....
The jury is out, but in the interim, I used Both K&N and Fram Air Hog filters....
But does K&N let more air through???
If I remember the data correctly,there was a post about a year ago with independent engineering data that showed when new paper outflowed K&N, but when dirty, K&N outflowed paper....
The jury is out, but in the interim, I used Both K&N and Fram Air Hog filters....
K&N flows 4 times more air than a Delco paper.Why are they on every Indy car and the K&N design (screen oil cloth)
Now made by several companies.Is part of every aftermarket intake
pure bs.
Last edited by 3 Z06ZR1; Oct 11, 2005 at 01:51 PM.
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Originally Posted by BSiegPaint
It can't be the only change if you want hp. I LOST 3hp adding the K&N to a modded air box with only a cat-back change. Other changes and/or tuning are needed. It is not a hp gainer by itself.
Like the catback change the K&N caused nothing as far as hp.loss.
Try a dyno tune to get your hp. K&N with the catback =too lean =power loss. some cars don't adjust as well.
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
I will look to see if I can find a copy of the report. I tried the Forum search engine... It did not find it.
I also have a colleague who used to manage a plant that made paper air filters. He has always said that K&N air flow is no better than paper...
Who and what is one to believe?
I also have a colleague who used to manage a plant that made paper air filters. He has always said that K&N air flow is no better than paper...
Who and what is one to believe?
Safety Car
Joined: Apr 2004
Posts: 3,996
Likes: 77
From: Louisville KY
I have put a K&N in three cars, 87 Buick Grand National, 97 Z-28 Camaro, and my 03 MN6 Vette. I did nothing to the air boxes on the 3 cars. I put in a K&N filter that replaced the orginal paper filter. On all 3 cars, my mpg increased usually 1.5 to almost 3, the time/speed was better on the strip for the Buick and the Camaro, I have not taken the vette to the strip, and yes there is a little more sound at WOT, but I like that. Go to the K&N web site and you can read the write ups. 