Any real HP or torque increase from K&N drop-in filter?
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From: Lake Stevens, WA
Any real HP or torque increase from K&N drop-in filter?
I just bought a 2005 G35 Sedan (sport, 5AT) and am about to wade into all the basic maintenance items to start everything from a known point. I have the Wix air filters that I ordered along with oil filters, but I've seen the K&N reusable filter mentioned a lot here. Is there any real performance advantage gained from using the K&N filter over standard filters? I'm accustomed to reusable oiled filters from other apps and don't mind spending the money for the K&N if it's worth it, but I don't want to waste the money now if I can just use the two Wix air filters I have and then get the K&N, or whatever might be out later, when the time comes. Thanks for any experience or dyno results you might be able to share.
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Joined: Dec 2003
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From: Marietta, Georgia
Measure the restriction at WOT and 6,000 rpm you will find the difference to be ~~ 1/4 of 1 percent.............less than a single HP.
The natural atmospheric pressure [14.7 psi at sea level] pushes the air into engine thru the intake system very very well................the intake valves and MAF are the major necessary restrictions.
The natural atmospheric pressure [14.7 psi at sea level] pushes the air into engine thru the intake system very very well................the intake valves and MAF are the major necessary restrictions.
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Joined: Dec 2003
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From: Marietta, Georgia
If it flowed better than stock it would give you measurable gains.
The problem is the small 3.5 engine cannot consume much air with only 14.7 psi of input pressure.
Drop in filter marketeers are careful to test on large engines which can consume double or triple the air thus the number of square inches per filter vs engine size is important.
Be scientific and waste an oiled cotton drop in filter by ironing it flat. You will see a thicker oem paper filter is at least 50% larger in area once the convolutions are flattened.
Marketers will lie because they know 97% of car owners are not trained engineers.
Any damage [ring wear] oiled filters create won't show up until 100,000 miles or later so
why worry about what you sell is their mantra.
Not sure what you might save is significant especially considering the other $2500 per year cars cost for mainteance and repairs plus depreciation.
The problem is the small 3.5 engine cannot consume much air with only 14.7 psi of input pressure.
Drop in filter marketeers are careful to test on large engines which can consume double or triple the air thus the number of square inches per filter vs engine size is important.
Be scientific and waste an oiled cotton drop in filter by ironing it flat. You will see a thicker oem paper filter is at least 50% larger in area once the convolutions are flattened.
Marketers will lie because they know 97% of car owners are not trained engineers.
Any damage [ring wear] oiled filters create won't show up until 100,000 miles or later so
why worry about what you sell is their mantra.
Not sure what you might save is significant especially considering the other $2500 per year cars cost for mainteance and repairs plus depreciation.
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