- Joined
- Aug 30, 2002
- Messages
- 20
Just curious if any of you guys have replaced their original manufactured air filter with the K&N air filter. Did you see any benefits from it?
-
The BladeForums.com 2024 Traditional Knife is ready to order! See this thread for details: https://www.bladeforums.com/threads/bladeforums-2024-traditional-knife.2003187/
Price is$300$250 ea (shipped within CONUS). If you live outside the US, I will contact you after your order for extra shipping charges.
Order here: https://www.bladeforums.com/help/2024-traditional/ - Order as many as you like, we have plenty.
K&N Air Filter
- Thread starter meat cutter
- Start date
- Joined
- Oct 2, 2001
- Messages
- 426
I'm assuming we're talking cars here? 
Yes, K&N Filters work well. In a real-world situation they're good for 5-15 HP usually, which probably isn't enough to "feel" but that, combined with improved exhaust flow and you might see something. Totally depends though.
I run them in my blown big block. Here's some pictures for the Chevy Gearheads
Jeff's blown Chevelle
Yes, K&N Filters work well. In a real-world situation they're good for 5-15 HP usually, which probably isn't enough to "feel" but that, combined with improved exhaust flow and you might see something. Totally depends though.
I run them in my blown big block. Here's some pictures for the Chevy Gearheads
Jeff's blown Chevelle
I've got the Amsoil filter which is the foam version of the K&N paper type filter. The Amsoil requires less maintainence than the K&N.
The only way to get the full benefits out of the filter is to improve the "breathing" system from front to end. That means improving the air intake system, relieving the filter bottle neck (as much as you can), and increasing the amount of exhaust coming out. If it is normally aspirated engine, and you upgrade the entire air pathway you should see about 10-15hp at the engine and about 5-10 at the wheels, depending on the car.
With the filter alone, you can hear the engine a bit more, get about 5hp at the crank, and about 2-3 at the wheel, in other words, not much.
The only way to get the full benefits out of the filter is to improve the "breathing" system from front to end. That means improving the air intake system, relieving the filter bottle neck (as much as you can), and increasing the amount of exhaust coming out. If it is normally aspirated engine, and you upgrade the entire air pathway you should see about 10-15hp at the engine and about 5-10 at the wheels, depending on the car.
With the filter alone, you can hear the engine a bit more, get about 5hp at the crank, and about 2-3 at the wheel, in other words, not much.
some air boxes are more restrictive than others. older 5.0 mustangs have a really restrictive box, while corvettes dont have as much stuff to reduce intake noise. i cut off the top of the box(louvres) on my '96 vette, put in a KN, and it runs better, a little. lots more air intake noise though, not objectionable though, to me anyway. vette exhaust systems arent so bad stock either, i removed the resonator (the long 2 inlet/2 outlet muffler under the car) and it made a big diff, it already had 3" pipes and dual cats from the factory. with just these mods the car has run a 13.67 at 112 (close to this, not exact , would have to look) in the 1/4, in 100+ degree weather, not too bad for pretty much stock, imho. i wanna run it in cooler weather, prob pick up a tenth or so anyway. but KN's are good, as are the accel and barry grant filters.
greg
greg
- Joined
- Nov 17, 1998
- Messages
- 3,296
I plan on putting in a K&N filter when I upgrade(and fix the crash damage...) my stock ZX-12R exhaust to an Akrapovic or Muzzy system.
- Joined
- Jul 27, 2000
- Messages
- 465
It really depends on the car, especially naturally aspirated vs turbo charged.
For the Subaru Impreza WRX, the benefits of a K&N are questionable. Some say it allows too many particles through compared to stock, and can damage the MAF sensor.
One Subaru tuner actually measured a 3 hp loss on the dyno with the K&N.
For the Subaru Impreza WRX, the benefits of a K&N are questionable. Some say it allows too many particles through compared to stock, and can damage the MAF sensor.
One Subaru tuner actually measured a 3 hp loss on the dyno with the K&N.
i know it sounds crazy, but my vette got worse gas mileage w/a KN, doesnt seem possible, but it does (about 2 MPG in town, or so, maybe less)
how can this be?? maybe my right foot got heavier also, lol
i have heard of putting a borla exhaust system on a LS1 firebird, and they lost 8 HP at the rear wheels?? also weird, its the computers i guess, w/the free flowiing intake/exhaust, maybe they dont compensate enough, or maybe overcompensate?? i dont know......
greg
how can this be?? maybe my right foot got heavier also, lol
i have heard of putting a borla exhaust system on a LS1 firebird, and they lost 8 HP at the rear wheels?? also weird, its the computers i guess, w/the free flowiing intake/exhaust, maybe they dont compensate enough, or maybe overcompensate?? i dont know......
greg
As has already been mentioned, you can see vastly different effects from a K&N depending on the car and other factors.
I know that on 4.6 liter Fords like the Mustang and Crown Vic K&Ns are notorious for ruining the MAF sensor by clogging it with oil particles. The results that I have seen suggest that on flat filters (as opposed to cylindrical ones) a disposable paper filter provides better filtration with about the same flow rate as a K&N.
Think about this: even "money is no object" performance cars like Corvettes and Porshes come with standard paper filters.
I know that on 4.6 liter Fords like the Mustang and Crown Vic K&Ns are notorious for ruining the MAF sensor by clogging it with oil particles. The results that I have seen suggest that on flat filters (as opposed to cylindrical ones) a disposable paper filter provides better filtration with about the same flow rate as a K&N.
Think about this: even "money is no object" performance cars like Corvettes and Porshes come with standard paper filters.
Paper cleans best, but is most restrictive.
Amsoil foam is good. I have used an Amsoil foam filter for over a year. I recently swapped a paper filter back in so that I could clean the Amsoil filter. Definitely had some power loss when I went back to paper. The main reason I chose the Amsoil over the K&N is because of the maintenance cycle: Amsoil every 25K or 1 year, K&N every 10K.
I have also read threads complaining that K&N Paper filters let too much particulate matter through in certain instances. Didn't see the filter first hand though.
Gas milage definitely went up whe I reinstalled the paper filter.
Amsoil foam is good. I have used an Amsoil foam filter for over a year. I recently swapped a paper filter back in so that I could clean the Amsoil filter. Definitely had some power loss when I went back to paper. The main reason I chose the Amsoil over the K&N is because of the maintenance cycle: Amsoil every 25K or 1 year, K&N every 10K.
I have also read threads complaining that K&N Paper filters let too much particulate matter through in certain instances. Didn't see the filter first hand though.
Gas milage definitely went up whe I reinstalled the paper filter.
RattlerXX
Gold Member
- Joined
- Nov 7, 2000
- Messages
- 3,004
I have K&N Filters on our current vehicles, and have put them on almost all of my past. I have also used Hypertech Chips, and Programmers, and have seen quite a bit of difference with the combo of the chip, and filter.
My latest project was a new crate motor in my Z71, and I have installed a Hypertech Chip, K&N Filter, Power Pulleys, TBI Spacer, and true dual exhaust. This made a world of difference.
My latest project was a new crate motor in my Z71, and I have installed a Hypertech Chip, K&N Filter, Power Pulleys, TBI Spacer, and true dual exhaust. This made a world of difference.